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Abaqus Release Notes - Abaqus 6.10 Documentation

1. Figure 4 1 Abaqus CAE options filtered for an Abaqus Standard or Abaqus Explicit analysis left and for an Abaqus CFD analysis right gt Abaqus CAE 6 10 iewport 1 File Model viewport View Part Shape Feature Help R Model Results amp Model Database x s E k OERA RCARRNRE Aa S Module Part x Model cFD Model x Part E Models 2 E CFD Model fb Parts 1 B Part 1 oh Features 1 amp Sets dp surfaces a Section Assignments Ba Mesh Empty F Materials i Sections as Assembly ob Steps 1 Bs Field Output Requests Fe History Output Requests T Interactions S amplitudes Li Loads acs fL Predefined Fields I Sketches Std Xpl Model sA annotations xz Analysis v b A 2 z Jobs of E n A solid model and the meshed midsurface shell model created from it are shown in Figure 4 2 Abaqus CAE Usage Part module Tools Midsurface Assign Tools Midsurface Assign Thickness and Offset References Abaqus CAE User s Manual e Assigning a section Section 12 14 1 in the online HTML version of this manual e Chapter 34 Midsurface modeling 4 3 MODELING Figure 4 2 A solid model and the shell mesh of the resulting midsurface model 4 3 View cuts in Abaqus CAE Product Abaqus CAE Benefits You can now use a planar view cut to display the interior of your model s geometry
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3. Abaqus Analysis User s Manual e Modeling discontinuities as an enriched feature using the extended finite element method Section 10 6 1 e Contour integral evaluation Section 11 4 2 Abaqus CAE User s Manual e Using the extended finite element method to model fracture mechanics Section 30 3 e Requesting contour integral output for XFEM Section 30 3 7 in the online HTML version of this manual Abaqus Keywords Reference Manual e CONTOUR INTEGRAL e ENRICHMENT Abaqus Benchmarks Manual e Contour integral evaluation two dimensional case Section 1 16 1 e Contour integral evaluation three dimensional case Section 1 16 2 e A penny shaped crack under concentrated forces Section 1 16 4 ANALYSIS PROCEDURES 6 7 Continued development of the XFEM based crack propagation capability Products Abaqus Standard Abaqus CAE Benefits The extended finite element method XFEM allows you to model discontinuities such as cracks along an arbitrary solution dependent path during an analysis Several new damage initiation criteria have been introduced to accurately predict the durability and damage tolerance of composite structures Fracture and failure in a dynamic event such as the thermal shock in a reactor pressure vessel or bone fracture in sports injuries can now be simulated with XFEM in an implicit dynamic procedure Within the framework of XFEM you can choose to model crack propagat
4. Section 3 3 1 e Overview of plot display customization Section 53 1 EXECUTION 3 Execution This chapter discusses commands and utilities for running any ofthe Abaqus products It provides an overview of the following enhancements e Parallel ordering for the direct sparse solver Section 3 1 e Thread parallel element and contact search calculations for implicit dynamic analyses Section 3 2 e Thread parallel element operations for quasi static analyses Section 3 3 e Double precision constraint solving within a single precision Abaqus Explicit execution Section 3 4 e Enhanced support for translation of Nastran bulk data files Section 3 5 e Dynamic load balancing for domain level parallel execution Section 3 6 3 1 Parallel ordering for the direct sparse solver Product Abaqus Standard Benefits The ordering procedure for the direct sparse solver will now run in parallel on computer clusters This may provide an overall performance gain for large problems run on multiple host machines in a computer cluster Description A new parallel ordering procedure for the direct sparse solver will be used when the direct sparse solver is executed on multiple host machines of a computer cluster This is an MPI only feature and will not be invoked when run in threaded only parallel mode The parallel ordering procedure will produce different orderings on different numbers of host machines and perfor
5. Improvements to filtered field output Section 13 13 e Enhancements to free body cuts Section 13 14 e Calculation of contour limits based on all frames in an animation Section 13 15 e Total time display for time history animation Section 13 16 13 1 Element nodal forces in beam section orientations Products Abaqus Standard Abaqus CAE Benefits You can now display element nodal forces caused by stress in the element in the same coordinate system used to output section forces and moments Description The new output variable NFORCSO displays the element nodal forces caused by stress in the element in the same coordinate system used to output section forces and moments NFORCSO differs from NFORC only in the coordinate system used for output while NFORCSO components are the internal forces in the beam coordinate system NFORC components are internal forces in the global coordinate system References Abaqus Analysis User s Manual e Abaqus Standard output variable identifiers Section 4 2 1 OUTPUT AND VISUALIZATION Abaqus Verification Manual e Element nodal forces in beam section orientation Section 5 2 5 13 2 PSD and RMS Mises stress contour and history plots from random response analysis Products Abaqus Standard Abaqus CAE Benefits You can now obtain both history and field output of PSD and RMS Mises stresses from random response analysis Description Both history output and fiel
6. Nodes 1000 Elements 100 OK 2 Cancel Figure 12 6 The Global Numbering Control dialog box Abaqus CAE Usage Mesh module Mesh Global Numbering Control Reference Abaqus CAE User s Manual e Changing the labels of all nodes and elements Section 17 17 10 in the online HTML version of this manual 12 7 Local node and element renumbering of orphan mesh parts Product Abaqus CAE 12 9 MESHING Benefits You can now specify the range of labels that will be applied to selected nodes or elements of an orphan mesh part This allows you to have consistent numbering for pre and postprocessing scripts and for creating node lists that are used to view results along a path Description The Edit Mesh toolset now allows you to renumber selected nodes and elements of an orphan mesh part You can renumber the selected nodes by specifying a starting node label and an increment or by offsetting the existing node label by a specified value You can select all of the nodes or elements in the part or you can use the following techniques to renumber only selected nodes or elements e Unordered Renumber the nodes or elements based on their existing numbers regardless of the order in which they are selected e Directed Path Renumber the nodes or elements along an edge from a selected start point to a selected end point e Sequence Renumber the nodes or elements based on the sequence in which you sel
7. Second order tetrahedral C3D10 elements 11 13 INTERACTIONS The two blocks are modeled with non matching meshes of second order tetrahedral C3D10 elements and linear elastic material behavior The analytical solution has the same variation of constraint pressure as that of the applied load which varies linearly from compressive stress of unity at the top edge of the interface to tensile stress of unity at the bottom edge of the interface Numerical predictions of constraint pressures are shown in Figure 11 7 the maximum and minimum predictions for the contact pressure deviate from the analytical solution by less than 1 with Abaqus Standard 6 10 using the new default quadratic smoothing whereas this deviation is 5 to 6 with Abaqus Standard 6 9 EF which uses linear smoothing CPRESS CPRESS 1 003e 00 6 678e 01 3 328e 01 2 095e 03 3 370e 01 6 719e 01 1 007e 00 1 047e 00 6 967e 01 3 461e 01 4 509e 03 3 551e 01 7 058e 01 1 056e 00 Contact pressure at interface Abaqus 6 10 Abaqus 6 9 EF Figure 11 7 Comparison of normal stresses at interface The numerical predictions will become more accurate as the mesh is refined so it is interesting to consider the deviation of numerical results from the analytical solution as a fraction of the variation of contact pressure over individual surface faces in this example this fraction is about 1 50 with Abaqus Standard 6 10 and about 1 7 with Abaqus S
8. settings of contact stabilization controls in certain regions to further improve performance without adversely affecting results References Abaqus Analysis User s Manual e Stabilization for general contact in Abaqus Standard Section 32 2 5 Abaqus Keywords Reference Manual e CONTACT STABILIZATION 11 8 Support for element and contact pair removal and reactivation in Abaqus CAE Product Abaqus CAE Benefits You can now deactivate and reactivate model and mesh regions in Abaqus CAE In addition Abaqus CAE now allows you to reactivate deactivated contact pairs These enhancements expand the support of Abaqus analysis product functionality Description The new model change interaction type allows you to deactivate and reactivate regions during an analysis and allows you to indicate that model change interactions may be present during a subsequent restart analysis A new model change interaction allows you to deactivate and reactivate elements skins stringers and geometry for a model You can also deactivate and reactivate elements skins and stringers for an orphan mesh This interaction type is available for all Abaqus Standard analysis procedures except for the static Riks procedure and linear perturbation procedures Stress displacement elements can be reactivated in a strain free state or with strain You can request detailed model change information to be written to the message file for an Abaqus Standard analysis
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10. 9 1 Eulerian mesh motion in Abaqus Explicit Products Abaqus Explicit Abaqus CAE Benefits When modeling an Eulerian material that translates or expands an appreciable amount moving the Eulerian mesh improves performance by allowing a smaller Eulerian mesh to be created and eases modeling the initial mesh when the deformation path is not known in advance Description By default material in an Eulerian section moves through the mesh without any mesh deformation This requires meshing the full deformation path of the Eulerian material and requires foreknowledge of the deformation in the problem to create the initial static mesh If the deformation path is large compared to the size of the region of interest a prohibitive number of elements must be created with only a small percentage at any given time involved in the region of interest Eulerian mesh motion allows the initial Eulerian mesh to expand contract and translate during an analysis so it always encompasses a specified material or surface as shown in Figure 9 1 Allowing the Eulerian mesh to follow the region of interest eliminates uncertainty in creating the initial mesh and utilizes computational resources more effectively by reducing the number of elements required The parameters that govern Eulerian mesh motion can be modified between analysis steps In Abaqus CAE Eulerian mesh motion is defined as a boundary condition in the Load module Abaqus CAE Usage Load module BC C
11. Frequency Evenly spaced time intervals 7 Interval 20 Timing Output at approximate times x J CTF Total forces and moments J CEF Elastic forces and moments I CVF Viscous Forces and moments I CDMG Overall damage IV CDERU Connector derived displacement IV CDERF Connector derived Force I CU Relative displacements and rotations TI CUE Elastic displacements and rotations I CUF Connector axial forces and moments TI CUP Plastic relative displacements and rotations I CUPEQ Equivalent plastic relative displacements and rotations if I Output for rebar Output at shell beam and layered section points Use defaults C Specify V Include local coordinate directions when available J Apply filter antialiasing z OK Cancel Figure 13 7 Connector field output variables 13 11 OUTPUT AND VISUALIZATION Abaqus CAE Usage Step module Create Field Output Domain Set Output Variables Connector References Abaqus Analysis User s Manual e Abaqus Standard output variable identifiers Section 4 2 1 e Abaqus Explicit output variable identifiers Section 4 2 2 Abaqus CAE User s Manual e Requesting output from connectors Section 23 9 e Displaying connectors in the Visualization module Section 23 11 e Chapter 42 Contouring analysis results 13 13 Improvements to filtered field output Products Abaqus Explicit Abaqus CAE Benefits Time ou
12. Release Notes SIMULIA Abaqus Release Notes Legal Notices CAUTION This documentation is intended for qualified users who will exercise sound engineering judgment and expertise in the use of the Abaqus Software The Abaqus Software is inherently complex and the examples and procedures in this documentation are not intended to be exhaustive or to apply to any particular situation Users are cautioned to satisfy themselves as to the accuracy and results of their analyses Dassault Syst mes and its subsidiaries including Dassault Syst mes Simulia Corp shall not be responsible for the accuracy or usefulness of any analysis performed using the Abaqus Software or the procedures examples or explanations in this documentation Dassault Syst mes and its subsidiaries shall not be responsible for the consequences of any errors or omissions that may appear in this documentation The Abaqus Software is available only under license from Dassault Syst mes or its subsidiary and may be used or reproduced only in accordance with the terms of such license This documentation is subject to the terms and conditions of either the software license agreement signed by the parties or absent such an agreement the then current software license agreement to which the documentation relates Abaqus software updates are designated by Version Release and if applicable Maintenance Delivery Releases are software updates that include enhancements and new fu
13. Verifying your mesh Section 17 6 1 e Querying your mesh Section 17 6 2 e Verifying element quality Section 17 18 1 in the online HTML version of this manual e Obtaining mesh information Section 17 18 2 in the online HTML version of this manual 12 3 Improvements to adaptive remeshing Product Abaqus CAE Benefits The mesh sizing methods have been improved so that Abaqus CAE meets the specified error indicator targets using fewer iterations and generating fewer elements than in previous releases In addition you can now specify an approximate maximum number of elements in the remeshing rule region which provides you with more control over the mesh generated by Abaqus CAE Description The mesh sizing methods have been improved to refine the mesh aggressively in regions where the element base solution and the errors are large allowing Abaqus CAE to meet the specified error targets in fewer iterations In addition if you select the Minimum Maximum control method the mesh sizing has been improved to avoid overrefinement at regions where the base solution is low the result is a better mesh with fewer elements For larger models in which you have specified a small error indicator target Abaqus CAE s remeshing algorithm may produce an unreasonably large number of elements resulting in a prohibitively expensive analysis You can now prevent Abaqus CAE from creating a large number of elements by specifying an approxim
14. to display the current colors of each component in the model on the cutting plane Abaqus CAE changes the coloring of the model components on the cutting plane dynamically as you move the plane or change the color coding selections e Select to display the entire cap with a fixed color Abaqus CAE displays that color for all components on the cutting plane and does not change the color as you move the plane or change the color coding selections 4 4 MODELING Figure 4 3 View cut cap displayed on a turbocharger model In modules other than the Visualization module you can display one view cut at a time the Visualization module supports use of multiple active view cuts The View Cut toolbar shown in Figure 4 4 allows you to toggle the display of view cuts in modules other than the Visualization module and to customize their definition and display The View Cut toolbar is displayed by default Figure 4 4 The View Cut toolbar Abaqus CAE Usage All modules Tools View Cut Reference Abaqus CAE User s Manual e Chapter 77 Cutting through a model 4 5 MODELING 4 4 Modeling enhancements for Abaqus CFD Products Abaqus CFD Abaqus CAE Benefits New features in several modules of Abaqus CAE allow the creation of fluid parts and sections for Abaqus CFD analyses Description The new fluid part type is available only in Abaqus CFD models see Model types in Abaqus CAE Section 4 1 A three dimens
15. 11 11 11 12 11 13 11 14 11 15 11 16 11 17 11 18 12 1 12 2 12 3 12 4 12 5 12 6 12 7 12 8 12 9 12 10 12 11 12 12 13 14 15 16 1 1 Output and visualization Element nodal forces in beam section orientations PSD and RMS Mises stress contour and history plots from random response analysis Enhancements to output from direct steady state dynamic analysis Isosurface contour type for contour plots Allowing for multiple view cuts Interpolated values on cut surfaces for symbol plots Improved control over arrow color and display in symbol plots Combining data from multiple output databases Finding the nearest node to a point Finding the average temperature of a set of elements New output variables for connectors Field output for connectors Improvements to filtered field output Enhancements to free body cuts Calculation of contour limits based on all frames in an animation Total time display for time history animation User subroutines utilities and plug ins Define viscous and structural matrices via user subroutine UINTER Define fluid exchange via user subroutines VUFLUIDEXCHEFFAREA and VUFLUIDEXCH Utility routines to obtain principal stress strain values and directions in Abaqus Explicit Utility routines to obtain parallel processes information New location option for saving plug ins created with the Really Simple GUI RSG Dialog Builder Utility routine to obtain the volume fraction
16. Abaqus CAE User s Manual e Repairing small edges Section 67 5 2 in the online HTML version of this manual e Replace faces Section 67 6 3 in the online HTML version of this manual e Repairing small faces Section 67 6 4 in the online HTML version of this manual e Repairing a sliver Section 67 6 5 in the online HTML version of this manual 4 9 New tools for editing or repairing faces Product Abaqus CAE 4 9 MODELING Benefits Abaqus CAE now includes offset extend and blend face tools in the Geometry Edit toolset These tools can be used to edit or repair solid and shell geometry by creating new faces They are also useful for creating midsurface models Description In addition to the existing tools in the Geometry Edit toolset the new offset and blend tools allow you to add new faces to existing part geometry The extend tool allows you to extend model faces either in all directions or by selecting the edges through which you want the faces to extend The existing Create Face tool was renamed Cover to reflect its use covering a loop of edges with a new face and to keep it distinct from the new tools each of which also creates new faces in the model Abaqus CAE Usage Part module Tools Geometry Edit Face Cover Offset Extend or Blend References Abaqus CAE User s Manual e Chapter 34 Midsurface modeling e Covering edges with a new face Section 67 6 2 in the online HTML
17. CAST IRON TENSION HARDENING Abaqus Benchmarks Manual e Concrete slump test Section 1 1 10 e Biaxial tests on gray cast iron Section 3 2 9 Abaqus Verification Manual e Rate independent plasticity Section 2 2 9 Abaqus Theory Manual e Cast iron plasticity Section 4 3 7 7 4 Viscoelasticity with anisotropic elasticity in Abaqus Explicit Products Abaqus Explicit Abaqus CAE Benefits Viscoelastic behavior can be modeled with orthotropic anisotropic elasticity in Abaqus Explicit Description In Abaqus Explicit time domain viscoelasticity can now be used in conjunction with orthotropic anisotropic elasticity to model rate dependent material behavior However the viscoelasticity is assumed to be isotropic the relaxation function is independent of the loading direction The anisotropic 7 4 MATERIALS elastic response of the rate dependent material can be specified by defining either the instantaneous response or the long term response of the material Viscoelastic behavior can also be modeled when the Hashin damage criteria is used to model damage in fiber reinforced composites Abaqus CAE Usage Property module Material editor Mechanical Elasticity Viscoelastic Domain Time References Abaqus Analysis User s Manual e Time domain viscoelasticity Section 19 7 1 e Damage and failure for fiber reinforced composites overview Section 21 3 1 Abaqus CAE User s Manual e Defini
18. It provides an overview of the following enhancements e Mapped meshing performance Section 12 1 e Mesh verification queries and saved sets Section 12 2 e Improvements to adaptive remeshing Section 12 3 e Tetrahedral meshing enhancements Section 12 4 e Mesh seeding enhancements Section 12 5 e Global node and element renumbering of meshed parts or part instances Section 12 6 e Local node and element renumbering of orphan mesh parts Section 12 7 e Numbering merged nodes Section 12 8 e Preserving node and element labels in the input file Section 12 9 e Editing the mesh of a dependent part instance Section 12 10 e Selecting by feature edge Section 12 11 e Mesh retained on native parts upon model database upgrade Section 12 12 12 1 Mapped meshing performance Product Abaqus CAE Benefits The speed of the mapped meshing process is greatly improved over previous Abaqus releases As a result mapped meshing is now enabled by default for suitable model geometry Description By default when you mesh a shell region using free meshing with triangular elements or with quadrilateral elements and the advancing front algorithm Abaqus CAE now substitutes mapped meshing to improve the surface mesh quality for four sided regions Mapped meshing can also be used for e tetrahedral meshing of solids where the boundary surfaces are meshed with triangular elements
19. LATENT HEAT SOILS SPECIFIC HEAT Abaqus Example Problems Manual Permafrost thawing pipeline interaction Section 10 1 6 Abaqus Benchmarks Manual The one dimensional thermal consolidation problem Section 1 15 6 Consolidation around a cylindrical heat source Section 1 15 7 Abaqus Verification Manual Continuum pore pressure elements Section 1 4 7 Pore pressure submodeling Section 3 6 12 Pore thermal model change Section 3 8 9 TIE Section 5 1 26 Coupled pore thermal elements Section 5 1 27 6 24 MATERIALS 7 Materials This chapter discusses new material models or changes to existing material models It provides an overview of the following enhancements e Mohr Coulomb plasticity in Abaqus Explicit Section 7 1 e Critical state clay plasticity model in Abaqus Explicit Section 7 2 e Cast iron plasticity in Abaqus Explicit Section 7 3 e Viscoelasticity with anisotropic elasticity in Abaqus Explicit Section 7 4 e Transferring results with concrete damaged plasticity Section 7 5 e Finite strain viscoelasticity Section 7 6 e Finite strain viscoelasticity with Mullins effect Section 7 7 e Field expansion Section 7 8 e Viscous dissipation in a coupled analysis Section 7 9 e Low density foam materials in Abaqus CAE Section 7 10 e Combining equations of state with pressure dependent shear plas
20. Reading nodal output for temperature normalized concentration and electric potential from an output database into predefined field variables Section 9 3 7 8 MATERIALS References Abaqus Analysis User s Manual e Field expansion Section 23 1 3 Abaqus Keywords Reference Manual e EXPANSION Abaqus User Subroutines Reference Manual e UEXPAN Section 1 1 25 Abaqus Verification Manual e Gasket behavior verification Section 1 3 43 e Continuum stress displacement elements Section 1 4 1 e Shell membrane and truss stress displacement elements Section 1 4 4 7 9 Viscous dissipation in a coupled analysis Product Abaqus Standard Benefits This feature can be helpful in predicting the temperature changes in a structure due to viscous dissipation Description When time domain viscoelasticity is specified as part of a hyperelastic material definition Abaqus allows conversion of some or all of the viscoelastic dissipation into heat input during a fully coupled temperature displacement analysis References Abaqus Analysis User s Manual e Time domain viscoelasticity Section 19 7 1 Abaqus Keywords Reference Manual e HYPERELASTIC e INELASTIC HEAT FRACTION e VISCOELASTIC Abaqus Verification Manual e Viscoelastic materials Section 2 2 2 7 9 MATERIALS Abaqus Theory Manual e Finite strain viscoelasticity Section 4 8 2 7 10 Low density foam mat
21. Section 4 1 38 ELEMENTS e SURFACE TYPE CUTTING SURFACE Section 5 1 12 e MPC Section 5 1 16 e Integrated output variables Section 5 2 3 8 4 Fluid elements in Abaqus CFD Products Abaqus CFD Abaqus CAE Benefits Fluid elements allow you to discretize the fluid domain in a fluid flow analysis Description For an Abaqus CFD analysis the sole purpose of the fluid element type is to define the shape of the element used to discretize the continuum Two new fluid elements are available FC3D4 and FC3D8 Abaqus CAE Usage Mesh module Mesh Element Type Family Fluid References Abaqus Analysis User s Manual e Fluid continuum elements Section 25 2 1 e Fluid element library Section 25 2 2 Abaqus CAE User s Manual e Element type assignment Section 17 5 3 PRESCRIBED CONDITIONS 9 Prescribed conditions This chapter discusses loads boundary conditions and predefined fields It provides an overview of the following enhancements e Eulerian mesh motion in Abaqus Explicit Section 9 1 e Eulerian boundary conditions in Abaqus CAE Section 9 2 e Reading nodal output for temperature normalized concentration and electric potential from an output database into predefined field variables Section 9 3 e CONWEP blast loading in Abaqus Explicit Section 9 4 e Enhancements to initial conditions Section 9 5 e Plotting amplitude data Section 9 6
22. Section 9 2 e Contour integrals are now available as output when modeling fracture mechanics using the extended finite element method Contour integral evaluation improvements Section 6 6 e Several existing analysis features can now be fully defined in Abaqus CAE including Direct cyclic and low cycle fatigue analyses Direct cyclic analysis in Abaqus CAE Section 6 15 Model change definitions which allow the deactivation and reactivation of model regions and contact pairs during an analysis Support for element and contact pair removal and reactivation in Abaqus CAE Section 11 8 Cylindrical elements Support for cylindrical elements in Abaqus CAE Section 8 1 Two dimensional pressure penetration Pressure penetration in Abaqus CAE Section 11 2 e You can analyze structures subject to blast loading using the CONWEP air blasting model in Abaqus Explicit CONWEP blast loading in Abaqus Explicit Section 9 4 e New material models extend the capabilities for realistic simulation in Abaqus Abaqus Explicit now supports the Mohr Coulomb plasticity model and the clay plasticity model Mohr Coulomb plasticity in Abaqus Explicit Section 7 1 Critical state clay plasticity model in Abaqus Explicit Section 7 2 Viscoelasticity behavior can now be modeled with anisotropic elasticity and with the unidirectional fiber reinforced composite damage model Visco
23. The Restart Needed line will indicate either YES_RECOMMENDED YES REQUIRED or NO Reference Abaqus Installation and Licensing Guide e Windows platforms Section 2 6 2 2 1 GENERAL ENHANCEMENTS 2 2 Upgrade of Microsoft Visual C runtime libraries Benefits Updated versions of prerequisite runtime libraries are provided and installed during the Abaqus product installation Description On Windows platforms the Microsoft Visual C 2005 SP1 and 2008 SP1 runtime libraries are required to run Abaqus These runtime libraries are installed automatically during an Abaqus product installation The runtime libraries can also be installed independently of the Abaqus product installation using the startup interface or files provided on the Abaqus Licensing amp Products DVD Reference Abaqus Installation and Licensing Guide e Abaqus product installation procedure Section 2 1 3 2 3 Installation of MPI libraries for parallel execution on Windows Benefits Message Passing Interface MPI components required for parallel execution are provided and installed during the Abaqus product installation Description On Windows x86 64 platforms the Abaqus product installer automatically installs the Microsoft MPI libraries On Windows x86 32 platforms the Abaqus product installer automatically launches the installer for the Hewlett Packard HP Message Passing Interface library HP MPI These libraries are required to use MPI based
24. assemblies and models to or from Abaqus CAE e Chapter 6 Analysis procedures features related to defining an analysis e Chapter 7 Materials new material models or changes to existing material models e Chapter 8 Elements new elements or changes to existing elements e Chapter 9 Prescribed conditions loads boundary conditions and predefined fields e Chapter 10 Constraints kinematic constraints e Chapter 11 Interactions features related to contact and interaction modeling e Chapter 12 Meshing features related to meshing your model e Chapter 13 Output and visualization obtaining postprocessing and visualizing results from Abaqus analyses e Chapter 14 User subroutines utilities and plug ins additional user programs that can be run with Abaqus e Chapter 15 Abaqus Scripting Interface using the Abaqus Scripting Interface to write user scripts Each entry in these chapters clearly indicates the Abaqus product or products to which the feature applies and includes cross references to more detailed information Chapter 16 Summary of changes summarizes in tabular format the changes to Abaqus elements keyword options user subroutines and output variable identifiers 1 1 Key features of Abaqus 6 10 This section provides brief descriptions of some of the most significant new capabilities and enhancements available in Abaqus 6 10 refer to the table o
25. assignments This query also enables you to save these regions into a named set Abaqus CAE Usage Property module Tools Query Regions missing sections Reference Abaqus CAE User s Manual e Using the Query toolset to obtain assignment information Section 12 17 in the online HTML version of this manual 4 17 MODELING 4 22 Enhancements to the Datum toolset Product Abaqus CAE Benefits Additional selection options allow for greater flexibility when creating datum points Description Abaqus CAE now supports the selection of curved faces and curved edges when creating a datum point You can use the Datum toolset to create a datum point by projecting onto a face or plane The face can be curved or planar You can also create a datum point by projecting onto an edge or a datum axis The edge can be curved or straight Abaqus CAE Usage All modules Tools Datum Project point on face plane Tools Datum Project point on edge datum axis References Abaqus CAE User s Manual e An overview of the methods for creating a datum point Section 60 5 1 e Creating a datum point by projecting a point on a face or plane Section 60 6 6 in the online HTML version of this manual e Creating a datum point by projecting a point on an edge or datum axis Section 60 6 7 in the online HTML version of this manual 4 23 Rendering of shell thickness Product Abaqus CAE Benefits Abaqus CAE now enables
26. or Load module Tools Discrete Field Create for fields associated with elements and defined using orientations toggle on Supplied orientation directions are defined in part space References Abaqus Analysis User s Manual e Orientations Section 2 2 5 e Defining an assembly Section 2 9 1 Abaqus CAE User s Manual e Creating discrete fields Section 61 2 in the online HTML version of this manual Abaqus Keywords Reference Manual e DISTRIBUTION 4 16 Expanded use of distributions for shell sections Product Abaqus Explicit Benefits You can now define distributions of composite layer angles and shell general section stiffnesses in Abaqus Explicit analysis Description Abaqus Explicit now supports distribution of layer angles for composite shell sections and composite shell general sections It also supports distributions of user defined section stiffness for homogeneous shell general sections References Abaqus Analysis User s Manual e Using a shell section integrated during the analysis to define the section behavior Section 26 6 5 e Using a general shell section to define the section behavior Section 26 6 6 Abaqus Keywords Reference Manual e DISTRIBUTION e SHELL GENERAL SECTION e SHELL SECTION 4 14 MODELING 4 17 Control over individual vector display in continuum shell composite layups Product Abaqus CAE Benefits You can now toggle the display of individua
27. 1 2 3 4 5 for conventional shells n 1 2 3 4 5 6 for continuum shells n 1 2 3 for beams and pipes Whole element variables mod S NFORC Forces at the nodes of an element from both the hourglass and the regular deformation modes of that element internal forces in the global coordinate system new S NFORCSO Forces at the nodes of a beam element caused by the stress resultants in the element internal forces in the beam section orientation coordinate system Element variables new C COORD Coordinates of the element centroid for solid elements These are the current coordinates if the mesh has moved new C DENSITY Fluid density new C DIST Wall normal distance new C DIV Divergence of the fluid velocity new C ENSTROPHY Enstrophy per unit mass new C EVOL Element volume new C HELICITY Dot product of vorticity and velocity new C PRESSURE Fluid pressure 16 13 SUMMARY OF CHANGES new C new C new C new C new C Nodal variables new C new C new C new C new C new C new C new C new S new S TEMP Fluid temperature TURBNU Turbulent eddy viscosity Vv Fluid velocity VGINV2 Second invariant of the velocity gradient VORTICITY Curl of the velocity vector COORD Coordinates of the node These are the current coordinates if the mesh has moved COORn Coordinate n n 1 2 3 DENSITY Fluid
28. 12 8 shows the prompt area during a set creation procedure where the elements for the set are selected using the feature edge method Figure 12 9 illustrates how the feature edge method allows you to select all the nodes along the connected edges of a flange of an exhaust manifold 12 12 MESHING Select the elements For the set by feature edge M 20 0 Done Figure 12 8 The prompt area during the set creation procedure Bee FRS SSA LSA E lt S DS ia B Z KSS IES RS B WS LZ Sue A LOLITAS Q L sas y LO ORT ZL ISN AA AUO LPY ee USED eae 5 Me J Wace MOLLER OS OFX WON Se aly x Roe ie BENENSON MES ROE NOLAN i N S i ORN VOS gt Figure 12 9 Selecting the nodes along an edge Abaqus CAE Usage All modules Prompt area select the by feature edge method References Abaqus CAE User s Manual e Using the angle and feature edge method to select multiple objects Section 6 2 3 e What can I do with the Edit Mesh toolset Section 62 1 12 13 MESHING 12 12 Mesh retained on native parts upon model database upgrade Product Abaqus CAE Benefits You can now upgrade a model database and unlock one of its native parts without losing the mesh associated with that native part These meshes were previously deleted upon unlocking of the native part Description When you upgrade a model
29. Abaqus CAE Benefits The iterative solver can be dramatically more efficient than the direct sparse solver for a small class of problems Description An initial implementation of a new iterative solver is available with this release This new iterative solver replaces the domain decomposition iterative solver DDM that was available in previous releases The new iterative solver provides improved robustness performance memory use and scalability in terms of parallelization as well as model size over the DDM iterative solver The iterative solver should be considered only when the number of floating point operations FLOPS required for the direct sparse solver per iteration is prohibitive Blocky structures with millions of degrees of freedom typically fall into this category engineering applications that employ such models include powertrain oil reservoir and material microstructure simulations While the iterative solver can provide dramatic reductions in simulation turn around times it should be used only in these kinds of applications due to various analysis feature coverage limitations See Iterative linear equation solver Section 6 1 5 of the Abaqus User s Manual for more details The performance data presented in Table 6 1 demonstrate the strengths of the iterative solver solution for a powertrain simulation The two problems used are identical except for mesh resolution which results in two different model sizes in terms of d
30. Abaqus CAE User s Manual e Stitching edges to create faces Section 67 5 1 in the online HTML version of this manual 4 13 Enhanced support in Abaqus CAE for modeling fracture mechanics using XFEM Product Abaqus CAE Benefits When modeling fracture mechanics with the extended finite element method XFEM in Abaqus CAE you can now study stationary cracks in addition to growing cracks specify a value for the enrichment radius and specify a viscosity coefficient These enhancements increase the coverage of Abaqus analysis product functionality Description The following functionality for modeling fracture mechanics with XFEM is now supported in Abaqus CAE e When you are defining the material you can specify a viscosity coefficient to introduce localized damping using the viscous regularization technique which assists convergence as the material fails e Previous releases of Abaqus CAE allowed you to study cracks that grew arbitrarily through your model You can now choose to study stationary cracks in addition to growing cracks e The enrichment radius is a small radius from the crack tip within which the elements will be used for calculating crack singularity for a stationary crack You can now specify the value of the enrichment radius whereas previous releases of Abaqus CAE assumed the default value for the enrichment radius three times the typical element characteristic length in the enriched area Abaqus CAE Usage P
31. Abaqus Explicit analysis for co simulation Section 14 1 2 e Abaqus Standard to Abaqus Explicit co simulation Section 14 1 4 Abaqus CAE User s Manual e Chapter 25 Co simulations Abaqus Keywords Reference Manual e CO SIMULATION CONTROLS Abaqus Verification Manual e Abaqus Standard to Abaqus Explicit co simulation Section 3 18 2 6 9 Global damping and damping controls in matrix and substructure generation procedures Product Abaqus Standard Benefits You can create global damping matrices as part of a matrix generation procedure and condensed damping matrices as part of a substructure generation procedure You can control the matrix and substructure generation process making these procedures more versatile and efficient Description Global viscous and structural damping matrices can now be generated for user supplied global mass and stiffness proportional damping coefficients during matrix and substructure generation procedures in Abaqus Standard You can also control the content of overall damping matrices in the damping matrix operators Damping control options allow you to e generate viscous structural damping matrices that include material and or element properties only e generate viscous structural damping matrices that include global damping properties only e generate viscous structural damping matrices that include combined material and global properties or e exclude viscous and or structural da
32. Abaqus Standard Section 32 2 1 11 4 General contact diagnostics Product Abaqus Standard Benefits It is now easier to determine causes of diagnostic messages associated with general contact in Abaqus Standard Description Diagnostic messages for general contact now specify more concise surfaces involved in the issue in addition to identifying a slave node involved in the issue as in previous versions Surfaces 11 4 INTERACTIONS referenced by these messages are internal component surfaces automatically created for general contact with names such as General Contact Component_3 It is often helpful to visualize these surfaces in the Visualization module of Abaqus CAE when determining the cause of a diagnostic message In previous versions these diagnostic messages referenced an internal surface called General Contact Faces which includes all surface facets considered by general contact References Abaqus Analysis User s Manual e Defining general contact interactions in Abaqus Standard Section 32 2 1 Abaqus CAE User s Manual e Understanding how to create display groups Section 75 1 1 11 5 Visualizing initial strain free adjustments Product Abaqus Standard Benefits It is now easier to review initial strain free adjustments made by Abaqus Standard Description A new output variable STRAINFREE is provided to facilitate visualization of initial strain free adjustments of nodal positions As
33. CAE Usage Job module Job Create Parallelization tabbed page Toggle on Use multiple processors and specify the number of processors and domains Toggle on Activate dynamic load balancing References Abaqus Analysis User s Manual e Abaqus Standard Abaqus Explicit and Abaqus CFD execution Section 3 2 2 e Domain level parallelization in Parallel execution in Abaqus Explicit Section 3 5 3 Abaqus CAE User s Manual e Controlling job parallel execution Section 18 7 8 in the online HTML version of this manual 4 MODELING Modeling This chapter discusses features related to creating your model such as node and element definition in Abaqus Standard or Abaqus Explicit and part and assembly definition in Abaqus CAE It provides an overview of the following enhancements Model types in Abaqus CAE Section 4 1 Midsurface modeling Section 4 2 View cuts in Abaqus CAE Section 4 3 Modeling enhancements for Abaqus CFD Section 4 4 Topology tracking in the Sketcher Section 4 5 Three dimensional sweep paths for swept features Section 4 6 Selection of individual faces for repair of face normals Section 4 7 Geometry repair for shells and solid parts that contain multiple cells Section 4 8 New tools for editing or repairing faces Section 4 9 Improvements to repair of small edges and small faces Section 4 10 Automatic validity check aft
34. CFD execution Section 3 2 2 e Using the Abaqus environment settings Section 3 3 1 e Procedures overview Section 6 1 1 Abaqus CAE User s Manual e Controlling job precision Section 18 7 9 in the online HTML version of this manual 3 5 Enhanced support for translation of Nastran bulk data files Products Abaqus Standard Abaqus Explicit Benefits You can now translate CDH style welds from a Nastran bulk data file to rigid or compliant fasteners in Abaqus You can also translate additional frequency related elements in Nastran Description The abaqus fromnastran execution procedure now includes the parameter cdh_weld which enables you to translate CHEXA elements with RBE3 elements at all eight corner nodes to rigid or compliant fasteners in Abaqus The cdh_weld parameter was first added in Abaqus 6 9 EF in that original implementation you could translate such elements to rigid fasteners but not compliant fasteners By default in Abaqus 6 10 CHEXA elements with RBE3 elements at all eight corner nodes are translated to the type of 8 node element specified in the chexa parameter If cdh_weld RIGID CHEXA elements with RBE3 elements at all eight corner nodes are translated to rigid fasteners in Abaqus If cdh_weld COMPLIANT CHEXA elements with RBE3 elements at all eight corner nodes are translated to compliant fasteners in Abaqus Abaqus also now supports the translation of FREQ3 and FREQ4 entities in Nastran to mode
35. For example when you copy a part named Plate Plate Copy appears in the Part Copy dialog box as the default name for the new part You can now transfer the abaqus_v6 10 gpr file with your saved display options and user specified settings for the contact detection tool to a different computer The view orientation triad has been updated as shown in Figure 2 1 The Excel Utilities plug in which allows you to exchange amplitude data and X Y data between Abaqus CAE and Excel is now available on Windows platforms running the 64 bit version of the operating system Y A Z X Figure 2 1 New viewport orientation triad Abaqus CAE Usage All modules File Compress MDB GENERAL ENHANCEMENTS File Save Options Plug ins Tools Excel Utilities References Abaqus CAE User s Manual e Components of the viewport Section 2 2 5 e Managing objects Section 3 4 e Compressing the file size of the current model database Section 9 7 12 in the online HTML version of this manual e Saving your display options settings Section 73 15 e Exchanging data between Abaqus CAE and Microsoft Excel Section 79 9 in the online HTML version of this manual 2 7 Using wildcard characters for file selection Product Abaqus CAE Benefits You can now use wildcard characters in Abaqus CAE file selection dialogs to narrow the list of files within a directory This is useful when a single directory is used to s
36. Other input includes the amount of explosives equivalent mass of TNT Abaqus CAE Usage Interaction module Interaction Create Incident wave select CONWEP Air Surface blast from the prompt area Interaction Property Create Incident wave Air blast or Surface blast References Abaqus Analysis User s Manual e Acoustic and shock loads Section 30 4 5 PRESCRIBED CONDITIONS Abaqus CAE User s Manual e Defining incident waves Section 15 13 15 in the online HTML version of this manual e Defining an incident wave interaction property Section 15 14 5 in the online HTML version of this manual Abaqus Keywords Reference Manual e CONWEP CHARGE PROPERTY e INCIDENT WAVE INTERACTION e INCIDENT WAVE INTERACTION PROPERTY 9 5 Enhancements to initial conditions Product Abaqus Standard Benefits Initial stresses and initial pore fluid pressures for a coupled pore fluid diffusion stress analysis can be defined based on output variables read from an output database file Description The initial pore pressure values can now be defined using nodal pore pressure output variables from the output database odb file of a previous Abaqus Standard analysis Similarly initial stresses can be defined using stress output variables from the output database file of a previous Abaqus Standard analysis You must specify the step and the increment numbers of the analysis from which the variables are read In additi
37. S E new E new E new S BURNF Burn fraction of the ignition and growth material DBURNF Reaction rate of the ignition and growth material MISESMAX Maximum Mises stress among all of the section points For a shell element it represents the maximum Mises value among all the section points in the layer for a beam or pipe element it is the maximum Mises stress among all the section points in the cross section and for a solid element it represents the Mises stress at the integration points PEEQMAX Maximum equivalent plastic strain PEEQ among all of the section points For a shell element it represents the maximum PEEQ value among all the section points in the layer for a beam or a pipe element it is the maximum PEEQ among all the section points in the cross section and for a solid element it represents the PEEQ at the integration points PEEQT Equivalent plastic strain in uniaxial tension for cast iron Mohr Coulomb tension cutoff and concrete damaged plasticity which is defined as f a dt RHOE Density of the unreacted explosive in the ignition and growth material RHOP Density of the reacted gas product in the ignition and growth material RMISES Root mean square of Mises equivalent stress 16 12 SUMMARY OF CHANGES Element section variable mod E SEn Section nominal strain component n n 1 2 3 4 5 6 for shells n 1 2 3 for beams and pipes mod E SFn Section force component n n
38. align the normals of the selected faces Abaqus CAE Usage Part module Tools Geometry Edit Face Repair normals Entire Part or Select Faces MODELING Reference Abaqus CAE User s Manual e Repairing face normals Section 67 6 6 in the online HTML version of this manual 4 8 Geometry repair for shells and solid parts that contain multiple cells Product Abaqus CAE Benefits Abaqus CAE now enables you to use six additional tools in the Geometry Edit toolset repair small edges repair small faces replace faces by extending neighboring faces repair slivers in shell or solid parts convert to analytical representation and convert to precise representation to perform repairs of shell or solid parts that contain multiple cells This enhancement expands the scope of the geometry repair options in Abaqus CAE Description You can now repair small edges repair small faces replace faces by extending neighboring faces repair slivers convert entities to an analytical representation and convert entities to a precise representation in shell or solid parts containing multiple cells These six Geometry Edit toolset options were previously limited to part geometry that contained only a single cell Abaqus CAE Usage Part module Tools Geometry Edit Edge Repair small Tools Geometry Edit Face Repair small Replace or Repair sliver Tools Geometry Edit Part Convert to analytical or Convert to precise References
39. and directions in Abaqus Explicit Product Abaqus Explicit Benefits You can now obtain principal stress strain values and directions in Abaqus Explicit using the utility routines VSPRINC and VSPRIND Description Two new utility routines are available in Abaqus Explicit for calculating principal stress strain values and principal stress strain directions from the relevant tensors 14 2 USER SUBROUTINES UTILITIES AND PLUG INS e VSPRINC Calculate principal values e VSPRIND Calculate principal values and directions These routines can be called from any Abaqus Explicit user subroutine that stores stress and strain components according to the convention presented in Conventions Section 1 2 2 of the Abaqus Analysis User s Manual such as from user subroutine VUMAT Reference Abaqus User Subroutines Reference Manual e Obtaining principal stress strain values and directions in an Abaqus Explicit analysis Section 2 1 12 14 4 Utility routines to obtain parallel processes information Products Abaqus Standard Abaqus Explicit Benefits You can now obtain the number of processes and the rank of the process from any user subroutine in Abaqus Description Utility routines GETNUMCPUS and GETRANK can be called from any Abaqus Standard user subroutine GETNUMCPUS returns the number of MPI processes and GETRANK returns the rank of the MPI process from which the function is called For example in a hybrid MPI and thre
40. arbitrary dynamic modes for substructure generation Section 6 12 Enhancements to coupled structural acoustic analysis Section 6 13 Enhancements to steady state dynamics user interface Section 6 14 Direct cyclic analysis in Abaqus CAE Section 6 15 AMS eigensolver performance improvements Section 6 16 Random response analysis based on the SIM architecture Section 6 17 Submodeling based on the driven nodes only found lying within the global model Section 6 18 Enhancements to the geostatic procedure Section 6 19 Enhancements to complex eigenvalue extraction analysis Section 6 20 Enhancement to the geostatic and soils consolidation capabilities to model coupled heat transfer Section 6 21 Abaqus CFD analysis Products Abaqus CFD Abaqus CAE Benefits Abaqus CFD provides scalable parallel CFD simulation capabilities to address a number of nonlinear coupled fluid thermal and fluid structural problems Description Abaqus CFD is a new product offering in the Unified Finite Element Analysis product suite You can use Abaqus CFD to perform fluid dynamic analyses Support for fluid material properties fluid elements prescribed conditions output execution parallel execution and restart is available You can also 6 1 ANALYSIS PROCEDURES use Abaqus CFD to perform fluid structure interaction and conjugate heat transfer see Abaqus CFD to Abaqus Standard or to Abaqus Explici
41. based definitions of excitation frequencies for steady state dynamic procedures in Abaqus EXECUTION Reference Abaqus Analysis User s Manual e Translating Nastran bulk data files to Abaqus input files Section 3 2 21 3 6 Dynamic load balancing for domain level parallel execution Products Abaqus Explicit Abaqus CAE Benefits Dynamic load balancing improves performance of statically and dynamically imbalanced domain level parallel problems Description For cases exhibiting significant load imbalance either because the initial load balancing is not adequate static imbalance or because imbalance develops over time dynamic imbalance the dynamic load balancing technique can be applied Dynamic load balancing is based on overdecomposition the user selects a number of domains that is a multiple of the number of processors During the calculation Abaqus Explicit regularly measures the computational expense and redistributes the domains over the processors so as to minimize the load imbalance and improve performance Dynamic load balancing is most likely to improve the computational speed and efficiency in applications with a strongly time dependent and or spatially varying computational loads Examples include models containing airbags where contact impact activity is localized and time dependent and coupled Eulerian Lagrangian models where constitutive activity follows the material as it moves through empty space Abaqus
42. behavior e Abaqus CFD This product is a computational fluid dynamics program with extensive support for preprocessing simulation and postprocessing in Abaqus CAE Abaqus CFD provides scalable parallel CFD simulation capabilities to address a number of nonlinear coupled fluid thermal and fluid structural problems Preprocessing and postprocessing e Abaqus CAE This product is a Complete Abaqus Environment that provides a simple consistent interface for creating submitting monitoring and evaluating results from Abaqus simulations Abaqus CAE is divided into modules where each module defines a logical aspect of the modeling process for example defining the geometry defining material properties generating a mesh submitting analysis jobs and interpreting results e Abaqus Viewer This subset of Abaqus CAE contains only the postprocessing capabilities of the Visualization module It uses the output database odb to obtain results from the analysis products The output database is a neutral binary file Therefore results from an Abaqus analysis run on any platform can be viewed on any other platform supporting Abaqus Viewer It provides deformed configuration contour vector and X Y plots as well as animation of results INTRODUCTION TO Abaqus 6 10 Add on analysis Abaqus Aqua This add on analysis capability for Abaqus Standard provides wave loading drag and buoyancy calculation capabilities for modeling offshore piping and
43. behavior of a single leg bending specimen Section 1 4 8 e Postbuckling and growth of delaminations in composite panels Section 1 4 9 Abaqus Benchmarks Manual e Delamination analysis of laminated composites Section 2 7 1 11 10 User defined range for which contact opening output is provided Product Abaqus Standard Benefits You can now visualize contact opening distances while contact surfaces are separated Description You can now extend the range for which Abaqus Standard provides contact opening COPEN output for gaps between contact surfaces By default to keep contact search computational costs low COPEN for finite sliding surface to surface contact and general contact is typically not provided where surfaces are opened by more than a small amount compared to surface facet dimensions However COPEN can now be provided for gap distances up to at least a user specified tracking thickness Figure 11 5 compares two contour plots of COPEN output for a meshed sphere touching a flat plate which is not shown at a single point The results shown on the left are based on an analysis with default tracking thickness so COPEN is reported for a small region The results shown on the right are based on an analysis with the tracking thickness set to 2 5 extending the region in which COPEN is reported Using this control may increase computational costs due to extra contact tracking computations especially if a large track
44. but one of the facets is much larger than the other an infinitesimal to finite approximation is used For all other cases a contour integral is calculated numerically using the integration points on each edge to compute the viewfactor The lumped area approximation was the only available method of viewfactor calculation in previous releases To revert back to the old radiation viewfactor behavior set both the Lumped area distance square value and Infinitesimal facet area ratio parameters to zero Figure 11 8 shows the the default viewfactor selections for a cavity radiation interaction in the Abaqus CAE Edit Interaction dialog box Abaqus CAE Usage Interaction module Interaction Create Cavity radiation Viewfactors Infinitesimal facet area ratio Gauss integration points per edge and Lumped area distance square value or Defaults to reset the default values for all viewfactor parameters 11 15 INTERACTIONS W Edit Interaction i x Name Int 1 Type Cavity radiation Step Step 1 Heat transfer Definition Closed Open Ambient temperature Properties Symmetry l I Specify blocking range Accuracy tolerance 0 05 Infinitesimal facet area ratio Jes Gauss integration points per edge fs s Lumped area distance square value Defaults Cancel Figure 11 8 Cavity radiation viewfactor default settings in Abaqus CAE References Abaqus Analysis User s Manual e Cavity ra
45. default Tolerance Specify scale factor Specify value Figure 6 3 Incrementation tab of the dynamic implicit Edit Step dialog box ANALYSIS PROCEDURES Ml Edit Step x Name Step 1 Type Dynamic Implicit Basic Incrementation Other M Equation Solver Matrix storage Use solver default Unsymmetric Symmetric Warning The analyis code may override your matrix See STEP UNSYMM in the Abaqus Keywo M Solution Technique Solution technique Full Newton Quasi Newton Number of iterations allowed before the kernel matrix is reformed fe Convert severe discontinuity iterations Propagate from previous step x Analysis product default M Default load variation with time Instantaneous Ramp linearly over step Extrapolation of previous state at start of each incremet Analysis product default w Time Integrator Parameter Alpha Analysis product default X Specify Initial acceleration calculation at beginning of step dllow Bypass Figure 6 4 Other tab of the dynamic implicit Edit Step dialog box References Abaqus Analysis User s Manual e Procedures overview Section 6 1 1 e Dynamic analysis procedures overview Section 6 3 1 e Implicit dynamic analysis using direct integration Section 6 3 2 Abaqus CAE User s Manual e Configuring a dynamic implicit procedure in Configu
46. density at a node DIST Wall normal distance DIV Divergence of the fluid velocity at a node ENSTROPHY Enstrophy per unit mass at a node HELICITY Helicity at a node PRESSURE Fluid pressure at a node PSILSM Signed distance function to describe the initial crack front STRAINFREE Strain free adjustments to initial nodal positions 16 14 new C new C new C new C new C new C new C new C new C Surface variables mod E mod E mod E mod E mod E mod E SUMMARY OF CHANGES TEMP Fluid temperature at a node TURBNU Turbulent eddy viscosity at a node U Fluid displacement components at a node Un Um fluid displacement component n 1 2 3 Vv Fluid velocity components at a node Vn tm fluid velocity component n 1 2 3 VGINV2 Second invariant of the velocity gradient VORTICITY Vorticity components at a node VORTICITYn Vorticity vorticity component n 1 2 3 BDSTAT Bond state the state is 1 0 if bonded 0 0 if unbonded CRSTS All components of critical stress at failure DBS All components of remaining stress in the failed bond DBSF Fraction of stress that remains at bond failure DBT Time when bond failure occurs EFENRRTR Effective energy release ratio 16 15 5 SUMMARY OF CHANGES mod E mod E ENRRT All components of strain energy release rate OPENBC Relative displacement be
47. e Element type assignment Section 17 5 3 12 6 MESHING Free meshing with triangular and tetrahedral elements Section 17 10 3 Choosing an element shape Section 17 17 2 in the online HTML version of this manual 12 5 Mesh seeding enhancements Product Abaqus CAE Benefits You now have additional control over the edge seeding that is created by Abaqus CAE and hence the quality of the mesh In addition the user interface has been improved to simplify the process of generating the desired seeding Description The following enhancements have been added to the edge seeding procedures You can now use drag select to select multiple edges to seed You can now choose double bias seeding that results in the mesh density varying from the center of the edge toward each end of the edge Figure 12 4 shows edges of a face with single and double bias seeding Double bias gt oO lia oO A oO Single bias 4 A Single bias o A A Figure 12 4 Single and double bias seeding When you generated single bias seeding with previous releases of Abaqus CAE you could specify only the number of elements to generate and the bias ratio When you are applying bias seeding single or double you now have the option to specify the minimum and maximum element size that Abaqus CAE should generate When you are
48. e hexahedral meshing of solids using the swept meshing technique if the source face is meshed with quadrilateral elements using the advancing front algorithm In past releases of Abaqus mapped meshing could be time consuming especially for models that had many suitable regions The surface meshing algorithms have been refined such that the mapped meshing process now approaches and in some cases may be faster than the time required to complete a surface mesh for the same model without mapped meshing Table 12 1 shows the improvement in speed between the previous Abaqus release and the current release for models where mapped meshing was allowed The time shown in the table is the time required to complete the triangular surface mesh MESHING Table 12 1 Performance improvements in surface meshing operations that utilize the mapped meshing technique Part Number Abaqus 6 9 Abaqus 6 10 Speed up of faces sec sec ratio Engine block 1 3994 57 3 23 5 2 4x Engine block 2 7754 167 3 51 7 3 2x Engine block 3 11696 438 4 59 8 7 3x Engine block 4 14733 918 0 100 0 9 2x Ship hull 14714 1842 0 48 0 38x To prevent Abaqus CAE from evaluating suitable regions for mapped meshing toggle off Use mapped meshing where appropriate in the Mesh Controls dialog box Abaqus CAE Usage Mesh module Mesh Controls toggle Use mapped meshing where appropriate to allow or prevent mapped meshing for the selected region Refe
49. files for Windows platforms Section 2 1 e Upgrade of Microsoft Visual C runtime libraries Section 2 2 e Installation of MPI libraries for parallel execution on Windows Section 2 3 e Installation of PDF documentation Section 2 4 e Performance improvements in Abaqus CAE Section 2 5 e Usability enhancements in Abaqus CAE Section 2 6 e Using wildcard characters for file selection Section 2 7 e Enhancements to overlay plots Section 2 8 e Linking field output across viewports Section 2 9 e Accessing plot display customization options from the Visualization module toolbox Section 2 10 2 1 Silent uninstaller batch files for Windows platforms Benefits The silent uninstallers allow you to automate the uninstallation tasks from another batch script file on Windows platforms Description The new silent uninstaller batch files can be used to remove Abaqus documentation licensing or products The silent uninstallers are available only on Windows platforms Both the Windows uninstall shortcuts and the silent uninstaller batch files generate a log file that you can review The log file indicates whether the uninstall was successful and if you should reboot restart your computer This information is shown in the last two lines of the log file For example Uninstall Status SUCCESS Restart Needed YES RECOMMENDED The Uninstall Status line will indicate either SUCCESS or INCOMPLETE
50. in Eulerian elements Abaqus Scripting Interface Python upgrade Accessing internal sets Summary of changes Changes in Abaqus elements Changes in Abaqus options Changes in Abaqus user subroutines Changes in Abaqus output variable identifiers Product Index xiii CONTENTS 13 1 13 2 13 3 13 4 13 5 13 6 13 7 13 8 13 9 13 10 13 11 13 12 13 13 13 14 13 15 13 16 14 2 14 3 14 4 14 5 14 6 15 1 15 2 16 1 16 2 16 3 16 4 INTRODUCTION TO Abaqus 6 10 1 Introduction to Abaqus 6 10 This document introduces features in Abaqus that have been added enhanced or updated since the Abaqus 6 9 release Some of these features were first available in the Abaqus 6 9 EF release The remaining features are new in Abaqus 6 10 Chapter 1 provides a brief overview of the Abaqus products included in this release Chapters 2 15 provide short descriptions of new Abaqus 6 10 features in Abaqus Standard Abaqus Explicit Abaqus CFD and Abaqus CAE categorized by subject e Chapter 2 General enhancements general changes to the Abaqus interface e Chapter 3 Execution commands and utilities for running any of the Abaqus products e Chapter 4 Modeling features related to creating your model such as node and element definition in Abaqus Standard or Abaqus Explicit and part and assembly definition in Abaqus CAE e Chapter 5 Model import and export features related to importing and exporting parts
51. in previous releases strain free adjustments are made to resolve initial contact overclosures and to resolve initial noncompliance of tie constraints These adjustments are made during preprocessing such that the initial configuration observed with the Visualization module of Abaqus CAE reflects these adjustments The new output variable can be used to create a symbol plot of nodal adjustment vectors or a contour plot of the adjustment magnitudes Abaqus Explicit applies strain free adjustments to the initial nodal displacement rather than to the undeformed configuration Therefore the displacement output variable U at time 0 can be used to visualize strain free adjustments for Abaqus Explicit analyses References Abaqus Analysis User s Manual e Abaqus Standard output variable identifiers Section 4 2 1 e Mesh tie constraints Section 31 3 1 e Controlling initial contact status in Abaqus Standard Section 32 2 4 e Adjusting initial surface positions and specifying initial clearances in Abaqus Standard contact pairs Section 32 3 5 11 5 INTERACTIONS 11 6 User specified interference fit distance and user specified initial clearance distance for general contact Product Abaqus Standard Benefits It is now easier to model a desired interference fit distance or initial clearance distance with general contact in Abaqus Standard Description You can now specify an interference fit distance or initial clearanc
52. individual faces for repair of face normals 4 7 Geometry repair for shells and solid parts that contain multiple cells 4 8 New tools for editing or repairing faces 4 9 Improvements to repair of small edges and small faces 4 10 CONTENTS Automatic validity check after geometry edits 4 11 Stitching gaps in non manifold parts 4 12 Enhanced support in Abaqus CAE for modeling fracture mechanics using XFEM 4 13 Ability to select attachment points for additional modeling tasks 4 14 Enhancements to distributions of orientations 4 15 Expanded use of distributions for shell sections 4 16 Control over individual vector display in continuum shell composite layups 4 17 Enhancements to orientations for material orientations and composite layups 4 18 Querying mass properties for beams and trusses 4 19 Querying for disjoint ply regions 4 20 Querying for regions missing section assignments 4 21 Enhancements to the Datum toolset 4 22 Rendering of shell thickness 4 23 Hiding annotations 4 24 Quick display buttons for all datum geometry viewport annotations free body cuts and attributes 4 25 Specifying the universal gas constant 4 26 5 Model import and export Streamlined part and assembly import from Elysium Neutral files 5 1 Model import from ANSYS input files 5 2 Running CAD software in the background after changes to CAD parameters 5 3 Automatic geometry repair during part import 5 4 Import and export of model data from stereolithography files 5 5 NX a
53. manager Connector section assignments in model databases created prior to Abaqus CAE 6 9 EF will not have tags To generate the tags you must suppress and resume the connector section assignments in Abaqus CAE 6 9 EF or later For Abaqus CAE model databases containing hundreds of connector section assignments this operation can be time consuming The most efficient method of suppressing and resuming the connector section assignments is to enter the following Abaqus Scripting Interface commands in the command line interface at the bottom of the Abaqus CAE main window prior to changing to the Interaction module 11 17 INTERACTIONS gt gt gt for asgmt in db models Model_name rootAssembly sectionAssignments asgmt suppress gt gt gt for asgmt in mdb models Model_name rootAssembly sectionAssignments asgmt resume gt gt gt Abaqus CAE Usage Interaction module Connector Assignment Manager View Assembly Display Options Attribute Connector tag display References Abaqus CAE User s Manual e Editing the region to which an interaction or constraint is applied Section 15 12 12 in the online HTML version of this manual e Controlling the display of attributes Section 73 14 11 17 Coincident Point Builder Product Abaqus CAE Benefits You can now create a connector wire feature for a group of coincident points in your model Description The Coincident Point Builder enables you
54. of the following modeling activities e As the connector points for a connector e As the selected region for a coupling definition point mass load or boundary condition Abaqus CAE Usage Property module or Interaction module Special Inertia Create Point mass select attachment point Interaction module Connector Connector Builder select attachment points Connector Geometry Create Wire Feature select attachment points References Abaqus CAE User s Manual e Creating a single connector Section 15 12 7 in the online HTML version of this manual e Creating or modifying wire features for multiple connectors Section 15 12 8 in the online HTML version of this manual e Creating discrete fasteners Section 28 4 in the online HTML version of this manual e Defining point mass and rotary inertia Section 32 3 in the online HTML version of this manual 4 15 Enhancements to distributions of orientations Products Abaqus Standard Abaqus Explicit Abaqus CAE Benefits You can easily define distributions of orientations on models that use parts and part instances Description You can now define a distribution of orientations at the part or part instance level Abaqus automatically transforms the orientation values from the part s coordinate system into the assembly coordinate system using the part instance transformation 4 13 MODELING Abaqus CAE Usage Property module Interaction module
55. parallel execution in Abaqus Standard to use domain level parallelization in Abaqus Explicit or to run any job in Abaqus CFD regardless of the number of CPUs If your Abaqus users will be running these types of simulations you must have the required MPI components preinstalled or allow the Abaqus installer to install them for you Reference Abaqus Installation and Licensing Guide e Visual C and MPI Libraries Section 2 4 1 2 4 Installation of PDF documentation Benefits The Abaqus documentation installer now installs the PDF versions of all manuals in addition to the HTML online manuals Description There are now several options for installing the documentation and making it available to your Abaqus users e Install HTML and PDF on a server on your network and use web server software to serve both formats to users this is the most common choice GENERAL ENHANCEMENTS e Install multiple copies of the PDF files on individual users machines where they can view it locally using a PDF viewer such as Adobe Acrobat Reader e Skip the documentation installer and simply copy the PDF files from the DVD to any computers or disks The Abaqus PDF documentation is not meant as a replacement for the online HTML format documentation However it has the following advantages e Convenient portable reference e Ability to print a range of pages such as a section or chapter e Higher quality printed output than that available from
56. respect to the party from whom you acquired the software This agreement does not change your rights under the laws of your country if the laws of your country do not permit it to do so 11 Disclaimer of Warranty The software is licensed as is You bear the risk of using it Microsoft gives no express warranties guarantees or conditions You may have additional consumer rights under your local laws which this agreement cannot change To the extent permitted under your local laws Microsoft excludes the implied warranties of merchantability fitness for a particular purpose and non infringement 12 Limitation on and Exclusion of Remedies and Damages You can recover from Microsoft and its suppliers only direct damages up to U S 5 00 You cannot recover any other damages including consequential lost profits special indirect or incidental damages This limitation applies to anything related to the software services content including code on third party Internet sites or third party programs and e claims for breach of contract breach of warranty guarantee or condition strict liability negligence or other tort to the extent permitted by applicable law It also applies even if Microsoft knew or should have known about the possibility of the damages The above limitation or exclusion may not apply to you because your country may not allow the exclusion or limitation of incidental consequential or other damages Please note As this s
57. rule constraints Section 17 20 4 12 5 MESHING Figure 12 3 The effect of specifying the maximum number of elements in the remeshing rule 12 4 Tetrahedral meshing enhancements Product Abaqus CAE Benefits When you create a tetrahedral mesh for solid regions Abaqus CAE first creates a surface mesh of triangular elements and then uses this mesh to fill the solid with tetrahedral elements The tetrahedral meshing process has been enhanced with changes to both the initial surface mesh and the resulting tetrahedral mesh The enhancements improve the mesh quality memory use and processing requirements of the tetrahedral meshing process Description Several enhancements have been made to improve the robustness of both the triangular surface mesh and the resulting tetrahedral mesh The enhancements do not change the user interface however they improve the speed memory use and success rate of tetrahedral meshing especially when meshing large or complex parts Some of the enhancements include reducing potential folded mesh errors excessive loss of curvature and mesh intersections in the triangular mesh In addition the default quadratic tetrahedral element for Abaqus Standard in the Element Type dialog box has been changed from C3D10M to C3D10 Abaqus CAE Usage Mesh module Mesh Controls Tet Mesh Element Type Element Library Standard Geometric Order Quadratic Tet tabbed page References Abaqus CAE User s Manual
58. running improves performance for subsequent parameter updates If you leave CAD software running in the background your session will occupy a license for the selected CAD application for the duration of your session Bidirectional parameter update is currently available only for the Pro ENGINEER Associative Interface MODEL IMPORT AND EXPORT Abaqus CAE Usage Part module Tools CAD Parameters Keep CAD software running in the background after parameter update Assembly module Tools CAD Interfaces CAD Parameters Keep CAD software running in the background after parameter update Reference Abaqus CAE User s Manual e Updating geometry parameters in an imported model Section 58 2 5 4 Automatic geometry repair during part import Product Abaqus CAE Benefits Abaqus CAE can now repair part geometry automatically when you import a part from a file created by another CAD application This enhancement enables you to improve the validity of the imported part using several repair tools and validity checks Description If invalid geometry is detected during the import of one or more parts Abaqus CAE now prompts you to perform an automated repair of the invalid geometry at the end of the import process The automated repair consists of a series of geometry repair steps and validity checks that can improve the validity of the part After the automated repair is complete Abaqus CAE creates an auto repair feature for the part und
59. s Manual e Defining substructures Section 10 1 2 Abaqus Keywords Reference Manual e SELECT EIGENMODES e SUBSTRUCTURE GENERATE 6 13 Enhancements to coupled structural acoustic analysis Product Abaqus Standard Benefits Performance is improved and enhanced functionality is available in coupled structural acoustic steady state dynamic analyses ANALYSIS PROCEDURES Description You can perform coupled structural acoustic steady state dynamic analysis following Lanczos eigenvalue extraction using the new high performance architecture You can request residual mode calculation in coupled structural acoustic Lanczos eigenvalue extraction analysis In this case the residual vectors are computed only over the structural domain Including residual modes improves the accuracy of the modal procedures In addition the performance of subspace based coupled structural acoustic steady state dynamic analysis based on coupled Lanczos modes is improved In a particular application where about 2 650 coupled modes were used the analysis time was reduced 25 times from 40 hours to hour 35 minutes References Abaqus Analysis User s Manual e Using the SIM architecture for modal superposition dynamic analyses in Dynamic analysis procedures overview Section 6 3 1 e Mode based steady state dynamic analysis Section 6 3 8 e Subspace based steady state dynamic analysis Section 6 3 9 e Acoustic shock and cou
60. shell thickness and Scale factor Visualization module View ODB Display Options Render shell thickness and Scale factor References Abaqus CAE User s Manual e Controlling shell thickness display Section 53 11 6 for plot display e Controlling shell thickness display Section 73 7 for geometry and mesh display 4 24 Hiding annotations Product Abaqus CAE 4 19 MODELING Benefits You can now hide viewport annotations using the Annotation Manager and the Model Tree contextual menus Description The Annotation Manager now includes a Hide button allowing you to easily hide selected annotations in the current viewport In addition you can select annotations in the Model Tree click mouse button 3 and use the contextual menu that appears to hide annotations or to plot hidden annotations Abaqus CAE Usage All modules Viewport Annotation Manager References Abaqus CAE User s Manual e Manipulating annotations in the current viewport Section 4 4 5 in the online HTML version of this manual e Plotting annotations in the current viewport Section 4 4 8 in the online HTML version of this manual 4 25 Quick display buttons for all datum geometry viewport annotations free body cuts and attributes Benefits You can now quickly display or hide all datum geometry all attributes all free body cuts or all viewport annotations with a single click These enhancements streamline modeling display
61. supports heat transfer analysis for free body cuts displayed on view cuts Description Abaqus CAE now supports the following enhancements to free body cut functionality e Continuum shells in your model are now included in calculations of resultant force and moment for free body cuts displayed on view cuts e You can also report data from free body cuts either in the global coordinate system or in the local coordinate systems for which they were defined e Abaqus CAE now supports heat transfer analysis for free body cuts displayed on view cuts Abaqus CAE Usage Visualization module Report Free Body Cut Local CSYS Options View Cut Free Body tabbed page Show heat flow rate if available References Abaqus CAE User s Manual e Controlling report layout width format and coordinate system Section 52 5 in the online HTML version of this manual e Customizing free body display on the active view cut Section 77 2 8 in the online HTML version of this manual 13 15 Calculation of contour limits based on all frames in an animation Product Abaqus CAE Benefits Abaqus CAE can now calculate the contour limits for an animation based on results in all frames of the animation This enhancement expands the options available for auto computing contour limits 13 13 OUTPUT AND VISUALIZATION Description The Use limits from all frames option in the Contour Plot Options dialog box enables you to auto compute the co
62. the software 5 DOCUMENTATION Any person that has valid access to your computer or internal network may copy and use the documentation for your internal reference purposes Export Restrictions The software is subject to United States export laws and regulations You must comply with all domestic and international export laws and regulations that apply to the software These laws include restrictions on destinations end users and end use For additional information see www microsoft com exporting 7 SUPPORT SERVICES Because this software is as is we may not provide support services for it 8 Entire Agreement This agreement and the terms for supplements updates Internet based services and support services that you use are the entire agreement for the software and support services 9 Applicable Law a United States If you acquired the software in the United States Washington state law governs the interpretation of this agreement and applies to claims for breach of it regardless of conflict of laws principles The laws of the state where you live govern all other claims including claims under state consumer protection laws unfair competition laws and in tort b Outside the United States If you acquired the software in any other country the laws of that country apply 10 Legal Effect This agreement describes certain legal rights You may have other rights under the laws of your country You may also have rights with
63. to change the allowable elastic slip during a step CLAY HARDENING This option can now be used in Abaqus Explicit to define piecewise linear hardening softening of the Cam clay plasticity yield surface CLAY PLASTICITY This option can now be used in Abaqus Explicit to specify the plastic part of the material behavior for elastic plastic materials that use the Cam clay plasticity model CLOAD In steady state dynamic analysis the LOAD CASE parameter has been replaced by the REAL and IMAGINARY parameters to define real and imaginary loading CONDUCTIVITY The new PORE FLUID parameter has been added to allow specification of the thermal conductivity of the pore fluid in a geostatic or soils consolidation analysis that models heat transfer in a fully coupled manner with the pore fluid flow and the mechanical deformations CONNECTOR LOAD In steady state dynamic analysis the LOAD CASE parameter has been replaced by the REAL and IMAGINARY parameters to define real and imaginary loading CONNECTOR MOTION In steady state dynamic analysis the LOAD CASE parameter has been replaced by the REAL and IMAGINARY parameters to define real and imaginary loading CONTACT CLEARANCE The SEARCH NSET parameter can now be used to identify initially bonded nodes in a crack propagation analysis using the VCCT criterion 16 3 5 SUMMARY OF CHANGES mod S E mod S mod S new S mod S new E mod S E CONTACT FORMULATIO
64. yield surface and flow potential parameters for elastic plastic materials that use the Mohr Coulomb plasticity model mod E MOHR COULOMB HARDENING This option can now be used in Abaqus Explicit to define piecewise linear hardening softening behavior for a material defined by the Mohr Coulomb plasticity model mod E NODAL ENERGY RATE This option can now be used in Abaqus Explicit to define the variable critical energy release rates for a crack propagation analysis using the VCCT criterion 16 9 5 SUMMARY OF CHANGES mod S mod S mod S mod S mod S new E mod E mod E mod S mod S mod S PLASTIC You can now set HARDENING JOHNSON COOK to specify Johnson Cook hardening in an Abaqus Standard analysis PRESSURE PENETRATION In steady state dynamic analysis the LOAD CASE parameter has been replaced by the REAL and IMAGINARY parameters to define real and imaginary loading PRINT The default value for the SOLVE parameter is now YES RADIATION VIEWFACTOR Use the new INFINITESIMAL INTEGRATION and LUMPED AREA parameters to customize the accuracy and speed of viewfactor calculations RATE DEPENDENT You can now set TYPE JOHNSON COOK to specify Johnson Cook rate dependence in an Abaqus Standard analysis REACTION RATE Define the reaction rate for an ignition and growth equation of state SHELL GENERAL SECTION You can now define distributions of composite layer angles and shel
65. you to display shell geometry with its actual thickness during modeling and postprocessing This enhancement provides a better visual representation of models that contain shell geometry Description You can now display the thickness of shell sections in your model by toggling on the Render shell thickness option Shell thickness rendering is available for applicable parts and assemblies and is available in the Visualization module for all plot states By default Abaqus CAE renders shell thickness at the scale specified in your model however you can change the Scale factor setting for shell thickness to increase or reduce the display of relative thickness for shell geometry Figure 4 7 shows the effect of changing the shell thickness scale factor on a contour plot For contour plots Abaqus CAE displays shell sections with contour values that are based on the currently active section points If the top section point or bottom section point is currently active Abaqus CAE displays the contour for that section point throughout the shell thickness If both top and bottom section points are currently active Abaqus CAE creates a contour gradient through the shell thickness 4 18 MODELING Figure 4 7 From left to right shell thickness scale factor settings of 0 5 1 default and 2 Abaqus CAE Usage Part module View Part Display Options Render shell thickness and Scale factor Assembly module View Assembly Display Options Render
66. 0 Enhancements to complex eigenvalue extraction analysis Product Abaqus Standard Benefits Enhanced functionality and improved performance are now available in complex eigenvalue extraction analysis Description You can now perform complex eigenvalue extraction analysis using the high performance SIM architecture SIM based complex eigenvalue extraction analysis offers the following benefits 6 22 ANALYSIS PROCEDURES e structural damping including damping defined with viscoelastic materials is taken into account e modal damping can be specified e matrices representing the stiffness mass and damping can be defined e the AMS eigensolver can be used to generate the projection subspace for the complex eigenvalue extraction and e the analysis time is reduced significantly References Abaqus Analysis User s Manual e Complex eigenvalue extraction Section 6 3 6 Abaqus Keywords Reference Manual e COMPLEX FREQUENCY 6 21 Enhancement to the geostatic and soils consolidation capabilities to model coupled heat transfer Product Abaqus Standard Benefits You can now model heat transfer in a fully coupled manner with pore fluid flow and mechanical deformation in porous media such as soil In previous releases thermal coupling had to be accounted for in a sequential manner which involved solving a heat transfer analysis to solve for the temperature field followed by a consolidation analysis with the precomputed tempe
67. 24 CCL24H CCL24R and CCL24RH Only hex or wedge shaped cylindrical elements are available there are no applicable tetrahedral element types in this family In addition you can assign cylindrical elements only to cells for which swept meshing is specified Abaqus CAE Usage Mesh module Mesh Element Type Family Cylindrical References Abaqus Analysis User s Manual e Cylindrical solid element library Section 25 1 5 Abaqus CAE User s Manual e Element type assignment Section 17 5 3 8 2 Coupled temperature pore pressure elements in Abaqus Standard Product Abaqus Standard 8 1 ELEMENTS Figure 8 1 Threaded connector model meshed with solid cylindrical elements Benefits You can now model heat transfer in a fully coupled manner with pore fluid flow and mechanical deformation in porous media such as soil In previous releases thermal coupling had to be accounted for in a sequential manner which involved solving a heat transfer analysis to solve for the temperature field followed by a consolidation analysis with the precomputed temperature specified as a predefined field Description Coupled temperature pore pressure elements are similar to existing pore pressure elements with the important difference that they have temperature as a nodal degree of freedom in addition to pore pressure and displacement The element formulation solves the heat transfer equation in addition to and in a fully coupled m
68. 3 2 in the online HTML version of this manual e Defining contact in Eulerian Lagrangian models Section 27 3 11 2 INTERACTIONS 11 2 Pressure penetration in Abaqus CAE Product Abaqus CAE Benefits You can now define pressure penetration interactions in Abaqus CAE This enhancement increases the coverage and ease of use of product functionality within Abaqus CAE Description Abaqus CAE now provides support for pressure penetrations in the Interaction module as shown in Figure 11 2 Pressure penetration interactions can be applied only in a planar or axisymmetric model not in a three dimensional model E Edit Interaction xj Name Int 3 Type Pressure penetration Planar Axisymmetric Step Step 3 Static General Contact Interaction Contact interaction fint 1 7 Master surface Surf 1 Hl Slave surface Surf 2 E M Penetration Points EFF Fluid Pressure Point on Point on Critical Contact Master Picked Picked Picked Picked 0 2 5 Penetration time 0 001 Amplitude Ramp v Create x Cancel Figure 11 2 Defining a pressure penetration interaction A pressure penetration interaction allows you to simulate the pressure of a fluid penetrating between two surfaces involved in surface to surface contact The fluid pressure is applied normal to the surfaces The surfaces are modeled as master and slave contact surfaces in a surface to surface contact in
69. 3 7 in the online HTML version of this manual e Defining a model change interaction Section 15 13 10 in the online HTML version of this manual e Viewing removed elements Section 53 11 7 11 9 VCCT in Abaqus Explicit Product Abaqus Explicit Benefits You can now model brittle fracture of initially partially bonded surfaces using the Virtual Crack Closure Technique in Abaqus Explicit Description The already existing Abaqus Standard capability is now available in three dimensional analyses in the context of general contact cohesive behavior in Abaqus Explicit It allows for modeling of brittle failure using linear elastic fracture mechanics principles for crack propagation along predetermined 11 9 INTERACTIONS surfaces in cases where the initial crack front is known It can be used in conjunction with cohesive elements to model additional ductile failure interactions on the debonding interface References Abaqus Analysis User s Manual e Abaqus Explicit output variable identifiers Section 4 2 2 e Crack propagation analysis Section 11 4 3 e Controlling initial contact status for general contact in Abaqus Explicit Section 32 4 4 e Surface based cohesive behavior Section 33 1 10 Abaqus Keywords Reference Manual e COHESIVE BEHAVIOR e CONTACT CLEARANCE e FRACTURE CRITERION Abaqus Example Problems Manual e Debonding behavior of a double cantilever beam Section 1 4 7 e Debonding
70. 46 4413 0 30 Model 4 4 3 1715 3 07 1709 0 55 Model 5 9 2 4221 5 45 4206 1 25 Due to these enhancements and the approximate nature of the AMS technology it is possible to observe slight differences in the number of eigenmodes extracted by AMS in Abaqus 6 10 versus Abaqus 6 9 EF and compared to previous releases These differences are expected since AMS eigenmodes close to the user specified maximum frequency are generally less accurate and more sensitive to some perturbations e g changes in the order of the system of equations However the results of subsequent modal dynamic procedures are very close to the results in Abaqus 6 9 EF and previous releases if an appropriate number of modes is used to construct the projection basis ANALYSIS PROCEDURES References Abaqus Analysis User s Manual e Natural frequency extraction Section 6 3 5 Abaqus Keywords Reference Manual e FREQUENCY 6 17 Random response analysis based on the SIM architecture Product Abaqus Standard Benefits You can now run a random response analysis following a frequency extraction step using the high performance SIM architecture Description A random response analysis can be run using modes from the high performance SIM architecture In addition the performance of the random response procedure has been substantially improved for large models under nodal elemental loads and or moving noise correlation References Abaqus Ana
71. EME and SCHEME MODIFIER parameters are available for specifying coupling behavior when using the CO SIMULATION PROGRAM MULTIPHYSICS option Use the new FACTORIZATION FREQUENCY parameter in an Abaqus Standard analysis to control the frequency of the interface matrix factorization mod S DAMAGE INITIATION When the crack is modeled as an enriched feature with the extended finite element method four new damage initiation criteria are supported Set CRITERION QUADE to specify a damage initiation based on the quadratic separation interaction criterion Set CRITERION QUADS to specify a damage initiation based on the quadratic traction interaction criterion Set CRITERION MAXE to specify a damage initiation based on the maximum nominal strain criterion Set CRITERION MAXS to specify a damage initiation based on the maximum nominal stress criterion Use the new NORMAL DIRECTION parameter to specify the crack propagation direction for enriched elements when one of the four crack initiation criteria mentioned above is satisfied mod S DAMPING CONTROLS This option can now be used with the MATRIX GENERATE and SUBSTRUCTURE GENERATE options If the STRUCTURAL parameter is omitted or the option is not used as a suboption of SUBSTRUCTURE PROPERTY the substructure property uses COMBINED as the default with the structural factor specified under the DAMPING STRUCTURAL option 16 5 5 SUMMARY OF CHANGES mod S mod S mod S mo
72. I IS PROVIDED AS IS AND WITHOUT ANY WARRANTY DASSAULT SYSTEMES ITS SUBSIDIARIES AND HP SPECIFICALLY DISCLAIM ANY AND ALL WARRANTIES EXPRESS OR IMPLIED INCLUDING ANY WARRANTIES OF NON INFRINGEMENT OR OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE IN NO EVENT SHALL DASSAULT SYSTEMES ITS SUBSIDIARIES OR HP BE LIABLE FOR ANY DIRECT INDIRECT INCIDENTAL PUNITIVE SPECIAL OR CONSEQUENTIAL DAMAGE INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF BUSINESS PROFITS BUSINESS INTERRUPTION OR LOSS OF BUSINESS INFORMATION ARISING FROM USE OR ATTEMPTED USE OF HP MPI EVEN IF DASSAULT SYSTEMES ITS SUBSIDIARIES OR HP HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES MS MPI LICENSE TERMS MS MPI is included with this release of Abaqus software MS MPI is an implementation from Microsoft Corporation Microsoft of the Message Passing Interface standard that may be used for parallel execution of Abaqus Standard Abaqus Explicit and Abaqus CFD MS MPI is the property of Microsoft and is not an Abaqus Program Under a license from Microsoft to Dassault Systemes Simulia Corp MS MPI is made available to licensed Abaqus users at no additional charge You are a licensed Abaqus user if you are authorized to use Abaqus software under a software license agreement between Dassault Systemes or its subsidiary and the business governmental or academic entity with which you are associated If you are a licensed Abaqus user you may obtain MS MPI
73. MPI is an implementation from Hewlett Packard Company HP of the Message Passing Interface standard that may be used for parallel execution of Abaqus Standard Abaqus Explicit and Abaqus CFD HP MPI is the property of HP and is not an Abaqus Program Under a license from HP to Dassault Systemes Simulia Corp HP MPI is made available to licensed Abaqus users at no additional charge You are a licensed Abaqus user if you are authorized to use Abaqus software under a software license agreement between Dassault Systemes or its subsidiary and the business governmental or academic entity with which you are associated If you are a licensed Abaqus user you may obtain HP MPI under a license directly from HP or you may proceed as described in the Installation Instructions for Abaqus Programs without entering into a separate license with HP If you choose to install HP MPI as made available by Dassault Syst mes or its subsidiary use and reproduction of HP MPI by your business governmental or academic entity will be subject to the same restrictions as are in the license agreement with your business governmental or academic entity that govern the use of Abaqus software and will be terminable by Dassault Syst mes or its subsidiary on the same conditions as are in the Abaqus software license agreement However HP MPI is NOT an Abaqus Program and is NOT warranted or supported by Dassault Syst mes or its subsidiaries Without limiting the foregoing HP MP
74. N Two new values are available for the TYPE parameter Set TYPE SLIDING TRANSITION to control the smoothness of the surface to surface formulation upon sliding for specific interactions in Abaqus Standard Set TYPE POLARITY to choose which sides of double sided elements will be considered for node to face or Eulerian Lagrangian contact with another surface in Abaqus Explicit CONTACT INITIALIZATION DATA Set the new INITIAL CLEARANCE parameter equal to a positive value to specify an initial clearance distance Include the INTERFERENCE FIT parameter without setting it to a value to treat initial overclosures as interference fits Set this parameter equal to a positive value to specify an interference distance If this parameter is omitted initial overclosures are resolved with strain free adjustments Set the SEARCH ABOVE parameter equal to a positive value to ensure that the search zone for contact initialization includes gaps at least as large as the specified value Set the SEARCH BELOW parameter equal to a positive value to ensure that the search zone for contact initialization includes overclosures at least as large as the specified value CONTACT PAIR Use the new MIDFACE NODES parameter to indicate if you want to automatically convert most three dimensional second order element types with no midface node serendipity elements that form a slave surface of a surface to surface contact pair into elements with a midface node Use the n
75. The model change interaction editor is shown in Figure 11 4 A new toggle on the surface to surface contact and self contact editors allows you to deactivate and reactivate contact pairs in analysis steps Abaqus CAE allows you to control the visibility of deactivated regions in the Visualization module The display of the deactivated regions is dependent on the status of the new visibility toggle and on the plot state used in the viewport Abaqus CAE Usage Interaction module Interaction Create Model change Interaction Edit surface to surface contact or self contact interaction editor Active in this step Visualization module View ODB Display Options toggle Account for deactivated elements 11 8 INTERACTIONS W Edit Interaction x Name Int 1 Type Model change Step Step 1 Static General Definition Region Restart Region type Elements Region Picked Edit Activation state of region elements Deactivated in this step Reactivated in this step I Reactivate elements with strain when applicable OK Cancel Figure 11 4 Model change interaction editor References Abaqus Analysis User s Manual e Output Section 4 1 1 e Element and contact pair removal and reactivation Section 11 2 1 Abaqus CAE User s Manual e Defining surface to surface contact Section 15 13 6 in the online HTML version of this manual e Defining self contact Section 15 1
76. User s Manual e Combining data from multiple output databases Section 3 2 18 Abaqus CAE User s Manual e Combining data from multiple output databases Section 79 13 in the online HTML version of this manual 13 9 Finding the nearest node to a point Product Abaqus CAE Benefits The Find Nearest Node plug in allows you to easily locate the node that is nearest to a given point in a meshed model or undeformed plot Description You enter the x y and z coordinates of any point in the Find Nearest Node plug in shown in Figure 13 5 and Abaqus CAE shows you the closest node in your meshed model or undeformed plot In addition you can optionally limit the search to a particular region of the model which is useful in large models Abaqus CAE Usage Mesh module or Visualization module Plug ins Tools Find Nearest Node Reference Abaqus CAE User s Manual e Finding the nearest node to a point Section 79 14 in the online HTML version of this manual 13 10 Finding the average temperature of a set of elements Product Abaqus CAE 13 8 OUTPUT AND VISUALIZATION Ml Find Nearest Node x M Point Coordinates Coordinate x i Coordinate y Coordinate z Select Nodes for Reduced Search Find Dismiss Figure 13 5 The Find Nearest Node plug in Benefits The Volume Weighted Average Temperature plug in lets you calculate the average temperature for all elements or an
77. YNAMIC Use the new APPLICATION parameter to choose a general time integration method based on the nature of the analysis you are performing Several other parameters have been added or revised to allow fine control over the time integration scheme for dynamic analyses ELASTIC Use the new TYPE SHEAR value to define the shear modulus of the material This option replaces the EOS SHEAR TYPE ELASTIC option 16 6 mod E rem E new E mod E mod S mod S mod E SUMMARY OF CHANGES EOS A new value is available for the TYPE parameter Set TYPE IGNITION AND GROWTH for an ignition and growth equation of state Use the new DETONATION ENERGY parameter to specify the energy of detonation for an ignition and growth equation of state EOS SHEAR This option has been replaced by the ELASTIC TYPE SHEAR option to define shear elastic behavior and by the VISCOSITY option to define the shear viscosity of the material EULERIAN MESH MOTION Define the motion of an Eulerian mesh EULERIAN SECTION Use the new ADVECTION parameter to specify a first order or second order default advection algorithm to remap solution variables after remeshing has been performed Set the new FLUX LIMIT RATIO parameter equal to the ratio between the maximum distance a node is allowed to move during one increment and the characteristic length of the Eulerian element containing the node EXPANSION Use the new FIELD parameter to i
78. abels in the input file Editing the mesh of a dependent part instance Selecting by feature edge Mesh retained on native parts upon model database upgrade Element nodal forces in beam section orientations PSD and RMS Mises stress contour and history plots from random response analysis Isosurface contour type for contour plots Allowing for multiple view cuts Interpolated values on cut surfaces for symbol plots Improved control over arrow color and display in symbol plots Combining data from multiple output databases Finding the nearest node to a point Finding the average temperature of a set of elements New output variables for connectors Field output for connectors Improvements to filtered field output Enhancements to free body cuts Calculation of contour limits based on all frames in an animation Total time display for time history animation New location option for saving plug ins created with the Really Simple GUI RSG Dialog Builder Utility routine to obtain the volume fraction in Eulerian elements Python upgrade Accessing internal sets Abaqus AMS Section 6 16 AMS eigensolver performance improvements About SIMULIA SIMULIA is the Dassault Systemes brand that delivers a scalable portfolio of Realistic Simulation solutions including the Abaqus product suite for Unified Finite Element Analysis multiphysics solutions for insight into challenging engineering problems and lifecycle management solutions for manag
79. able at http www simulia com locations locations html CONTENTS Contents 1 Introduction to Abaqus 6 10 Key features of Abaqus 6 10 1 1 Abaqus products 1 2 Enhancements to the Abaqus environment file 1 3 Changes in interpretation of input data 1 4 2 General enhancements Silent uninstaller batch files for Windows platforms 2 1 Upgrade of Microsoft Visual C runtime libraries 2 2 Installation of MPI libraries for parallel execution on Windows 2 3 Installation of PDF documentation 2 4 Performance improvements in Abaqus CAE 25 Usability enhancements in Abaqus CAE 2 6 Using wildcard characters for file selection 2 7 Enhancements to overlay plots 2 8 Linking field output across viewports 2 9 Accessing plot display customization options from the Visualization module toolbox 2 10 3 Execution Parallel ordering for the direct sparse solver 3 1 Thread parallel element and contact search calculations for implicit dynamic analyses 3 2 Thread parallel element operations for quasi static analyses 3 3 Double precision constraint solving within a single precision Abaqus Explicit execution 3 4 Enhanced support for translation of Nastran bulk data files 3 5 Dynamic load balancing for domain level parallel execution 3 6 4 Modeling Model types in Abaqus CAE 4 1 Midsurface modeling 4 2 View cuts in Abaqus CAE 4 3 Modeling enhancements for Abaqus CFD 4 4 Topology tracking in the Sketcher 4 5 Three dimensional sweep paths for swept features 4 6 Selection of
80. ad parallel execution scheme multiple threads may all return the rank of their parent MPI process Utility routines VGETNUMCPUS and VGETRANK can be called from any Abaqus Explicit user subroutine in a domain parallel run VGETNUMCPUS provides the number of processes used for the parallel run and VGETRANK provides the individual process rank References Abaqus Analysis User s Manual e Parallel execution in Abaqus Standard Section 3 5 2 e Parallel execution in Abaqus Explicit Section 3 5 3 Abaqus User Subroutines Reference Manual e Obtaining parallel processes information Section 2 1 4 14 5 New location option for saving plug ins created with the Really Simple GUI RSG Dialog Builder Product Abaqus CAE 14 3 USER SUBROUTINES UTILITIES AND PLUG INS Benefits You can now save plug ins created with the RSG Dialog Builder to either the home directory or the current working directory Description In previous releases of Abaqus CAE plug ins created with the RSG Dialog Builder were always saved in your home directory You now have the option to save these plug ins in the current directory In either case your plug ins are saved under the abaqus_ plugins directory and you can specify a subdirectory as shown in Figure 14 1 MM Save Plug in xj Save As RSG plug in Standard plug in i Names Directory name myplugins Menu button name new _widget M Location C Home
81. al e Miscellaneous submodeling tests Section 3 6 17 6 19 Enhancements to the geostatic procedure Products Abaqus Standard Abaqus CAE Benefits The geostatic procedure for obtaining the initial equilibrium state has been enhanced so that you no longer have to specify initial stresses that are close to the equilibrium state to obtain a solution corresponding to the original configuration Description The geostatic procedure is normally used as the first step of a geotechnical analysis in such cases gravity loads and possibly other types of loads are applied during this step Ideally the loads and initial stresses should exactly equilibrate and produce zero deformations However in previous releases of Abaqus the geostatic procedure did not enforce this condition In complex problems it may be difficult to specify initial stresses and loads that equilibrate exactly Consequently the displacements corresponding to the equilibrium solution might be large unless a special procedure is used to enforce small displacements The enhanced geostatic procedure allows you to obtain equilibrium in cases when the initial stress state is unknown or is known only approximately Abaqus automatically computes the equilibrium corresponding to the initial loads and the initial configuration allowing only small displacements within user specified tolerances The procedure is available with continuum and cohesive elements with pore pressure degrees of free
82. al Abaqus Keywords Reference Manual e SOLVER CONTROLS e STEP 6 5 Dynamics enhancements Products Abaqus Standard Abaqus CAE Benefits Algorithmic changes and new controls for the general direct integration dynamic procedure broaden the applicability of this procedure type ANALYSIS PROCEDURES Description Various algorithmic changes have made the general direct integration dynamic procedure more broadly applicable For example this procedure is now effective for many applications that involve contact especially if an energy dissipation mechanism such as plastic yielding or viscous damping is present You are encouraged to provide a high level classification of the application type so that appropriate numerical settings are applied Settings are predefined for the following application types e Transient fidelity applications such as an analysis of satellite systems use small time increments to accurately resolve the vibrational response of the structure and numerical energy dissipation is kept at a minimum e Moderate dissipation applications including various insertion impact and forming analyses use some energy dissipation via plasticity viscous damping or numerical effects to reduce solution noise and improve convergence behavior without significantly degrading solution accuracy e Quasi static applications introduce inertia effects primarily to regularize unstable behavior in analyses whose main focus is a final
83. al e Defining general contact interactions in Abaqus Standard Section 32 2 1 e Controlling initial contact status in Abaqus Standard Section 32 2 4 Abaqus Keywords Reference Manual e CONTACT INITIALIZATION ASSIGNMENT e CONTACT INITIALIZATION DATA 11 7 Contact stabilization controls for general contact Product Abaqus Standard Benefits It is possible to specify local contact stabilization settings for general contact in Abaqus Standard Description Previously contact stabilization specifications for general contact could only be made globally An option is now provided that enables local assignments of contact stabilization for general contact Contact 11 6 INTERACTIONS Original mesh geometry After strain free adjustments Middle of step End of step Figure 11 3 Sequence of configurations for an example with a specified interference distance h stabilization improves convergence behavior for many situations such as when small separation between some assembly components exists prior to establishing contact Contact stabilization is not activated by default in most cases but many analyses can benefit from its usage When activated numerical controls associated with contact stabilization are set quite conservatively by default such as to minimize the risk of degrading accuracy Based on your understanding of potential unstable modes in a model you may be able to use more aggressive 11 7 INTERACTIONS
84. alyses with XFEM Abaqus CAE Usage Property module Material editor Mechanical Damage for Traction Separation Laws Quade Damage Maxpe Damage Quads Damage or Maxps Damage Interaction module Contact interaction property editor Mechanical Fracture Criterion Direction of crack growth relative to local 1 direction References Abaqus Analysis User s Manual e Modeling discontinuities as an enriched feature using the extended finite element method Section 10 6 1 ANALYSIS PROCEDURES Abaqus CAE User s Manual e Specifying fracture criterion properties for crack propagation in enriched elements in Defining a contact interaction property Section 15 14 1 in the online HTML version of this manual e Using the extended finite element method to model fracture mechanics Section 30 3 Abaqus Keywords Reference Manual e DAMAGE INITIATION e ENRICHMENT e FRACTURE CRITERION Abaqus Benchmarks Manual e Crack propagation of a single edge notch simulated using XFEM Section 1 19 1 e Crack propagation in a plate with a hole simulated using XFEM Section 1 19 2 e Crack propagation in a beam under impact loading simulated using XFEM Section 1 19 3 e Dynamic shear failure of a single edge notch simulated using XFEM Section 1 19 4 6 8 Enhancements in Abaqus Standard to Abaqus Explicit co simulation Products Abaqus Standard Abaqus Explicit Abaqus CAE Benefits You can define a
85. and postprocessing activities Description Abaqus CAE includes new buttons that enable you to perform the following changes to the display options e You can display or hide all datum geometry in the current part or assembly e You can display or hide all attributes in the current assembly e You can display or hide all free body cuts e You can display or hide all viewport annotations in the current viewport Abaqus CAE Usage Part related modules View Part Display Options Datum tabbed page Show all datums and Show no datums Assembly related modules View Assembly Display Options Datum tabbed page Show all datums and Show no datums Assembly tabbed page Set all on and Set all off Visualization module Tools Free Body Cut Manager Set All On and Set All Off 4 20 MODELING All modules Viewport Viewport Annotation Options General tabbed page Set all on and Set all off References Abaqus CAE User s Manual e Overview of viewport annotation options Section 54 4 in the online HTML version of this manual e Displaying hiding and highlighting free body cuts Section 65 4 in the online HTML version of this manual e Controlling datum display Section 73 8 e Controlling the display of attributes Section 73 14 4 26 Specifying the universal gas constant Product Abaqus CAE Benefits You can now define the universal gas constant in Abaqus CAE which increases the coverage of Abaq
86. and set controls in the Verify Mesh dialog box The ability to create geometry sets has also been added to the Free Non manifold edges and Mesh gaps intersections queries Previously you could save only an element set with the results from these queries The new Unmeshed regions query locates any model regions that need to be meshed If there are unmeshed regions that should be meshed Abaqus CAE highlights them in the viewport and displays a warning dialog box The dialog box contains controls that allow you to create a set containing the highlighted unmeshed regions If there are no unmeshed regions or if the only unmeshed regions do not require a mesh for example analytical rigid surfaces or display bodies Abaqus CAE indicates in the message area that all regions are fully meshed All highlighted viewport results are now recognized by the display group tools For example you can use Replace Selected to remove all regions except those that need to be meshed For more information about display groups see Chapter 75 Using display groups to display subsets of your model in the Abaqus CAE User s Manual Abaqus CAE Usage Mesh module Mesh Verify Analysis Checks toggle Errors and or Warnings toggle on Create set to create a set containing the highlighted results 12 3 MESHING Tools Query Unmeshed regions Tools Query Mesh gaps intersections or Free Non manifold edges References Abaqus CAE User s Manual e
87. anner with mechanical equilibrium and continuity equations The formulation is important in situations where there is a strong coupling between pore fluid flow and heat transfer and the temperature field has a relatively strong dependence on the stresses and the pore pressure For example changes in the pore pressure may affect the flow rates which in turn may affect the temperature distribution due to the modified convection rates Although these elements assume by default that nodal temperature is an active degree of freedom they can be used in a pure consolidation analysis without heat transfer effects by turning off the temperature degrees of freedom The element library includes first order brick second order modified tetrahedron and first order axisymmetric formulations The thermal material properties that govern the heat transfer behavior can be independently specified for both the solid and the pore fluid phases ELEMENTS References Abaqus Analysis User s Manual Three dimensional solid element library Section 25 1 4 Axisymmetric solid element library Section 25 1 6 Abaqus Keywords Reference Manual CONDUCTIVITY DENSITY EXPANSION GEOSTATIC LATENT HEAT SOILS SPECIFIC HEAT Abaqus Example Problems Manual Permafrost thawing pipeline interaction Section 10 1 6 Abaqus Benchmarks Manual The one dimensional thermal consolidation problem Section 1 15 6 Consolidation around a cylindrica
88. ant to import parts or assemblies from an Elysium Neutral file and you are unsure whether the file was generated by I DEAS NX Pro ENGINEER or CATIA V5 The CATIA V5 import is intended for legacy translator files Description The Import Part and Import Assembly dialog boxes now include a single option that enables you to import parts or assemblies from Elysium Neutral en files Using one option for part import or assembly import from Elysium Neutral files enables you to import data without having to determine whether your source file was generated by I DEAS NX Pro ENGINEER or CATIA V5 Abaqus CAE examines the selected file and tailors the part or assembly import process accordingly Abaqus CAE Usage All modules File Import Part File Filter ProE NX IDEAS CATIA V5 Elysium Neutral enf File Import Assembly File Filter ProE NX IDEAS CATIA V5 Elysium Neutral enf References Abaqus CAE User s Manual e Importing a part from an Elysium Neutral file Section 10 7 6 in the online HTML version of this manual e Importing an assembly from an Elysium Neutral file Section 10 7 15 in the online HTML version of this manual 5 1 MODEL IMPORT AND EXPORT 5 2 Model import from ANSYS input files Products Abaqus Standard Abaqus Explicit Abaqus CAE Benefits You can now import model data from an ANSYS input file into Abaqus This new capability is available from the command line and from the model i
89. applying bias seeding single or double you can now reverse the direction of the bias along the selected edges With previous releases of Abaqus CAE you could apply curvature control to allow for small holes or regions of high curvature only when generating mesh seeding over an entire part or instance You can now apply the same curvature control when you are seeding selected edges faces and cells With previous releases of Abaqus CAE the default seed constraint allowed the number of elements to increase or decrease The default seed constraint now allows the number of elements to increase only In addition to applying seeds to a selected set you can now apply seeds to a selected surface 12 7 MESHING e After you have selected the regions edges faces and cells to seed you can save your selection in a set If you subsequently want to change the seeding you can select the set without having to reselect the individual edges faces and cells e If you select regions that have already been seeded with a mixture of seeding parameters such as curvature control settings bias selection and constraints you can generate seeds on the selected regions while retaining the original seeding parameters Figure 12 5 shows the new Local Seeds dialog box and the controls for specifying biased seeding W Local Seeds x Basic Constraints Method 1 Bias By size C None Single Double By number Sizing Controls Mi
90. aqus CAE User s Manual e Defining elasticity Section 12 9 1 in the online HTML version of this manual Abaqus Keywords Reference Manual e DRUCKER PRAGER e DRUCKER PRAGER HARDENING e ELASTIC e EOS Abaqus Example Problems Manual e High velocity impact of a ceramic target Section 2 1 18 7 12 Johnson Cook plasticity in Abaqus Standard Products Abaqus Standard Abaqus CAE Benefits The Johnson Cook model which is an analytical form of hardening for isotropic Mises plasticity is now available in Abaqus Standard Description This model is suitable for modeling high strain rate behavior of many metals and was previously available only in Abaqus Explicit Abaqus CAE Usage Property module Material editor Mechanical Plasticity Plastic Hardening Johnson Cook MATERIALS References Abaqus Analysis User s Manual e Johnson Cook plasticity Section 20 2 7 e Damage and failure for ductile metals overview Section 21 2 1 Abaqus CAE User s Manual e Using the Johnson Cook hardening model to define classical metal plasticity in Defining plasticity Section 12 9 2 in the online HTML version of this manual Abaqus Keywords Reference Manual e PLASTIC e RATE DEPENDENT Abaqus Verification Manual e Johnson Cook plasticity Section 2 2 15 e Progressive damage and failure of ductile metals Section 2 2 20 7 13 Enhancements to Johnson Cook strain rate dependence P
91. ate maximum number of elements when you create the remeshing rule as shown in Figure 12 2 Figure 12 3 shows the effect of specifying the maximum number of elements in the remeshing rule The figure shows from left to right e The original mesh approximately 14 000 elements generated e The mesh after a remeshing rule was applied with no limit on the maximum number of elements approximately 450 000 elements generated e The mesh after a remeshing rule was applied with a limit of 50 000 elements Abaqus CAE Usage Mesh module Adaptivity Remeshing Rule Create select region Constraints Approximate maximum number of elements 12 4 MESHING O Create Remeshing Rule x Name Pressure vessel Remeshing Rule 1 Description Region Picked Step and Indicator Sizing Method Constraints M Element Size Minimum S Auto compute 0 05 Specify Maximum Auto compute 50 C Specify IV Approximate maximum number of elements 100000 M Rate Limits Refinement Use default Specify Do not refine Low High 5 poaa Coarsening Use default Specify Do not coarsen Low High 5 OK Cancel Figure 12 2 Specifying an approximate maximum number of elements in the Create Remeshing Rule dialog box References Abaqus Analysis User s Manual e Solution based mesh sizing Section 12 3 3 Abaqus CAE User s Manual e Choosing remeshing
92. ber of copies of the software on your premises as follows e Individual Use You may install and use the software with third party programs designed and developed for use with the software Production Use You may install and use any number of copies of the software on your premises to design develop test and demonstrate your programs 2 RIGHT TO DISTRIBUTE If you comply with the terms below you may copy and distribute the object code form of the software listed in the REDIST TXT file in conjunction with the programs you develop Further you may permit distributors of your programs to copy and distribute the software as part of those programs you create a Distribution Requirements If you distribute the software you must add significant primary functionality to it in your programs require distributors and external end users to agree to terms that protect it at least as much as this agreement display your valid copyright notice on your programs and indemnify defend and hold harmless Microsoft from any claims including attorneys fees related to the distribution or use of your programs b Distribution Restrictions You may not alter any copyright trademark or patent notice in the software use Microsoft s trademarks in your programs names or in a way that suggests your programs come from or are endorsed by Microsoft distribute the software to run on a platform other than the Windows platform include the software in ma
93. but all nodes on the face will remain in plane e Create Parallel Planar Constraint in addition to the analytical rigid surface constraint described above a constraint is generated that forces the planar face to remain parallel to its original configuration e Create Beam Element Normal to Plane a beam element of any length is generated normal to the planar face and attached to the analytical rigid surface reference node through a kinematic coupling This technique requires that you first create either of the constraints described above Abaqus CAE Usage Interaction module Plug ins Tools Plane Remains Plane Create Planar Constraint or Create Parallel Planar Constraint or Create Beam Element Normal to Plane Reference Abaqus CAE User s Manual e Creating a planar constraint Section 79 16 in the online HTML version of this manual 11 INTERACTIONS Interactions This chapter discusses features related to contact and interaction modeling It provides an overview of the following enhancements Eulerian surfaces in Abaqus CAE Section 11 1 Pressure penetration in Abaqus CAE Section 11 2 General contact performance Section 11 3 General contact diagnostics Section 11 4 Visualizing initial strain free adjustments Section 11 5 User specified interference fit distance and user specified initial clearance distance for general contact Section 11 6 Contact stabilization c
94. clic Create Step General Direct cyclic Fatigue Include low cycle fatigue analysis All modules Model Edit Attributes model name Restart toggle on Read data from job References Abaqus Analysis User s Manual e Direct cyclic analysis Section 6 2 6 e Low cycle fatigue analysis using the direct cyclic approach Section 6 2 7 e Controlling the solution accuracy in direct cyclic analysis in Commonly used control parameters Section 7 2 2 Abaqus CAE User s Manual e Specifying model attributes Section 9 8 4 in the online HTML version of this manual e Configuring a direct cyclic procedure in Configuring general analysis procedures Section 14 11 1 in the online HTML version of this manual Abaqus Keywords Reference Manual e CONTROLS e DIRECT CYCLIC 6 16 AMS eigensolver performance improvements Products Abaqus Standard Abaqus AMS Benefits Enhancements to the AMS eigensolver improve the performance of frequency extraction analyses Description Several enhancements to the AMS eigensolver have been made in Abaqus 6 9 EF and Abaqus 6 10 A new procedure for handling a large number of constraints in the AMS eigensolver delivers improved performance for large models with many distributing coupling constraints or other Lagrange multiplier based features i e contact connector elements hyperelastic materials Table 6 2 demonstrates improved AMS performance in Abaqus 6 9 EF
95. co simulation interaction between regions of Abaqus Standard and Abaqus Explicit models that have dissimilar meshes In addition you can reduce the solution cost for models with a large number of co simulation interface nodes by permitting Abaqus Standard to factorize the interface matrix once per Abaqus Standard increment Description In Abaqus 6 9 you were required to provide Abaqus Standard and Abaqus Explicit meshes that matched on their shared co simulation region interfaces This restriction no longer applies By default for the subcycling time incrementation scheme an interface solve is performed in Abaqus Standard for every Abaqus Explicit increment This solve can be significantly costly for two reasons First the interface matrix used for the interface solve is dense and its size scales with the number of interface nodes Second the interface matrix changes every Abaqus Explicit increment requiring factorization in Abaqus Standard for every Abaqus Explicit increment You can reduce the impact of this cost by approximating the interface matrix and factorizing it once for the duration of an Abaqus Standard increment rather than for each Abaqus Explicit increment For models with greater than 100 interface nodes and a subcycling ratio greater than 50 this new feature typically reduces the analysis time by a factor between 1 2 and 3 0 ANALYSIS PROCEDURES References Abaqus Analysis User s Manual e Preparing an Abaqus Standard or
96. co simulation you create two models each model representing a complementary portion of the total simulation model You submit two analysis jobs for execution and Abaqus exchanges interface data as needed between the two analyses In Abaqus CAE you create a co simulation interaction in each model to specify the interface region and coupling schemes Then you create a co execution to identify the two models involved in the co simulation and specify the job parameters for each analysis Most of the coupling parameters are determined automatically based on the step types and the step parameters being coupled You can display the results of a co simulation in the Visualization module Figure 6 1 shows the results of a conjugate heat transfer analysis using Abaqus CFD and Abaqus Standard Figure 6 1 Velocity vector plot representing air flow around a circuit board model ANALYSIS PROCEDURES Abaqus CAE Usage Interaction module Interaction Create Fluid Structure Co simulation boundary Job module Co execution Create Co execution Submit References Abaqus Analysis User s Manual e Abaqus CFD to Abaqus Standard or to Abaqus Explicit co simulation Section 14 1 5 Abaqus CAE User s Manual e Chapter 25 Co simulations Abaqus Example Problems Manual e Conjugate heat transfer analysis of a component mounted electronic circuit board Section 6 1 1 6 4 Iterative equation solver Products Abaqus Standard
97. commands to the most recent release A complete list of Abaqus Scripting Interface commands that have changed is included in Summary of Abaqus Scripting Interface changes between Abaqus 6 9 and Abaqus 6 10 in the Abaqus Scripting Reference Manual This chapter provides an overview of the following enhancements e Python upgrade Section 15 1 e Accessing internal sets Section 15 2 15 1 Python upgrade Product Abaqus CAE Benefits Abaqus now includes Python Version 2 6 Description The version of Python included with Abaqus 6 10 has been upgraded to 2 6 There are no changes to the user interface for this upgrade The revised upgradeScript utility allows you to upgrade scripts to Abaqus 6 10 Use the upgradeScript utility provided with the Abaqus release to make any changes to your saved scripts required for compatibility with the new Python version and any changes in the Abaqus Scripting Interface commands Reference Abaqus Scripting Reference Manual e Upgrade script commands Section 49 10 15 2 Accessing internal sets Product Abaqus CAE Benefits You can now access sets generated by Abaqus CAE for use in your scripts Description A new optional argument readInternalSets has been added to the openOdb method in the Abaqus Scripting Interface By default readInternalSets is False and scripts can access only those sets that you have created and saved Set readInternalSets to True to access internal sets cr
98. compatibility problems You should always check attribute assignments before running an analysis if you have made any changes to the model 4 6 MODELING Reference Abaqus CAE User s Manual e Chapter 19 The Sketch module 4 6 Three dimensional sweep paths for swept features Product Abaqus CAE Benefits You can now create a swept solid feature swept shell feature or swept cut feature that follows a three dimensional sweep path You can also select any face of your part as the sweep profile for solid or cut sweeps and you can select a set of edges or wires on your part as the sweep profile for a shell sweep These enhancements and other new options increase the functionality and usability of swept features Description Abaqus CAE now enables you to define a three dimensional sweep path when you add a swept feature to a part Figure 4 5 shows an example of a solid sweep that follows a three dimensional spline as its path Figure 4 5 Solid sweep following a spline wire 4 7 MODELING When you define the sweep profile you can now select one of the faces on your part as the sweep profile for swept solid features or swept cut features and you can now select one or more edges as the sweep profile for swept shell features Several options have also been added to the definition of swept features that allow you to e Apply a twist or draft to a swept feature e Control whether the normal to the sweep profile remains c
99. ct Abaqus CAE Benefits If there are no conflicts Abaqus CAE attempts to preserve the node and element labels from the model when writing an input file without parts and assemblies As a result your pre and postprocessing scripts can use labels to reliably refer to particular nodes and elements Description Previous releases of Abaqus CAE renumbered the nodes and elements when writing an input file without parts and assemblies Abaqus CAE now attempts to preserve the node and element labels provided no conflicts arise between any part or part instance labels If any conflicts arise between any part or part instance node labels Abaqus CAE displays a warning before it renumbers all of the nodes and elements in the input file Abaqus CAE Usage All modules Model Model Attributes model name Do not use parts and assemblies in input files Reference Abaqus CAE User s Manual e Writing input files without parts and assemblies Section 9 9 4 12 11 MESHING 12 10 Editing the mesh of a dependent part instance Product Abaqus CAE Benefits You can now make minor adjustments to ameshed dependent part instance by moving or projecting selected nodes Description In general you cannot use the Edit Mesh toolset to modify the mesh of a dependent part instance however you can now move the nodes of a dependent part instance using the Edit tool in the Edit Mesh toolset Similarly you can project the nodes of a dependent par
100. d S mod S mod S mod S mod E If the VISCOUS parameter is omitted or the option is not used as a suboption of SUBSTRUCTURE PROPERTY the substructure property uses COMBINED as the default with the mass and stiffness proportional Rayleigh damping factors specified under the DAMPING ALPHA or BETA option DEBOND The VISCOSITY parameter on this option has been removed Use the new VISCOSITY parameter on the FRACTURE CRITERION option to specify the viscosity coefficient used in the viscous regularization in Abaqus Standard DECHARGE In steady state dynamic analysis the LOAD CASE parameter has been replaced by the REAL and IMAGINARY parameters to define real and imaginary loading DENSITY The new PORE FLUID parameter has been added to allow specification of the density of the pore fluid in a geostatic or soils consolidation analysis that models heat transfer in a fully coupled manner with the pore fluid flow and the mechanical deformations DLOAD In steady state dynamic analysis the LOAD CASE parameter has been replaced by the REAL and IMAGINARY parameters to define real and imaginary loading DSECHARGE In steady state dynamic analysis the LOAD CASE parameter has been replaced by the REAL and IMAGINARY parameters to define real and imaginary loading DSLOAD In steady state dynamic analysis the LOAD CASE parameter has been replaced by the REAL and IMAGINARY parameters to define real and imaginary loading D
101. d output of MISES PSD of Mises stress and RMISES RMS of Mises stress can be requested Abaqus Standard writes the needed generalized response data to the output database odb file Abaqus Viewer accesses these data and computes the PSD and RMS stresses using the method outlined in Sandia National Lab report SAND98 0260 An Efficient Method for Calculating RMS von Mises Stress in a Random Vibration Environment by Segalman D J et al Both contour and X Y plots can be obtained Abaqus CAE Usage Step module Field output request editor for frequency step Output Variables S History output request editor for random response step Output Variables MISES or RMISES Visualization module Result Field Output select MISES or RMISES Tools XY Data Create ODB field output References Abaqus Analysis User s Manual e Abaqus Standard output variable identifiers Section 4 2 1 e Random response analysis Section 6 3 11 Abaqus CAE User s Manual e Configuring a random response procedure in Configuring linear perturbation analysis procedures Section 14 11 2 in the online HTML version of this manual 13 3 Enhancements to output from direct steady state dynamic analysis Product Abaqus Standard Benefits Restrictions to element history output in direct steady state dynamic analysis have been removed 13 2 OUTPUT AND VISUALIZATION Description Element history output is now available for mul
102. d party analysis program that supports the MpCCl interface Co simulation with MADYMO This add on analysis capability for Abaqus Explicit can be used to perform vehicle occupant crash safety simulations by coupling Abaqus Explicit with MADYMO Interfaces Abaqus Interface for Moldflow This optional interface translates finite element model information from a Moldflow analysis to an Abaqus input file Abaqus Interface for MSC ADAMS This optional interface allows Abaqus finite element models to be included as flexible components within the MSC ADAMS family of products The interface is based on the component mode synthesis formulation of ADAMS Flex Specifically flexibility data from Abaqus superelements are translated to the modal neutral mn file format required by the ADAMS Flex product Although the ADAMS Flex interface supports only linear flexibility data the Abaqus user may include an arbitrary number of preloading steps before the linear flexibility data are obtained Multiple flexible components generated by Abaqus can be included in an MSC ADAMS model Most Abaqus structural elements are supported by the interface a INTRODUCTION TO Abaqus 6 10 Associative interfaces and geometry translators CATIA V5 Associative Interface This add on capability for Abaqus CAE creates a connection between a CATIA V5 session and an Abaqus CAE session This connection can be used to transfer model information from CATIA V5 to Abaqus CAE Subsequ
103. database and unlock one of its native parts Abaqus CAE associates the mesh data for that part with the part s regenerated geometry This behavior is consistent with the behavior of independent part instances which retained their mesh data upon upgrade and unlocking in previous releases Reference Abaqus CAE User s Manual e What is part and assembly locking Section 11 12 12 14 OUTPUT AND VISUALIZATION 13 Output and visualization This chapter discusses obtaining postprocessing and visualizing results from Abaqus analyses It provides an overview of the following enhancements e Element nodal forces in beam section orientations Section 13 1 e PSD and RMS Mises stress contour and history plots from random response analysis Section 13 2 e Enhancements to output from direct steady state dynamic analysis Section 13 3 e Tsosurface contour type for contour plots Section 13 4 e Allowing for multiple view cuts Section 13 5 e Interpolated values on cut surfaces for symbol plots Section 13 6 e Improved control over arrow color and display in symbol plots Section 13 7 e Combining data from multiple output databases Section 13 8 e Finding the nearest node to a point Section 13 9 e Finding the average temperature of a set of elements Section 13 10 e New output variables for connectors Section 13 11 e Field output for connectors Section 13 12 e
104. de the region of the global model elements SURFACE INTERACTION Use the new TRACKING THICKNESS parameter to specify a thickness that determines the contacting surfaces to be tracked TENSION CUTOFF Specify tension cutoff data for the Mohr Coulomb plasticity model TRIAXIAL TEST DATA This option can now be used in Abaqus Explicit to provide triaxial test data TRS This option can be used in Abaqus Explicit only in conjunction with the VISCOSITY option VISCOSITY Define the shear viscosity of the material This option replaces the EOS SHEAR TYPE VISCOUS option 16 3 Changes in Abaqus user subroutines This section summarizes the changes and the additions that have been made to user subroutines that can be used in an Abaqus model mod S new E UINTER Three new arguments DVISCOUS DSTRUCTURAL and FREQR have been added that allow user defined material damping matrices to be implemented in direct steady state dynamic analysis VUFLUIDEXCH User subroutine to define the mass flow rate heat energy flow rate for fluid exchange 16 11 SUMMARY OF CHANGES new E VUFLUIDEXCHEFFAREA User subroutine to define the effective area for fluid exchange 16 4 Changes in Abaqus output variable identifiers This section summarizes the changes and the additions that have been made to output variable identifiers used in Abaqus Element integration point variables new E new E mod E mod E mod
105. de variety of users Consolidating onto a single powerful integrated simulation environment allows smooth and consistent handling of multiple workflows easy sharing of models and results and evolution of legacy methods to a more sophisticated real world approach In addition Abaqus products are designed to effectively and efficiently complement existing processes and tools for design production and data management Some of the benefits of our Unified FEA strategy include reduction in a company s FEA toolset and training expenses greater efficiency in model generation improved correlation between tests and analysis results improved data transfer between simulations and a more flexible workforce For more information visit the Unified FEA page at www simulia com unified Individual components of the Abaqus suite are described in this section Analysis e Abaqus Standard This general purpose finite element analysis program includes all analysis capabilities except nonlinear dynamic analysis using explicit time integration provided in the Abaqus Explicit program and the add on analysis functionality described below e Abaqus Explicit This product provides nonlinear transient dynamic analysis of solids and structures using explicit time integration Its powerful contact capabilities reliability and computational efficiency on large models also make it highly effective for quasi static applications involving discontinuous nonlinear
106. dentify the predefined field variable that will be used to drive field expansion strains FIELD Use the new OUTPUT VARIABLE parameter in conjunction with the FILE parameter to define predefined fields using nodal temperatures NT normalized concentrations NNC and electric potentials EPOT read from previously generated output databases FILTER Use the new INVARIANT parameter in conjunction with the OPERATOR parameter to indicate that you want the maximum minimum or absolute maximum of the output variable s invariant to be filtered and monitored over time Use the filter in combination with element or nodal field output OUTPUT FIELD 16 7 5 SUMMARY OF CHANGES mod E mod E mod S E new E mod S mod S FLUID EXCHANGE A new value is available for the EFFECTIVE AREA parameter Set EFFECTIVE AREA USER to indicate that user subroutine VUFLUIDEXCHEFFAREA will be used to define the effective area of the surface taking the local material state into account Set the new CONSTANTS parameter equal to the number of fluid exchange constants needed as data to define the effective area for fluid exchange in user subroutine VUFLUIDEXCHEFFAREA FLUID EXCHANGE PROPERTY A new value is available for the TYPE parameter Set TYPE USER to indicate that user subroutine VUFLUIDEXCH is used to define fluid exchange by specifying the mass flow rate and or heat energy flow rate Set the new CONSTANTS parameter eq
107. dface node no longer added for serendipity elements involved in surface to surface contact pairs Controlling smoothness of the redistribution of contact forces upon sliding for surface to surface contact Progressive viewfactor calculation Element nodal forces in beam section orientations PSD and RMS Mises stress contour and history plots from random response analysis Enhancements to output from direct steady state dynamic analysis Combining data from multiple output databases Field output for connectors Define viscous and structural matrices via user subroutine UINTER Utility routines to obtain parallel processes information Abaqus Explicit Section 3 4 Double precision constraint solving within a single precision Abaqus Explicit execution Section 3 5 Enhanced support for translation of Nastran bulk data files Section 3 6 Dynamic load balancing for domain level parallel execution Section 4 15 Section 4 16 Section 5 2 Section 6 3 Section 6 8 Section 6 18 Section 7 1 Section 7 2 Section 7 3 Enhancements to distributions of orientations Expanded use of distributions for shell sections Model import from ANSYS input files Abaqus CFD to Abaqus Standard or to Abaqus Explicit co simulation Enhancements in Abaqus Standard to Abaqus Explicit co simulation Submodeling based on the driven nodes only found lying within the global model Mohr Coulomb plasticity in Abaqus Explicit Critical state clay plasticity model in Abaq
108. diation Section 37 1 1 Abaqus CAE User s Manual e Defining a cavity radiation interaction Section 15 13 18 in the online HTML version of this manual Abaqus Keywords Reference Manual e RADIATION VIEWFACTOR Abaqus Theory Manual e Viewfactor calculation Section 2 11 5 11 16 Display of connector section assignment tags Product Abaqus CAE Benefits Connector section assignment tags are now visible in Abaqus CAE 11 16 INTERACTIONS Description When you create connector section assignments Abaqus CAE generates identification strings to associate the assignments with connector orientations These strings referred to as tags cannot be modified and they have been generated internally since Abaqus CAE 6 9 EF but were previously visible only through the use of an environment variable The tags are now displayed in the connector section assignment manager and the Model Tree tooltips You can also use the Assembly Display Options to show the connector section assignment tags in the viewport see Figure 11 9 By default the tags are not displayed in the viewport E Connector Section Assignment Manager x ection Name _ Connection Type een BeamSect 1 Beam Wire 1 Set 1 CSA 1 Wire 2 Set 1 CSA 2 v BeamSect 1 Create Edit Dismiss Delete Y Beam CSA 3 Figure 11 9 Connector section assignment tags in the viewport and the connector section assignment
109. directory Current directory Cancel Figure 14 1 The Save Plug in dialog box Abaqus CAE Usage All modules Plug ins Abaqus RSG Dialog Builder Reference Abaqus CAE User s Manual e Chapter 78 The Plug in toolset 14 6 Utility routine to obtain the volume fraction in Eulerian elements Benefits You can now obtain the volume fraction in Eulerian elements in Abaqus Explicit using the utility routine VGETVRM Description The volume fraction in Eulerian elements can now be obtained using the utility routine VGETVRM through the output variable key EVF The utility routine VGETVRM can be called from the utility 14 4 USER SUBROUTINES UTILITIES AND PLUG INS routine VUSDFLD where the volume fraction can be saved as either a state or a field variable this variable can then be used in user subroutines such as VUMAT References Abaqus User Subroutines Reference Manual e VUSDFLD Section 1 2 18 e Obtaining material point information in an Abaqus Explicit analysis Section 2 1 7 14 5 Abaqus SCRIPTING INTERFACE 15 Abaqus Scripting Interface This chapter discusses using the Abaqus Scripting Interface to write user scripts Abaqus makes every attempt to be backward compatible and can execute most Abaqus Scripting Interface scripts from previous releases of Abaqus However backward compatibility is not guaranteed beyond several releases of Abaqus and it is recommended that you upgrade your
110. dom and the corresponding stress displacement elements The elastic porous elastic Cam clay plasticity and Mohr Culomb plasticity material models are supported Although the list of supported materials includes materials that exhibit inelastic behavior the procedure is intended to be used in analyses in which the material response is primarily elastic that is inelastic deformations are small The new enhancements are available from the Incrementation tabbed page when you create or edit a geostatic step in Abaqus CAE You must select automatic incrementation to access the new controls The default settings for increment size and maximum displacement change are shown in Figure 6 6 6 21 a ANALYSIS PROCEDURES Name Step 1 Type Geostatic Basic Incrementation Other Type Automatic Fixed Initial Minimum Maximum Increment size fi 1E 005 fi Max displacement change 1E 005 Figure 6 6 The Incrementation options for a geostatic step Abaqus CAE Usage Step module Create Step General Geostatic Incrementation References Abaqus Analysis User s Manual e Geostatic stress state Section 6 8 2 Abaqus CAE User s Manual e Configuring a geostatic stress field procedure in Configuring general analysis procedures Section 14 11 1 in the online HTML version of this manual Abaqus Keywords Reference Manual e GEOSTATIC Abaqus Verification Manual e xGEOSTATIC UTOL Section 5 1 9 6 2
111. e distance for general contact in Abaqus Standard that differs from what is implied by the mesh geometry Strain free adjustments of initial nodal positions are used by Abaqus Standard to achieve the interference overclosure or clearance gap distance that you specify The interference fit is then resolved during the first analysis step with the preexisting shrink fit method Figure 11 3 depicts a series of configurations for an example with a specified interference distance h The specified interference distance differs from that implied by the original mesh geometry in fact a gap exists over part of the interface for the original mesh geometry The second configuration in Figure 11 3 shows the effect of strain free adjustments to create uniform overclosure corresponding to the specified interference distance Subsequent configurations in Figure 11 3 represent resolution of the overclosure during the first analysis step with the shrink fit method This capability is applicable to cases in which the specified interference clearance distance differs from that implied by the mesh geometry by less than approximately one third of the element dimensions mesh distortion in the configuration resulting from strain free nodal adjustments can occur if this difference is large see Visualizing initial strain free adjustments Section 11 5 for information on visualizing initial strain free adjustments References Abaqus Analysis User s Manu
112. e filters if you want to set up different filtering conditions for the first step than in the second step e You designate one output database as the master output database for every combine operation The combine operation first transfers all results data subject to filtering selections from the master output database to the combined output database The combine operation then locates results data from matching steps and frames in the subsequent output databases and copies only those data into the combined output database This strategy provides a more coherent structure for the combined results data The Combine ODBs plug in is shown in Figure 13 4 E Combine ODBs x Job name Combine job 1 Filters Step Frame Yariable Filter step 2 2 u c models Master 1 0odb Step 1 ALL 5 U Filter ster 45 E c models odb 1 0db c models odb 2 0db Dismiss Figure 13 4 The Combine ODBs plug in 13 7 OUTPUT AND VISUALIZATION When you use the abaqus odbcombine execution procedure you specify the filter selections and the output databases in an XML configuration file Use of the configuration file is supported in the Combine ODBs plug in as well When you select the configuration file you want to use Abaqus CAE populates the fields in the plug in with the options specified in the file Abaqus CAE Usage Visualization module Plug ins Tools Combine ODBs References Abaqus Analysis
113. e heat transfer analysis from Step 1 and driving a stress displacement analysis using nodal temperatures from Step 1 and normalized concentrations stored as a field variable from Step 2 U PRESCRIBED CONDITIONS These new features also support the mapping of these output variables onto a predefined field between dissimilar meshes References Abaqus Analysis User s Manual e Sequentially coupled multiphysics analyses using predefined fields Section 14 2 1 e Tnitial conditions in Abaqus Standard and Abaqus Explicit Section 30 2 1 e Predefined fields Section 30 6 1 Abaqus Keywords Reference Manual e FIELD e INITIAL CONDITIONS Abaqus Verification Manual e TEMPERATURE FIELD and PRESSURE STRESS Section 5 1 25 9 4 CONWEP blast loading in Abaqus Explicit Products Abaqus Explicit Abaqus CAE Benefits Structures subject to air blast loading can be analyzed efficiently using the CONWEP model The required input is simple and there is no need to model the fluid medium The model is known to yield good results in air blast loading analyses when the coupling between the air and structure is weak Description CONWEP loading allows you to impose pressure loading due to an explosion in air The loading is defined by the location of the explosion the time of detonation and the loading surfaces The following blast wave types are supported e Air blast spherical e Surface blast hemispherical
114. eated by Abaqus A new member is nternal is also available for sets so that you can test whether a set is an internal set or a regular set 5 Abaqus SCRIPTING INTERFACE References Abaqus Scripting Reference Manual e openOdb Section 31 32 4 e openOdb Section 57 33 4 15 2 SUMMARY OF CHANGES 16 Summary of changes This section summarizes the changes and the additions that have been made to the items that define an Abaqus model including elements keywords user subroutines and output variables For more information on these modifications refer to the preceding chapters The following identifiers are used new The item is new in Abaqus 6 10 mod The item existed in Abaqus 6 9 but has been modified or enhanced in Abaqus 6 10 rem The item existed in Abaqus 6 9 but has been removed in Abaqus 6 10 S The item is new modified or removed in Abaqus Standard E The item is new modified or removed in Abaqus Explicit S E The item is new modified or removed in both Abaqus Standard and Abaqus Explicit C The item is new modified or removed in Abaqus CFD 16 1 Changes in Abaqus elements This section summarizes the changes and the additions that have been made to the elements that can be used in an Abaqus model new S CAX4PT Coupled temperature pore pressure element 4 node axisymmetric quadrilateral bilinear displacement bilinear pore pressure bilinear temperature new S CAX4RPT Coupled
115. ect them You can use the new feature edge selection technique to renumber the nodes or elements along a selected edge of the orphan mesh part Abaqus CAE Usage Mesh module Mesh Edit References Abaqus CAE User s Manual e Using the angle and feature edge method to select multiple objects Section 6 2 3 e Chapter 46 Viewing results along a path e What can I do with the Edit Mesh toolset Section 62 1 12 8 Numbering merged nodes Product Abaqus CAE Benefits You can now retain either the highest or lowest label of selected nodes that you are merging This allows you to maintain a known range of node labeling across merged parts Description When you use the Edit Mesh toolset to merge selected nodes you can now select whether the label of the single new node retains the lowest or highest number of the merged nodes Figure 12 7 shows the prompt area during the node merge procedure and the menu that allows you to choose the label of the single new node 12 10 MESHING Select the nodes to merge individually keep lower numbered nodes Figure 12 7 The prompt area during the node merge procedure Abaqus CAE Usage Mesh module Mesh Edit References Abaqus CAE User s Manual e What can I do with the Edit Mesh toolset Section 62 1 e Merging nodes Section 62 5 5 in the online HTML version of this manual 12 9 Preserving node and element labels in the input file Produ
116. efits Thread parallel execution of element operations provides improved performance for many quasi static analyses Description Quasi static analyses now execute element operations using thread based parallelization among processors of a compute node In previous Abaqus releases these operations were performed on only one processor per compute node for the quasi static procedure References Abaqus Analysis User s Manual e Parallel execution in Abaqus Standard Section 3 5 2 Abaqus Keywords Reference Manual e VISCO 3 4 Double precision constraint solving within a single precision Abaqus Explicit execution Products Abaqus Explicit Abaqus CAE EXECUTION Benefits The double precision constraint solver provides improved accuracy for models with complicated constraints Description For models with complicated constraints improved solution accuracy can be achieved by executing the constraint solver in double precision From a performance viewpoint it may however be undesirable to execute everything in double precision The double precision constraint solver offers the flexibility to execute only the constraint packager and solver in double precision while the Abaqus Explicit packager and analysis are executed in single precision Abaqus CAE Usage Job module Job Create Precision tabbed page Abaqus Explicit precision References Abaqus Analysis User s Manual e Abaqus Standard Abaqus Explicit and Abaqus
117. efits You can now define an effective area of a surface on the fluid cavity for fluid exchange leakage that depends on the material state in the underlying elements on the surface as well as define a mass flow rate and or heat energy flow rate using user subroutines Description User subroutine VUFLUIDEXCHEFFAREA can be used to define an effective leakage area if leakage needs to be modeled as a function of the material state in the underlying elements of the specified surface For example this subroutine can be used to define the leakage area at an element level for modeling fabric permeability in uncoated airbags where the leakage can vary locally depending on the strains in the yarn directions and the angle between the fabric yarns User subroutine VUFLUIDEXCH can be used to define mass flow rate and or heat energy flow rate for fluid exchange when built in fluid exchange property types cannot satisfactorily model the mass heat energy flow References Abaqus Analysis User s Manual e Fluid cavity definition Section 11 6 2 e Fluid exchange definition Section 11 6 3 Abaqus Keywords Reference Manual e FLUID CAVITY e FLUID EXCHANGE e FLUID EXCHANGE PROPERTY Abaqus User Subroutines Reference Manual e VUFLUIDEXCH Section 1 2 12 e VUFLUIDEXCHEFFAREA Section 1 2 13 Abaqus Verification Manual e Surface based fluid cavities Section 5 1 23 14 3 Utility routines to obtain principal stress strain values
118. egrees of freedom The number of factorization floating point operations required for the direct sparse solver grows nonlinearly with the increase in the number of degrees of freedom This leads to an obvious nonlinear increase in solution time for the direct sparse solver Further increases in ANALYSIS PROCEDURES model size would make the use of the direct sparse solver impractical In addition the solution cost of the iterative solver increases almost linearly with increasing problem size This behavior makes further growth in model size manageable Overall the iterative solver performs dramatically better than the direct sparse solver Table 6 1 Performance comparison of the iterative and direct sparse solvers for a powertrain benchmark run on 32 cores Degrees of Direct Sparse Direct Iterative Relative Freedom Solver Solver Wall Solver Wall Speedup Millions Factorization Clock Time Clock Time FLOPS hrs hrs Problem 1 7 5 5 x 10 0 10 0 02 5 0 Problem 2 32 1 4 x 10 3 16 0 11 28 7 Ratio 4 6 24 6 31 6 5 5 N A Abaqus CAE Usage Step module Other Solver Controls References Abaqus Analysis User s Manual e Iterative linear equation solver Section 6 1 5 Abaqus CAE User s Manual e Configuring general analysis procedures Section 14 11 1 in the online HTML version of this manual e Customizing solver controls Section 14 15 2 in the online HTML version of this manu
119. elasticity with anisotropic elasticity in Abaqus Explicit Section 7 4 e The surface and tet meshing algorithms in Abaqus CAE have been enhanced to provide improved performance and robustness Mapped meshing performance Section 12 1 INTRODUCTION TO Abaqus 6 10 e Material orientations can now be created in Abaqus CAE based on the normal direction of the underlying geometry topology Enhancements to orientations for material orientations and composite layups Section 4 18 e A midsurface model of shell elements can be created to replace thin solids Midsurface modeling Section 4 2 e Planar view cuts are now available to display the interior of your model s geometry or mesh during the modeling process View cuts in Abaqus CAE Section 4 3 Abaqus 6 10 is released on DVD ROM Products supported on each of the following combinations of supported operating systems and processors are summarized in Table 1 1 Interactive products include Abaqus CAE and Abaqus Viewer Analysis products include Abaqus Standard Abaqus Explicit and Abaqus CFD Table 1 1 Overview of platform and product support Platform Availability Supported products Windows x86 32 DVD Interactive and analysis products Windows x86 64 DVD Interactive and analysis products Linux x86 64 DVD Interactive and analysis products Linux Itantum ftp Abaqus Standard and Abaqus Explicit HP UX Itanium ftp Abaqus Standard and Abaqus Explic
120. ence Tension cutoff Ignition and growth equation of state Specifying a constant pressure specific heat in Abaqus CFD Support for cylindrical elements in Abaqus CAE Fluid elements in Abaqus CFD Eulerian mesh motion in Abaqus Explicit Eulerian boundary conditions in Abaqus CAE CONWEP blast loading in Abaqus Explicit Plotting amplitude data Creating a planar constraint Eulerian surfaces in Abaqus CAE Pressure penetration in Abaqus CAE Support for element and contact pair removal and reactivation in Abaqus CAE Progressive viewfactor calculation Display of connector section assignment tags Coincident Point Builder Support for position tolerance and adjustment of the slave surface initial position for cyclic symmetry interactions in Abaqus CAE Mapped meshing performance Mesh verification queries and saved sets Improvements to adaptive remeshing Tetrahedral meshing enhancements Mesh seeding enhancements Global node and element renumbering of meshed parts or part instances Local node and element renumbering of orphan mesh parts Numbering merged nodes PRODUCT INDEX Section 12 9 Section 12 10 Section 12 11 Section 12 12 Section 13 1 Section 13 2 Section 13 4 Section 13 5 Section 13 6 Section 13 7 Section 13 8 Section 13 9 Section 13 10 Section 13 11 Section 13 12 Section 13 13 Section 13 14 Section 13 15 Section 13 16 Section 14 5 Section 14 6 Section 15 1 Section 15 2 Preserving node and element l
121. ent modifications to the model in CATIA V5 can be propagated to the Abaqus CAE model while retaining any analysis features such as loads or boundary conditions that were defined on the model in Abaqus CAE The geometry of CATIA V5 format Part CATPart and Product CATProduct files can also be imported directly into Abaqus CAE SolidWorks Associative Interface This add on capability for Abaqus CAE creates a connection between a SolidWorks session and an Abaqus CAE session This connection can be used to transfer model information from SolidWorks to Abaqus CAE Subsequent modifications to the model in SolidWorks can be propagated to the Abaqus CAE model while retaining any analysis features such as loads or boundary conditions that were defined on the model in Abaqus CAE Pro ENGINEER Associative Interface This add on capability for Abaqus CAE creates a connection between a Pro ENGINEER session and an Abaqus CAE session This connection can be used to transfer model information between Pro ENGINEER and Abaqus CAE Modifications to the model in Pro ENGINEER can be propagated to the Abaqus CAE model without affecting any analysis features such as loads or boundary conditions that were defined on the model in Abaqus CAE and certain geometric modifications can be made in Abaqus CAE and propagated to the model in Pro ENGINEER NX Associative Interface This add on capability for Abaqus CAE creates a connection between an NX session and an Abaqu
122. er geometry edits Section 4 11 Stitching gaps in non manifold parts Section 4 12 Enhanced support in Abaqus CAE for modeling fracture mechanics using XFEM Section 4 13 Ability to select attachment points for additional modeling tasks Section 4 14 Enhancements to distributions of orientations Section 4 15 Expanded use of distributions for shell sections Section 4 16 Control over individual vector display in continuum shell composite layups Section 4 17 Enhancements to orientations for material orientations and composite layups Section 4 18 Querying mass properties for beams and trusses Section 4 19 Querying for disjoint ply regions Section 4 20 Querying for regions missing section assignments Section 4 21 Enhancements to the Datum toolset Section 4 22 Rendering of shell thickness Section 4 23 Hiding annotations Section 4 24 Quick display buttons for all datum geometry viewport annotations free body cuts and attributes Section 4 25 Specifying the universal gas constant Section 4 26 MODELING 4 1 Model types in Abaqus CAE Product Abaqus CAE Benefits The addition of the model type attribute allows the Abaqus CAE interface to be tailored to the type of analysis that you are performing Description When you create a model database you must now select a model type to specify whether you are modeling an Abaqus Standard or Aba
123. er the Features container in the Model Tree Abaqus CAE performs automatic repair on the entire part which can be time consuming for complex parts In addition automatic repair does not always reduce the number of invalid entities in a part particularly for parts that already have very few invalid entities If you are importing a part with few invalid entities consider using the individual repair tools in the Geometry Edit toolset to perform local repairs after import Abaqus CAE Usage All modules File Import Part Click Yes to perform automatic repair Reference Abaqus CAE User s Manual e A strategy for repairing geometry Section 67 4 5 5 Import and export of model data from stereolithography files Product Abaqus CAE MODEL IMPORT AND EXPORT Benefits You can now import a model from a file in stereolithography STL format into Abaqus CAE and you can export a part or an assembly from an Abaqus CAE model database to STL format Description The STL Import plug in enables you to import model data from an external file in STL format st1 into anew Abaqus CAE model Stereolithography data can be used for quick prototyping and manufacturing of parts and this enhancement enables you to import model data from STL files to use as display bodies or for visualization of display position You can import data from STL files in either ASCII or binary format By default the plug in creates a new Abaqus CAE model and a new Aba
124. erials in Abaqus CAE Products Abaqus Explicit Abaqus CAE Benefits You can now define low density foam materials in Abaqus CAE This enhancement increases the coverage and ease of use of product functionality within Abaqus CAE Description Abaqus CAE now provides support for low density foam materials in the Property module as shown in Figure 7 2 You can create a material model to describe a low density highly compressible elastomeric foam with significant rate sensitive behavior such as polyurethane foam Abaqus calculates material parameters from test data that you enter in the Test Data Editor You must provide uniaxial test data for both tension and compression Your test data must specify the uniaxial stress strain curve for different strain rate values Abaqus CAE Usage Property module Material editor Mechanical Elasticity Low Density Foam References Abaqus Analysis User s Manual e Low density foams Section 19 9 1 Abaqus CAE User s Manual e Creating a low density foam material model in Defining elasticity Section 12 9 1 in the online HTML version of this manual 7 11 Combining equations of state with pressure dependent shear plasticity in Abaqus Explicit Products Abaqus Explicit Abaqus CAE Benefits The combination of equations of state with pressure dependent shear plasticity is useful for modeling the response of ceramics and other brittle materials under high velocity impact cond
125. ess of the redistribution of contact forces upon sliding for surface to surface contact Product Abaqus Standard Benefits Quadratic smoothness of contact force redistribution often improves convergence and provides better resolution of contact stresses within regions with high contact stress gradients Description Key advantages of the surface to surface contact formulation in Abaqus Standard over traditional node to surface formulations include enhanced convergence behavior and better contact stress predictions Further enhancements to these characteristics are now available for many models due to smoother redistributions of contact forces upon sliding This enhanced smoothing is activated for general contact and surface to surface contact pairs by default if the slave surface is based on second order elements A user control is provided such that you can directly specify linear or quadratic smoothness regardless of the underlying element types The surface to surface formulation is able to represent linear variations in contact stress with a higher degree of accuracy with the new default smoothness setting if the underlying elements are quadratic Consider the case shown in Figure 11 6 of a bending load applied to two blocks that are joined by tied contact j Figure 11 6 Mesh and loading for a bending example with linearly varying interface stress Applied pressure distribution corresponding to pure bending Tied contact interface
126. ew SLIDING TRANSITION parameter to control the smoothness of nodal contact force redistribution upon sliding for surface to surface contact pairs CONTACT STABILIZATION Define contact stabilization controls for general contact CONTOUR INTEGRAL The new XFEM parameter allows you to indicate that the crack is modeled as an enriched feature with the extended finite element method CONWEP CHARGE PROPERTY Define a CONWEP charge for incident waves CO SIMULATION Two new values are available for the PROGRAM parameter Set PROGRAM MULTIPHYSICS for exchange of data between Abaqus and the 16 4 SUMMARY OF CHANGES SIMULIA Co Simulation Engine which in turn can exchange data with third party analysis programs that support the SIMULIA Co Simulation Engine Set PROGRAM DCI for exchange of data between Abaqus and certain third party analysis programs Consult the User s Guide for the third party analysis program to determine when this option is applicable The PROGRAM ACUSOLVE setting is no longer available mod S E CO SIMULATION CONTROLS The conditions for which the STEP SIZE parameter is required or optional are revised Set STEP SIZE MAX for Abaqus to select the maximum coupling step size based on the suggested coupling step size of Abaqus and the external program Set STEP SIZE MIN for Abaqus to select the minimum coupling step size based on the suggested coupling step size of Abaqus and the external program The new COUPLING SCH
127. f contents for a complete list of new features e Abaqus CFD anew Abaqus product offering is a computational fluid dynamics program with extensive support for preprocessing simulation and postprocessing in Abaqus CAE Abaqus CFD provides 1 1 a INTRODUCTION TO Abaqus 6 10 scalable parallel CFD simulation capabilities to address a number of nonlinear coupled fluid thermal and fluid structural problems Abaqus CFD analysis Section 6 1 e A new iterative equation solver offers significant performance enhancements for simulations involving large well conditioned blocky structures Iterative equation solver Section 6 4 e Enhancements to the general direct integration dynamic procedure make Abaqus Standard an effective option for a broad range of dynamic simulations in particular unstable quasi static problems Dynamics enhancements Section 6 5 e Several enhancements have been made to the coupled Eulerian Lagrangian CEL analysis capabilities in Abaqus Explicit An Eulerian mesh can now scale and translate during an analysis to follow the deformation of a surface or material This option which can be defined in Abaqus CAE allows you to create small efficient meshes in applications that involve large translations or deformations Eulerian mesh motion in Abaqus Explicit Section 9 1 Eulerian boundary conditions can now be defined in Abaqus CAE Eulerian boundary conditions in Abaqus CAE
128. faute dans la limite autoris e par la loi en vigueur Elle s applique galement m me si Microsoft connaissait ou devrait conna tre ventualit d un tel dommage Si votre pays n autorise pas l exclusion ou la limitation de responsabilit pour les dommages indirects accessoires ou de quelque nature que ce soit il se peut que la limitation ou l exclusion ci dessus ne s appliquera pas a votre gard EFFET JURIDIQUE Le pr sent contrat d crit certains droits juridiques Vous pourriez avoir d autres droits pr vus par les lois de votre pays Le pr sent contrat ne modifie pas les droits que vous conf rent les lois de votre pays si celles ci ne le permettent pas SIMULIA Worldwide Headquarters SIMULIA European Headquarters United States Australia Austria Benelux Canada China Czech amp Slovak Republics Finland France Germany Greece India Israel Italy Japan Korea Latin America Malaysia New Zealand Poland Russia Belarus amp Ukraine Scandinavia Singapore South Africa Spain amp Portugal Taiwan Thailand Turkey United Kingdom Locations Rising Sun Mills 166 Valley Street Providence RI 02909 2499 Tel 1 401 276 4400 Fax 1 401 276 4408 simulia support 3ds com http www simulia com Gaetano Martinolaan 95 P O Box 1637 6201 BP Maastricht The Netherlands Tel 31 43 356 6906 Fax 31 43 356 6908 simulia europe info 3ds com Technical Support Centers Fremont CA Tel
129. floating platform structures Abaqus Design This add on analysis capability for Abaqus Standard allows the user to perform design sensitivity analysis DSA The derivatives of output variables are calculated with respect to specified design parameters Abaqus Foundation This analysis option offers more efficient access to the linear static and dynamic analysis functionality in Abaqus Standard CZone for Abaqus This add on capability for Abaqus Explicit provides access to a state of the art methodology for crush simulation based on CZone technology from Engenuity Ltd Targeted toward the design of composite components and assemblies CZone for Abaqus provides for inclusion of material crush behavior in simulations of composite structures subjected to impact DDAM for Abaqus The Dynamic Design Analysis Method DDAM is a U S Navy methodology for qualifying shipboard equipment and supporting structures for survival of shock loading due to underwater explosions DDAM for Abaqus is a custom Abaqus application that is designed to make the evaluation phase of DDAM easier to perform Optional analysis functionality Abaqus AMS This add on analysis capability for Abaqus Standard allows the user to select the automatic multi level substructuring AMS eigensolver when performing a natural frequency extraction Co simulation with MpCCI This add on analysis capability for Abaqus can be used to solve multiphysics problems by coupling Abaqus with any thir
130. for Time gt All steps Calculate Cancel Figure 13 6 The Volume Weighted Average Temperature plug in Abaqus CAE Usage Step module Field or history output request editor Domain Set Output Variables Connector References Abaqus Analysis User s Manual e Abaqus Explicit output variable identifiers Section 4 2 2 Abaqus CAE User s Manual e Requesting output from connectors Section 23 9 13 12 Field output for connectors Products Abaqus Standard Abaqus Explicit Abaqus CAE Benefits You can now request connector field output to the output database and the results are displayed in Abaqus CAE during postprocessing as contour plots 13 10 Description Previously only connector history output was available but now you can request connector field output for the most commonly used connector output quantities Orientations at nodes accounting for both nodal rotation and connector orientation are also written to the output database and they can be visualized in Abaqus CAE The connector output variables available in the Edit Field Output Request dialog box of Abaqus CAE are shown in Figure 13 7 OUTPUT AND VISUALIZATION Ml Edit Field Output Request 4 Name Step F Output 2 Step 1 Procedure Dynamic Explicit Domain Output ariables Select from list below Preselected defaults All Edit variables CDERU CDERF v WY Connector Set lal x
131. for two industrial vehicle models ANALYSIS PROCEDURES Table 6 2 AMS performance improvements due to enhancement of handling a large number of constraints in Abaqus 6 9 EF Degrees of Number of Abaqus 6 9 Abaqus 6 9 EF Model Freedom Constraint Wall Clock Time Wall Clock Time Millions Equations h mm h mm Model 1 3 0 169 464 3 01 1 58 Model 2 4 3 285 816 0 49 0 34 Enhancements in the reduction phase and the recovery phase of the Abaqus 6 10 AMS eigensolver deliver noticeably improved performance for large scale models with any of the following features e Selective recovery with a large number of selected degrees of freedom e Structural or viscous damping e Acoustic structural coupling Table 6 3 illustrates the improved performance of the AMS eigensolver for three industrial models Model 3 is a 2 8 million degree of freedom vehicle model with damping projection and acoustic structural coupling Model 4 is a 4 3 million degree of freedom powertrain model with a large selective node set and damping projection and Model 5 is a 9 2 million degree of freedom vehicle model with a large selective node set Table 6 3 AMS performance improvements due to enhancement of the reduction phase and the recovery phase in Abaqus 6 10 Abaqus 6 9 EF Abaqus 6 10 Degrees of Model Freedom Number Wall Clock Number Wall Clock Millions of Modes Time h mm of Modes Time h mm Extracted Extracted Model 3 2 8 4434 0
132. from stereolithography files NX associative import Abaqus CFD analysis Incompressible fluid dynamics Abaqus CFD to Abaqus Standard or to Abaqus Explicit co simulation Section 6 4 Section 6 5 Section 6 6 Section 6 7 Section 6 8 Section 6 15 Section 6 19 Section 7 1 Section 7 2 Section 7 3 Section 7 4 Section 7 10 Section 7 11 Section 7 12 Section 7 13 Section 7 14 Section 7 15 Section 7 16 Section 8 1 Section 8 4 Section 9 1 Section 9 2 Section 9 4 Section 9 6 Section 10 1 Section 11 1 Section 11 2 Section 11 8 Section 11 15 Section 11 16 Section 11 17 Section 11 18 Section 12 1 Section 12 2 Section 12 3 Section 12 4 Section 12 5 Section 12 6 Section 12 7 Section 12 8 PRODUCT INDEX Iterative equation solver Dynamics enhancements Contour integral evaluation improvements Continued development of the XFEM based crack propagation capability Enhancements in Abaqus Standard to Abaqus Explicit co simulation Direct cyclic analysis in Abaqus CAE Enhancements to the geostatic procedure Mohr Coulomb plasticity in Abaqus Explicit Critical state clay plasticity model in Abaqus Explicit Cast iron plasticity in Abaqus Explicit Viscoelasticity with anisotropic elasticity in Abaqus Explicit Low density foam materials in Abaqus CAE Combining equations of state with pressure dependent shear plasticity in Abaqus Explicit Johnson Cook plasticity in Abaqus Standard Enhancements to Johnson Cook strain rate depend
133. h a pure white background in place of the off white background used in previous releases The table of contents frame now has a beige background and new icons and amp replace the book icons used in previous releases to indicate topics that can be expanded or collapsed Many section titles have been revised to be more concise making it easier to scan down the table of contents and locate appropriate sections For example the execution procedures in Chapter 3 Job Execution no longer start with Execution procedure for The discussion of parallel execution in the Abaqus Analysis User s Manual has been moved from Chapter 11 Special Purpose Techniques to Parallel execution Section 3 5 in Chapter 3 Job Execution The links for help on searching the HTML documentation have been updated The Search Tips link on the documentation collection page and in the search pane at the top of each manual opens a page with basic search information The Help button available in the Advanced Search dialog box opens a page containing information on the advanced search functions Each page contains a link to the other page and to the Using Abaqus Online Documentation book which was the only resource available in previous releases In the Abaqus Keywords Reference Manual keywords that are at least partially supported in the Abaqus CAE user interface now include Abaqus CAE in their list of supported product
134. he global model Enhancements to the geostatic procedure Enhancements to complex eigenvalue extraction analysis Enhancement to the geostatic and soils consolidation capabilities to model coupled heat transfer Transferring results with concrete damaged plasticity Finite strain viscoelasticity Finite strain viscoelasticity with Mullins effect Field expansion Viscous dissipation in a coupled analysis Johnson Cook plasticity in Abaqus Standard Enhancements to Johnson Cook strain rate dependence PRODUCT INDEX Section 7 14 Section 8 2 Section 9 3 Section 9 5 Section 11 3 Section 11 4 Section 11 5 Section 11 6 Section 11 7 Section 11 10 Section 11 11 Section 11 12 Section 11 13 Section 11 15 Section 13 1 Section 13 2 Section 13 3 Section 13 8 Section 13 12 Section 14 1 Section 14 4 Tension cutoff Coupled temperature pore pressure elements in Abaqus Standard Reading nodal output for temperature normalized concentration and electric potential from an output database into predefined field variables Enhancements to initial conditions General contact performance General contact diagnostics Visualizing initial strain free adjustments User specified interference fit distance and user specified initial clearance distance for general contact Contact stabilization controls for general contact User defined range for which contact opening output is provided Smooth transition of the allowable elastic slip Mi
135. he yield surface according to the inelastic volumetric strain Only the piecewise linear form of the hardening rule law is available in Abaqus Explicit 7 2 MATERIALS Import between Abaqus Standard and Abaqus Explicit is now supported for the clay plasticity model with piecewise linear hardening Abaqus CAE Usage Property module Material editor Mechanical Plasticity Clay Plasticity Hardening Tabular Suboptions Clay Hardening References Abaqus Analysis User s Manual e Critical state clay plasticity model Section 20 3 4 Abaqus CAE User s Manual e Defining clay plasticity in Defining plasticity Section 12 9 2 Abaqus Keywords Reference Manual e CLAY HARDENING e CLAY PLASTICITY Abaqus Verification Manual e Rate independent plasticity Section 2 2 9 Abaqus Theory Manual e Critical state models Section 4 4 3 7 3 Cast iron plasticity in Abaqus Explicit Products Abaqus Explicit Abaqus CAE Benefits The cast iron plasticity model is used for modeling the elastoplastic behavior of gray cast iron Description Abaqus Explicit now provides the cast iron plasticity model that previously was available only in Abaqus Standard The constitutive model describes the mechanical behavior of gray cast iron a material with a microstructure consisting of a distribution of graphite flakes in a steel matrix In tension the graphite flakes act as stress concentrators resulting
136. hind crack when fracture criterion is met Connector element variables mod S E mod S E mod S E mod S E mod S E mod E mod E mod E mod E new E new E CTF Connector total forces and moments are now available for element field output CEF Connector elastic forces and moments are now available for element field output CUE Connector elastic displacements and rotations are now available for element field output CUP Connector plastic relative displacements and rotations are now available for element field output CU Connector relative displacements and rotations are now available for element field output CUPEQ Connector equivalent plastic relative displacements and rotations are now available for element field output CVF Connector viscous forces and moments are now available for element field output CUF Connector uniaxial forces and moments are now available for element field output CDMG Connector components of the overall damage variable are now available for element field output CDERF Connector derived force is available for both field and history output CDERU Connector derived displacement is available for both field and history output 16 16 PRODUCT INDEX l PRODUCT INDEX Abaqus Standard Section 3 1 Section 3 2 Section 3 3 Section 3 5 Section 4 15 Section 5 2 Section 6 3 Section 6 4 Section 6 5 Section 6 6 Section 6 7 Section 6 8 Sect
137. in yielding as a function of the maximum principal stress followed by brittle behavior In compression the graphite flakes do not have an appreciable effect on the macroscopic response resulting in a ductile behavior similar to that of many steels The above differences manifest themselves in the following macroscopic properties i different yield strengths in tension and compression with the yield stress in compression being a factor of three or more higher than the yield stress in tension ii inelastic volume change in tension but little or no inelastic volume change in compression and iii different hardening behavior in tension and compression The model in Abaqus uses 7 3 MATERIALS a Mises type yield condition along with an associated flow rule to describe the ductile behavior of cast iron under compressive loading conditions and a pressure dependent yield surface with nonassociated flow to model the brittle behavior in tension Import between Abaqus Standard and Abaqus Explicit is now supported for the cast iron plasticity model Abaqus CAE Usage Property module Material editor Mechanical Plasticity Cast Iron Plasticity References Abaqus Analysis User s Manual e Cast iron plasticity Section 20 2 10 Abaqus CAE User s Manual e Defining cast iron plasticity in Defining plasticity Section 12 9 2 Abaqus Keywords Reference Manual e CAST IRON COMPRESSION HARDENING e CAST IRON PLASTICITY e
138. ing simulation data processes and intellectual property By building on established technology respected quality and superior customer service SIMULIA makes realistic simulation an integral business practice that improves product performance reduces physical prototypes and drives innovation Headquartered in Providence RI USA with R amp D centers in Providence and in V lizy France SIMULIA provides sales services and support through a global network of regional offices and distributors For more information visit www simulia com About Dassault Syst mes As a world leader in 3D and Product Lifecycle Management PLM solutions Dassault Syst mes brings value to more than 100 000 customers in 80 countries A pioneer in the 3D software market since 1981 Dassault Syst mes develops and markets PLM application software and services that support industrial processes and provide a 3D vision of the entire lifecycle of products from conception to maintenance to recycling The Dassault Syst mes portfolio consists of CATIA for designing the virtual product SolidWorks for 3D mechanical design DELMIA for virtual production SIMULIA for virtual testing ENOVIA for global collaborative lifecycle management and 3DVIA for online 3D lifelike experiences Dassault Systemes shares are listed on Euronext Paris 13065 DSY PA and Dassault Syst mes ADRs may be traded on the US Over The Counter OTC market DASTY For more information visit www 3ds com
139. ing thickness is specified 11 10 INTERACTIONS Results with default 2 5e 00 Results with tracking fener og thickness set to 2 5 tracking thickness Figure 11 5 Visualization of gaps between contacting surfaces References Abaqus Analysis User s Manual e Defining general contact interactions in Abaqus Standard Section 32 2 1 e Defining contact pairs in Abaqus Standard Section 32 3 1 Abaqus Keywords Reference Manual e SURFACE INTERACTION 11 11 Smooth transition of the allowable elastic slip Product Abaqus Standard Benefits Robustness has been improved when you adjust the allowable elastic slip during an analysis Description The setting of the allowable elastic slip associated with friction generally does not require user attention however adjustments from the default setting are occasionally made to improve convergence behavior or accuracy Previously if the allowable elastic slip was adjusted during an analysis the change in the setting would take effect suddenly at the beginning of a step which sometimes causes convergence 11 11 INTERACTIONS difficulty Abaqus Standard now generally uses the same approach for transitioning to a new value of the allowable elastic slip as has been used for changing friction coefficients References Abaqus Analysis User s Manual gt e Changing friction properties during an Abaqus Standard analysis in Frictional behavior Sec
140. interface to easily import an NX Unigraphics model into Abaqus CAE Description The NX Associative Interface allows you to transfer the geometry of an NX model to Abaqus CAE and is available from Elysium Inc www elysiuminc com MODEL IMPORT AND EXPORT Abaqus CAE Usage Assembly module Tools CAD Interfaces NX File Import Assembly File Filter ProE NX IDEAS CATIA V5 Elysium Neutral enf Reference Abaqus CAE User s Manual e What can I do with the associative interfaces Section 10 1 2 6 ANALYSIS PROCEDURES Analysis procedures This chapter discusses features related to defining an analysis It provides an overview of the following enhancements 6 1 Abaqus CFD analysis Section 6 1 Incompressible fluid dynamics Section 6 2 Abaqus CFD to Abaqus Standard or to Abaqus Explicit co simulation Section 6 3 Iterative equation solver Section 6 4 Dynamics enhancements Section 6 5 Contour integral evaluation improvements Section 6 6 Continued development of the XFEM based crack propagation capability Section 6 7 Enhancements in Abaqus Standard to Abaqus Explicit co simulation Section 6 8 Global damping and damping controls in matrix and substructure generation procedures Section 6 9 Damping controls in substructure property definition Section 6 10 Improved integration scheme in random response analysis Section 6 11 Use of
141. ion 6 9 Section 6 10 Section 6 11 Section 6 12 Section 6 13 Section 6 14 Section 6 15 Section 6 16 Section 6 17 Section 6 18 Section 6 19 Section 6 20 Section 6 21 Section 7 5 Section 7 6 Section 7 7 Section 7 8 Section 7 9 Section 7 12 Section 7 13 Parallel ordering for the direct sparse solver Thread parallel element and contact search calculations for implicit dynamic analyses Thread parallel element operations for quasi static analyses Enhanced support for translation of Nastran bulk data files Enhancements to distributions of orientations Model import from ANSYS input files Abaqus CFD to Abaqus Standard or to Abaqus Explicit co simulation Iterative equation solver Dynamics enhancements Contour integral evaluation improvements Continued development of the XFEM based crack propagation capability Enhancements in Abaqus Standard to Abaqus Explicit co simulation Global damping and damping controls in matrix and substructure generation procedures Damping controls in substructure property definition Improved integration scheme in random response analysis Use of arbitrary dynamic modes for substructure generation Enhancements to coupled structural acoustic analysis Enhancements to steady state dynamics user interface Direct cyclic analysis in Abaqus CAE AMS eigensolver performance improvements Random response analysis based on the SIM architecture Submodeling based on the driven nodes only found lying within t
142. ion based on the cohesive segments method or based on the principles of linear elastic fracture mechanics LEFM To reduce run time for large analyses parallel execution of element operations is now available Description XFEM allows you to model crack growth without remeshing the crack surfaces since it does not require the mesh to match the geometry of the crack Several new damage initiation criteria based on the quadratic nominal stress strain or based on the maximum nominal stress strain are supported You can specify if the newly introduced crack will be orthogonal to the element local 1 or 2 direction in the enriched elements The XFEM capability can be performed by using the implicit dynamic procedure to simulate the fracture and failure in a structure under high speed impact loading The XFEM based crack propagation simulated in an implicit dynamic procedure can also be followed or preceded by a static procedure to model the damage and failure throughout the loading history In addition to the existing XFEM based cohesive segments method which is a very general interaction modeling capability for brittle or ductile fracture an alternative approach to modeling crack propagation is available based on the principles of linear elastic fracture mechanics LEFM within the framework of XFEM This approach is more appropriate for brittle fracture problems Parallel execution of element operations is available through MPI based parallelization for an
143. ion of this manual 13 8 Combining data from multiple output databases Products Abaqus Standard Abaqus Explicit Abaqus CFD Abaqus CAE 13 6 OUTPUT AND VISUALIZATION Benefits You can now combine model data and results data from two or more output databases into a new output database This enhancement provides improved postprocessing for data from analyses that typically generate multiple output databases such as analyses of models with substructures and co simulation analyses Description The Combine ODBs plug in and the abaqus odbcombine execution procedure enable you to combine postprocessing data from multiple output database odb files When you combine output databases Abaqus creates a new output database file that contains all of the model data in every output database you specify However for results data the data that Abaqus includes in the new combined output database are subject to your filtering selections and your choice of master output database e You can filter the data that the plug in includes in the combined output database to include results only from selected steps or frames from selected output variables or from a combination of these options For example a filter can enable you to include results data only from the last step and the last frame of the specified output databases and the same filter can dictate that only Mises stress results are included in the combined output database You can also establish multipl
144. ional fluid part can be flexibly designed as an extruded revolved or swept sketch in Abaqus CAE Fluid sections are used to define the properties of a fluid part in an Abaqus CFD model The section assigns material properties to a fluid part Abaqus CAE Usage Part module Part Create Type Fluid Property module Section Create Category Fluid References Abaqus CAE User s Manual e Using the Create Part dialog box to define the properties of a part Section 11 19 1 in the online HTML version of this manual e Creating homogeneous fluid sections Section 12 12 12 in the online HTML version of this manual 4 5 Topology tracking in the Sketcher Product Abaqus CAE Benefits When you edit the sketch for a feature and regenerate the model Abaqus CAE now tracks the changes such that attributes are reassigned to the new topology Description In previous releases of Abaqus user defined attributes such as loads boundary conditions sets surfaces and mesh control parameters often lost their association with geometry when the sketch for the feature was modified Abaqus CAE now automatically tracks the sketch and the generated geometric topology such that attributes can retain their association when the features are regenerated The new enhanced tracking is applied to all new geometric features created in Abaqus 6 10 Existing features from models created in previous releases will retain the older behavior to prevent
145. it AIX Power ftp Analysis products For current and complete details on supported Abaqus products and platforms including platform information for add on products interfaces and translators refer to the Abaqus systems information available through the Support page at www simulia com For more information see Appendix A System requirements of the Abaqus Installation and Licensing Guide The remaining chapters in this book provide details on these and other new features of Abaqus 6 10 In addition to the enhancements listed here most of the known bugs in Abaqus 6 9 are corrected 1 2 Abaqus products Companies at all levels in the supply chain recognize finite element analysis as a strategic technology virtual prototyping enables creation of better products at lower cost and shortened time to market Such companies are seeking to further leverage their investments in virtual prototyping by adopting best practices processes and tools in an integrated environment where engineers can readily share methods models and results Abaqus products are driven by SIMULIA s vision of Unified FEA to deliver best in class solutions for a wide range of simulations within the framework of a common data structure SIMULIA s goal is to streamline INTRODUCTION TO Abaqus 6 10 and democratize realistic simulation across engineering disciplines offering a scalable suite of finite element software that can be applied effectively by a wi
146. itions Description The equation of state models in Abaqus Explicit can now be used in conjunction with the extended Drucker Prager plasticity models to model pressure dependent plastic behavior In this case the material s volumetric response is governed by the equation of state model while the deviatoric response is 7 10 MATERIALS MB Edit Material x Name Material 1 Description Se Edit m Material Behaviors Low Density Foam General Mechanical Thermal Other Delete Low Density Foam Strain rate measure Volumetric Principal v Uniaxial Test Data a Extrapolate stress strain curve beyond maximum strain rate Maximum allowable principal tensile stress F Remove elements exceeding maximum alpha mu0 mul Relaxation coefficients 0 0001 0 005 z OK Cancel Figure 7 2 Defining a low density foam material governed by the pressure dependent plasticity model This approach can be appropriate for modeling the response of ceramics and other brittle materials under high velocity impact conditions 7 11 MATERIALS Abaqus CAE Usage Property module Material editor Mechanical Eos Mechanical Elasticity Elasticity Type Shear Mechanical Plasticity Drucker Prager Suboptions Drucker Prager Hardening References Abaqus Analysis User s Manual e Extended Drucker Prager models Section 20 3 1 e Equation of state Section 22 2 1 Ab
147. ity References Abaqus Analysis User s Manual e Mohr Coulomb plasticity Section 20 3 3 Abaqus CAE User s Manual e Defining Mohr Coulomb plasticity in Defining plasticity Section 12 9 2 in the online HTML version of this manual Abaqus Keywords Reference Manual e MOHR COULOMB e MOHR COULOMB HARDENING Abaqus Benchmarks Manual e Concrete slump test Section 1 1 10 e Limit load calculations with granular materials Section 1 15 4 e Finite deformation of an elastic plastic granular material Section 1 15 5 Abaqus Verification Manual e Rate independent plasticity Section 2 2 9 Abaqus Theory Manual e Mohr Coulomb model Section 4 4 5 7 2 Critical state clay plasticity model in Abaqus Explicit Products Abaqus Explicit Abaqus CAE Benefits The clay plasticity model which can be used to model cohesionless soil behavior in geotechnical applications is now available in Abaqus Explicit Description Abaqus Explicit now provides the clay plasticity model that previously was available only in Abaqus Standard The constitutive model is an extension of the critical state models originally developed by Roscoe and his coworkers at Cambridge The model describes the inelastic behavior of the material by a yield function that depends on the three stress invariants an associated flow assumption to define the plastic strain rate and a strain hardening theory that changes the size of t
148. ity in Abaqus Explicit 7 4 Transferring results with concrete damaged plasticity 7 5 Finite strain viscoelasticity 7 6 Finite strain viscoelasticity with Mullins effect 7 7 Field expansion 7 8 Viscous dissipation in a coupled analysis 7 9 Low density foam materials in Abaqus CAE 7 10 Combining equations of state with pressure dependent shear plasticity in Abaqus Explicit 7 11 Johnson Cook plasticity in Abaqus Standard 7 12 Enhancements to Johnson Cook strain rate dependence 7 13 Tension cutoff 7 14 Ignition and growth equation of state 7 15 Specifying a constant pressure specific heat in Abaqus CFD 7 16 8 Elements Support for cylindrical elements in Abaqus CAE 8 1 Coupled temperature pore pressure elements in Abaqus Standard 8 2 Linear pipe elements in Abaqus Explicit 8 3 Fluid elements in Abaqus CFD 8 4 9 Prescribed conditions Eulerian mesh motion in Abaqus Explicit 9 1 Eulerian boundary conditions in Abaqus CAE 9 2 Reading nodal output for temperature normalized concentration and electric potential from an output database into predefined field variables 9 3 CONWEP blast loading in Abaqus Explicit 9 4 Enhancements to initial conditions 9 5 Plotting amplitude data 9 6 xi CONTENTS 10 Constraints 11 12 Creating a planar constraint Interactions Eulerian surfaces in Abaqus CAE Pressure penetration in Abaqus CAE General contact performance General contact diagnostics Visualizing initial strain free adjust
149. l direction vectors for a composite layup Description Abaqus CAE now enables you to display or hide individual direction vectors for the plies in a composite layup You can display the 1 direction from the layup orientation to show the rotation of the ply s material directions Figure 4 6 shows an example of the new functionality on a simple composite layup Name CompositeLayup 1 Element type Conventional Shell Description Layup Orientation Definition coordinate system x A Create Datum csys 2 Select A create Normal direction Axis1 C Axis2 xis 3 Additional rotation None C Angle fo C Distribution E A create Section integration During analysis Before analysis Thickness integration rule Simpson Gauss pies offset shellParameters Display Highlight ply regions On C Off Orientation display Ply Layup C None Show orientation directions V 1 V 2 I 3 Normal IV Layup Orientation 1 Figure 4 6 Display of individual direction vectors on a composite layup Abaqus CAE Usage Property module Composite Create Display tabbed page Show orientation directions options Reference Abaqus CAE User s Manual e Creating solid composite layups Section 12 13 4 in the online HTML version of this manual 4 15 MODELING 4 18 Enhancements to orientations for material orientations and composite layups Product Abaqus CAE Benefits The abilit
150. l execution Model types in Abaqus CAE Midsurface modeling View cuts in Abaqus CAE Modeling enhancements for Abaqus CFD Topology tracking in the Sketcher Three dimensional sweep paths for swept features Selection of individual faces for repair of face normals Geometry repair for shells and solid parts that contain multiple cells New tools for editing or repairing faces Improvements to repair of small edges and small faces Automatic validity check after geometry edits Stitching gaps in non manifold parts Enhanced support in Abaqus CAE for modeling fracture mechanics using XFEM Ability to select attachment points for additional modeling tasks Enhancements to distributions of orientations Control over individual vector display in continuum shell composite layups Enhancements to orientations for material orientations and composite layups Querying mass properties for beams and trusses Querying for disjoint ply regions Querying for regions missing section assignments Enhancements to the Datum toolset Rendering of shell thickness Hiding annotations Quick display buttons for all datum geometry viewport annotations free body cuts and attributes Specifying the universal gas constant Streamlined part and assembly import from Elysium Neutral files Model import from ANSYS input files Running CAD software in the background after changes to CAD parameters Automatic geometry repair during part import Import and export of model data
151. l general section stiffnesses in an Abaqus Explicit analysis SHELL SECTION You can now define distributions of composite layer angles in an Abaqus Explicit analysis SOILS Use the new HEAT parameter to specify if heat transfer is to be modeled when this procedure is used with the new family of coupled temperature pore pressure elements Use the new DELTMX parameter to invoke automatic time incrementation and to specify the maximum temperature change allowed within an increment SOLVER CONTROLS You can no longer specify the number of domains used by the iterative linear equation solver SPECIFIC HEAT The new PORE FLUID parameter has been added to allow specification of the specific heat of the pore fluid in a geostatic or soils consolidation analysis that models heat transfer in a fully coupled manner with the pore fluid flow and the mechanical deformations 16 10 mod S mod S mod S E mod S E new S E mod E mod E new E SUMMARY OF CHANGES STEADY STATE DYNAMICS A new value is available for the INTERVAL parameter Set INTERVAL SPREAD to define frequency points spread around eigenfrequencies STEP A new value is available for the SOLVER parameter Set SOLVER ITERATIVE to use the iterative linear equation solver The SOLVER DDM setting is no longer available SUBMODEL Use the new INTERSECTION ONLY parameter to specify that Abaqus ignore submodel driven nodes that are found to lie outsi
152. l heat source Section 1 15 7 Abaqus Verification Manual 8 3 Continuum pore pressure elements Section 1 4 7 Pore pressure submodeling Section 3 6 12 Pore thermal model change Section 3 8 9 TIE Section 5 1 26 Coupled pore thermal elements Section 5 1 27 Linear pipe elements in Abaqus Explicit Product Abaqus Explicit Benefits The linear pipe elements already available in Abaqus Standard are now implemented in Abaqus Explicit These elements differ from the regular beam elements with a pipe cross section as pressure loads from the internal surrounding fluids can be prescribed and are taken into account in the constitutive response of the material Therefore the pipe elements are useful for modeling pipes carrying fluids under pressure and or submerged in fluids ELEMENTS Description The elements PIPE31 and PIPE21 are now available in Abaqus Explicit The formulation assumes a closed end condition i e an internal pressure load elongates the pipe as the ends are closed An open end condition can be simulated by specifying an axial end force to relieve the axial loading from the pipe pressure load All loading options currently available for beams are also supported for the pipes GRAV PX PYNU P1 P2NU and incident wave loading In addition the pressure loads from internal and or external fluid PI PE PINU PENU HPI and HPE are also supported The material behavior can i
153. lerian surfaces are created by default for each Eulerian material instance in the INTERACTIONS model the Eulerian materials appear in the second column of the Edit Included Pairs and Edit Excluded Pairs dialog boxes as shown in Figure 11 1 You can also include or exclude contact between two Lagrangian surfaces but you cannot include or exclude contact between two Eulerian materials M Select Pairs Alt Self Ball 1 Lagrangian_Surf_1 Ball 1 Lagrangian_Surf_1 Air_Inst Nater_Inst Figure 11 1 Eulerian material instances in the Edit Excluded Pairs dialog box In addition to including or excluding Eulerian contact surfaces you can specify unique contact properties between particular Lagrangian surfaces and particular Eulerian material instances The Eulerian material instances are listed in the Edit Individual Contact Property Assignments dialog box You cannot specify contact properties between two Eulerian material instances Abaqus CAE Usage Interaction module General contact editor Included surface pairs Selected surface pairs Edit Excluded surface pairs Edit Individual property assignments Edit References Abaqus Analysis User s Manual e Eulerian analysis Section 13 1 1 Abaqus CAE User s Manual e Defining general contact Section 15 13 1 in the online HTML version of this manual e Specifying and modifying contact property assignments for general contact Section 15 1
154. licious deceptive or unlawful programs or modify or distribute the source code of the software so that any part of it becomes subject to an Excluded License An Excluded License is one that requires as a condition of use modification or distribution that the code be disclosed or distributed in source code form or others have the right to modify it 3 Scope of License The software is licensed not sold This agreement only gives you some rights to use the software Microsoft reserves all other rights Unless applicable law gives you more rights despite this limitation you may use the software only as expressly permitted in this agreement In doing so you must comply with any technical limitations in the software that only allow you to use it in certain ways You may not work around any technical limitations in the software reverse engineer decompile or disassemble the software except and only to the extent that applicable law expressly permits despite this limitation make more copies of the software than specified in this agreement or allowed by applicable law despite this limitation e publish the software for others to copy rent lease or lend the software transfer the software or this agreement to any third party except as permitted in Section 2 or use the software for commercial software hosting services BACKUP COPY You may make one backup copy of the software You may use it only to reinstall
155. load balancing are activated as needed e Arbitrary Lagrangian Eulerian ALE adaptive meshing for deforming meshes and moving boundary problems e Restart recovery and continuation within a subsequent step e Multistep analysis to model laminar to turbulent flow e Turbulence models include implicit large eddy simulation ILES and Spalart Allmaras steady state and transient and provide full support for turbulent energy transport Abaqus CAE Usage Step module Create Step General Flow References Abaqus Analysis User s Manual e Incompressible fluid dynamic analysis Section 6 6 2 Abaqus CAE User s Manual e Configuring a flow procedure in Configuring general analysis procedures Section 14 11 1 in the online HTML version of this manual 6 3 Abaqus CFD to Abaqus Standard or to Abaqus Explicit co simulation Products Abaqus Standard Abaqus Explicit Abaqus CFD Abaqus CAE Benefits You can now use the co simulation technique to couple an Abaqus CFD analysis to an Abaqus Standard or Abaqus Explicit analysis This enhancement provides the ability to perform fluid structure interaction e g modeling flow in Abaqus CFD and structural deformation in ANALYSIS PROCEDURES Abaqus Standard and conjugate heat transfer e g modeling flow using the energy equation with natural convection in Abaqus CFD and heat transfer in Abaqus Standard Description For Abaqus CFD to Abaqus Standard or Abaqus Explicit
156. lysis Product Abaqus Standard Benefits You can obtain more accurate RMS values of responses at the starting and intermediate frequencies ANALYSIS PROCEDURES Description The integration of generalized response power spectral density PSD in random response has been modified to yield more accurate variances and consequently more accurate RMS responses at starting and intermediate frequencies This also results in zero values for RMS responses at the starting frequency The previous integration scheme provided approximate RMS responses at all frequencies but the last one Therefore a nonzero value was observed at the first frequency References Abaqus Analysis User s Manual e Random response analysis Section 6 3 11 Abaqus Theory Manual e Random response analysis Section 2 5 8 6 12 Use of arbitrary dynamic modes for substructure generation Product Abaqus Standard Benefits The substructure retained degrees of freedom no longer have to be constrained in the frequency extraction step Description Free or mixed interface eigenmodes can now be selected to generate a dynamic substructure You can get a better approximation of the model s dynamic response with fewer dynamic modes when using free or mixed interface eigenmodes as compared to using a fixed interface The dynamic substructure also enables retention of nodes from the cloud of a distributing coupling References Abaqus Analysis User
157. lysis User s Manual e Using the SIM architecture for modal superposition dynamic analyses in Dynamic analysis procedures overview Section 6 3 1 e Random response analysis Section 6 3 11 Abaqus Theory Manual e Random response analysis Section 2 5 8 6 18 Submodeling based on the driven nodes only found lying within the global model Products Abaqus Standard Abaqus Explicit Benefits When using the solid to solid submodeling option you can now specify that Abaqus ignore driven nodes found to lie outside the bounds of elements in the global model Description In some submodeling cases such as when your submodel geometry is more detailed than the global model in regions near a free surface you may specify driven nodes that Abaqus will find even when accounting for the search tolerance to be outside the region of the global model elements These cases by default result in an error message You may decide that from a modeling perspective ignoring 6 20 ANALYSIS PROCEDURES these nodes is reasonable and you now can specify that Abaqus is to ignore nodes not found In this case subsequent submodel boundary condition definitions referring to node sets will exclude any nodes not found from submodel boundary condition application References Abaqus Analysis User s Manual e Node based submodeling Section 10 2 2 Abaqus Keywords Reference Manual e SUBMODEL Abaqus Verification Manu
158. mance may degrade in some cases It is expected that the parallel ordering procedure will improve overall performance of Abaqus Standard in the majority of large analyses For cases where this is not true and performance is negatively impacted this feature can be disabled using the command line or environment file parameter order_parallel OFF References Abaqus Analysis User s Manual e Using the Abaqus environment settings Section 3 3 1 e Parallel execution in Abaqus Standard Section 3 5 2 3 2 Thread parallel element and contact search calculations for implicit dynamic analyses Product Abaqus Standard 3 1 EXECUTION Benefits Thread parallel execution of additional calculations provides improved performance for many dynamic analyses Description Dynamic analyses with moderate dissipation and quasi static application settings now execute element and contact search calculations with thread based parallelization among processors of a compute node which is similar to the existing behavior for static and other procedure types In previous Abaqus releases these calculations were performed on only one processor per compute node for the implicit general dynamic procedure References Abaqus Analysis User s Manual e Parallel execution in Abaqus Standard Section 3 5 2 Abaqus Keywords Reference Manual e DYNAMIC 3 3 Thread parallel element operations for quasi static analyses Product Abaqus Standard Ben
159. mass properties of beams and trusses using the Query toolset You can query the mass properties of an entire part an entire assembly selected part instances or selected mesh entities In the Visualization module you can query the mass properties of elements part instances element sets sections materials element types or display groups Abaqus CAE Usage All modules except the Job module Tools Query Mass properties 4 16 MODELING References Abaqus CAE User s Manual e Overview of Query toolset in the Visualization module Section 48 1 e Querying mass properties Section 69 2 3 in the online HTML version of this manual 4 20 Querying for disjoint ply regions Product Abaqus CAE Benefits You can now easily identify disjoint plies in a composite layup Description The new Disjoint ply regions query displays in the message area the names of the composite layups and the plies within them that contain disjoint regions Abaqus CAE Usage Property module Tools Query Disjoint ply regions Reference Abaqus CAE User s Manual e Using the Query toolset to obtain assignment information Section 12 17 in the online HTML version of this manual 4 21 Querying for regions missing section assignments Product Abaqus CAE Benefits You can query for regions of a part that require section assignments Description The new Regions missing sections query highlights any part regions that require section
160. ments User specified interference fit distance and user specified initial clearance distance for general contact Contact stabilization controls for general contact Support for element and contact pair removal and reactivation in Abaqus CAE VCCT in Abaqus Explicit User defined range for which contact opening output is provided Smooth transition of the allowable elastic slip Midface node no longer added for serendipity elements involved in surface to surface contact pairs Controlling smoothness of the redistribution of contact forces upon sliding for surface to surface contact Beam contact thickness in Abaqus Explicit Progressive viewfactor calculation Display of connector section assignment tags Coincident Point Builder Support for position tolerance and adjustment of the slave surface initial position for cyclic symmetry interactions in Abaqus CAE Meshing Mapped meshing performance Mesh verification queries and saved sets Improvements to adaptive remeshing Tetrahedral meshing enhancements Mesh seeding enhancements Global node and element renumbering of meshed parts or part instances Local node and element renumbering of orphan mesh parts Numbering merged nodes Preserving node and element labels in the input file Editing the mesh of a dependent part instance Selecting by feature edge Mesh retained on native parts upon model database upgrade xii 11 1 11 2 11 3 11 4 11 5 11 6 11 7 11 8 11 9 11 10
161. model the shock initiation and the detonation wave propagation of high energy solid explosives Description The ignition and growth model is a phenomenological model in which the heterogeneous explosive is modeled as a homogeneous mixture of two phases the unreacted solid explosive and the reacted gas products Separate JWL equations of state are prescribed for each phase and a single reaction rate law is prescribed for the conversion of the explosive to products Abaqus CAE Usage Property module Material editor Mechanical Eos Type Ignition and growth References Abaqus Analysis User s Manual e Ignition and growth equation of state in Equation of state Section 22 2 1 Abaqus CAE User s Manual e Defining equations of state in Defining other mechanical models Section 12 9 4 in the online HTML version of this manual Abaqus Keywords Reference Manual e EOS e GAS SPECIFIC HEAT e REACTION RATE 7 16 Specifying a constant pressure specific heat in Abaqus CFD Products Abaqus CFD Abaqus CAE 7 15 MATERIALS Benefits The ability to specify a constant pressure specific heat allows you to perform thermal flow problems using the energy equation Description You now have the choice of specifying a constant pressure or a constant volume specific heat for a material model in an Abaqus CFD analysis The constant pressure specific heat is required when the energy equation is used for thermal flow p
162. mping altogether References Abaqus Analysis User s Manual e Defining substructures Section 10 1 2 e Generating global matrices Section 10 3 1 ANALYSIS PROCEDURES Abaqus Keywords Reference Manual e DAMPING CONTROLS e GLOBAL DAMPING e MATRIX GENERATE e SUBSTRUCTURE GENERATE 6 10 Damping controls in substructure property definition Product Abaqus Standard Benefits You can control the content of viscous and structural damping matrices in a substructure at the substructure usage stage Description The default settings when applying damping controls in a substructure are now consistent with the defaults used in standard analysis step definitions the default damping in a substructure includes a combination of all specified viscous and structural damping contributions Averaged stiffness and mass proportional damping factors are no longer calculated during generation of a substructure the default value for these factors is now zero You can add stiffness or mass proportional damping contributions to a substructure by directly specifying these factors as part of the substructure property definition References Abaqus Analysis User s Manual e Using substructures Section 10 1 1 e Defining substructures Section 10 1 2 Abaqus Keywords Reference Manual e DAMPING e DAMPING CONTROLS e SUBSTRUCTURE GENERATE e SUBSTRUCTURE PROPERTY 6 11 Improved integration scheme in random response ana
163. mport options in Abaqus CAE Description Abaqus now enables you to translate selected entities inan ANSYS input file to their equivalent entities in Abaqus You run the abaqus fromansys execution procedure from the command line to perform this translation and create an Abaqus input file The Import Model dialog box now allows you to select ANSYS model database cdb files and import their data into a new model in Abaqus CAE Abaqus CAE Usage All modules File Import Model File Filter Ansys Input File cdb References Abaqus Analysis User s Manual e Translating ANSYS input files to Abaqus input files Section 3 2 23 Abaqus CAE User s Manual e Importing a model from an ANSYS input file Section 10 5 5 5 3 Running CAD software in the background after changes to CAD parameters Product Abaqus CAE Benefits When you use the Pro ENGINEER Associative Interface to exchange CAD data between Abaqus CAE and Pro ENGINEER you can now keep Pro ENGINEER software running in the background after you make a change to the geometry parameters in the imported model This enhancement provides better performance during bidirectional parameter update if you perform several consecutive parameter updates Description The CAD Parameters dialog box now includes an option that enables you to keep CAD software running in the background after you make a change to the geometry parameters in the imported model Keeping CAD software
164. n discrete fields is now an order of magnitude faster e Improved connector performance is available in Abaqus CAE for models created with this release These improvements are most significant in models that contain hundreds of connectors You can now create and display large numbers of connectors and fasteners more quickly e You can create sets and surfaces more quickly 5 GENERAL ENHANCEMENTS 2 6 Section assignment is now faster and section assignments load more quickly in the Section Assignment Manager dialog box Abaqus CAE now loads large model databases more quickly Abaqus CAE provides better performance for models with hundreds of steps or more Loading of output databases is now faster Performance has improved for running animations displaying glyphs and manipulating views during postprocessing Usability enhancements in Abaqus CAE Product Abaqus CAE Benefits Enhancements for managing model databases and objects displaying models and exchanging data improve the usability of Abaqus CAE Description Several enhancements are now provided to reduce model database size copy model objects improve model display and extend support for exchanging data Abaqus CAE includes the following usability enhancements You can compress the file size of the current model database When you copy a named object the default name for the new object now differs from the original object name Copy is appended to the object name
165. nclude elasticity with or without plasticity Material damping is supported Alternatively the material behavior can be user defined Element based features such as mass scaling and non structural mass are supported The hoop stress generated from the prescribed pipe pressure loads is now reported as part of the stress output The section definition for pipe elements in Abaqus Explicit must be defined using the BEAM SECTION option References Abaqus Analysis User s Manual e Beam element library Section 26 3 8 Abaqus Keywords Reference Manual e BEAM SECTION e ELEMENT Abaqus Example Problems Manual e Parametric study of a linear elastic pipeline under in plane bending Section 1 1 3 Abaqus Verification Manual e Initial curvature of beams and shells Section 1 3 11 e Simple tests of beam kinematics Section 1 3 27 e Abaqus Explicit element loading verification Section 1 4 15 e Incident wave loading Section 1 4 16 e Nonstructural mass verification Section 1 11 9 e Temperature dependent elastic materials Section 2 2 5 e Field variable dependent elastic materials Section 2 2 6 e Temperature dependent inelastic materials Section 2 2 13 e Field variable dependent inelastic materials Section 2 2 14 e Thermal expansion test Section 2 2 32 e Linear kinematics element tests Section 3 2 6 e VDLOAD nonuniform loads Section 4 1 29 e VUSDFLD
166. nctionality Maintenance Deliveries are software updates that address known issues but generally do not introduce enhancements or new functionality Abaqus Extended Functionality Releases provide early access to a subset of the new functionality that will be introduced in the next numbered Release Consistent with the format used by other Dassault Syst mes brands for designating releases Abaqus Software is designated by Version and Release as Abaqus 6 n Abaqus 6 n is not a new Version but is a new Release Similarly Abaqus 6 n 3 refers to Version 6 Release n Maintenance Delivery 3 When the Abaqus Maintenance Delivery number is omitted in written communications the reference is interpreted to mean the general release which is referenced in the code as Abaqus 6 n 1 Extended Functionality Releases are designated by an EF suffix after the Release number This documentation and the software described in this documentation are subject to change without prior notice No part of this documentation may be reproduced or distributed in any form without prior written permission of Dassault Syst mes or its subsidiary The Abaqus Software is a product of Dassault Systemes Simulia Corp Providence RI USA Dassault Syst mes 2010 Abaqus the 3DS logo SIMULIA CATIA and Unified FEA are trademarks or registered trademarks of Dassault Syst mes or its subsidiaries in the United States and or other countries Other company product and service names ma
167. nd involve complex geometry can be simulated with Abaqus CFD This includes flow problems induced by spatially varying distributed body forces e Problems that involve heat transfer and require an energy equation and that may involve buoyancy driven flows i e natural convection can also be solved with Abaqus CFD This type of problem includes turbulent heat transfer for a broad range of Prandtl numbers e Abaqus CFD includes the ability to perform deforming mesh analyses using an arbitrary Lagrangian Eulerian ALE description of the equations of motion heat transfer and turbulent transport Deforming ANALYSIS PROCEDURES mesh problems may include prescribed boundary motion that induces fluid flow or FSI problems where the boundary motion is relatively independent of the fluid flow The general capabilities of the incompressible pressure based flow solver include the following e Hybrid FVM finite volume method and FEM approach for laminar and turbulent flows e Time accurate methods e Scalable parallel linear equation solvers include Krylov solvers for transport equations momentum turbulence energy etc and algebraic multigrid AMG preconditioned Krylov solvers for pressure Poisson equations e Energy equation for thermal analysis provides temperature based energy equation and buoyancy driven flows natural convection e Domain based parallelism i e message passing paradigm where parallel domain decomposition and dynamic
168. ng a model database or an output database Section 9 7 2 in the online HTML version of this manual e Producing an overlay plot Section 76 2 1 in the online HTML version of this manual 2 9 Linking field output across viewports Product Abaqus CAE Benefits You can now set up linked viewports so that they display results from the same field output variable Description The linked viewports functionality in Abaqus CAE now enables you to synchronize the field output variable that is displayed across linked viewports When you select a new field output variable for one of the linked viewports Abaqus CAE updates the field output variable for all other linked viewports provided the output database displayed in the linked viewport includes results data for the new field output variable Abaqus CAE Usage Visualization module Viewport Linked Viewports Field output Reference Abaqus CAE User s Manual e Linking viewports Section 4 5 2 in the online HTML version of this manual 2 10 Accessing plot display customization options from the Visualization module toolbox Product Abaqus CAE Benefits A new tool provides quicker access to the plot display customization options Description You can use the new 8 tool that is available in the Visualization module toolbox to display the ODB Display Options dialog box for customizing plot display References Abaqus CAE User s Manual e What are toolboxes and toolbars
169. ng elasticity Section 12 9 1 in the online HTML version of this manual Abaqus Keywords Reference Manual e ELASTIC e VISCOELASTIC Abaqus Verification Manual e Viscoelastic materials Section 2 2 2 Abaqus Theory Manual e Viscoelasticity Section 4 8 1 7 5 Transferring results with concrete damaged plasticity Products Abaqus Standard Abaqus Explicit Benefits Results of analyses that include the concrete damaged plasticity material can now be transferred from Abaqus Standard to Abaqus Explicit and vice versa Description The state of the concrete damaged plasticity model can now be imported between analyses in Abaqus Standard and Abaqus Explicit References Abaqus Analysis User s Manual e Transferring results between Abaqus analyses overview Section 9 2 1 e Concrete damaged plasticity Section 20 6 3 7 5 MATERIALS Abaqus Keywords Reference Manual e CONCRETE DAMAGED PLASTICITY e IMPORT Abaqus Example Problems Manual e Seismic analysis of a concrete gravity dam Section 2 1 15 Abaqus Verification Manual e Concrete damaged plasticity Section 2 2 24 7 6 Finite strain viscoelasticity Products Abaqus Standard Abaqus Explicit Benefits When large strain viscoelasticity is used with hyperelasticity Abaqus provides a new formulation that is appropriate for rubberlike solids This formulation was available in Abaqus 6 9 with some limitations In this release the fo
170. nimum size 1 1 Maximum size 5 5 Flip bias Select Minimum and maximum element size Reverse direction of biased seeding M Set Creation I Create set with name Edge Seeds 1 OK Apply Defaults Cancel Figure 12 5 Controlling mesh seeding Abaqus CAE Usage Mesh module Seed Edges References Abaqus CAE User s Manual e Understanding seeding Section 17 4 e Seeding a model Section 17 15 in the online HTML version of this manual 12 8 MESHING 12 6 Global node and element renumbering of meshed parts or part instances Product Abaqus CAE Benefits You can now specify the range of the node and or element labels of a native part or of selected independent part instances in the assembly This allows you to have a consistent node and element labeling for your parts and simplifies collaboration between engineers working on separate parts that will be assembled before being analyzed by Abaqus Description The Edit Mesh toolset now allows you to change the node and or element labels of a native part or of selected independent part instances in the assembly You enter the start labels and Abaqus CAE changes the node and element labeling while preserving the original order and incrementation You can change the labels before or after Abaqus CAE generates the mesh Figure 12 6 shows the Global Numbering Control dialog box Mf Global Numbering Control X Start Label
171. nput file to Nastran bulk data file format abaqus toOutput2 translates an Abaqus output database file to the Nastran Output2 file format abaqus tozaero enables you to exchange aeroelastic data between the Abaqus and ZAERO analysis products Other utilities e Additional programs are included with the release They are all invoked through the Abaqus execution procedure the driver The utilities and the commands to invoke these programs are described below abaqus append joins separate results files into a single file abaqus ascfil translates Abaqus results files between ASCII and binary formats which is useful for moving results files between different computer types abaqus doc accesses the HTML Abaqus documentation collection using a web browser abaqus encrypt creates an encoded password protected version of an Abaqus input file while abaqus decrypt converts an encrypted file back into its original unencoded format abaqus fetch extracts example input files from the libraries included with the release abaqus findkeyword provides a list of sample problems that use the specified Abaqus options This utility can help users find examples of features they may be using for the first time abaqus free converts all fixed format data in an input file to free format abaqus licensing provides a summary of Abaqus license usage reporting and the available FLEXnet Licensing utilities abaqus make compiles and links user written post
172. ns This section summarizes the changes and the additions that have been made to the options that define an Abaqus model mod S ACOUSTIC FLOW VELOCITY This option can now be used only in linear perturbation analyses mod S BASE MOTION In steady state dynamic analysis the LOAD CASE parameter has been replaced by the REAL and IMAGINARY parameters to define real and imaginary loading mod S BOUNDARY In steady state dynamic analysis the LOAD CASE parameter has been replaced by the REAL and IMAGINARY parameters to define real and imaginary loading mod E CAST IRON COMPRESSION HARDENING This option can now be used in Abaqus Explicit to define the compression hardening data for the gray cast iron plasticity model 16 2 mod E mod E mod S mod S mod E mod E mod S mod S mod S mod S mod E SUMMARY OF CHANGES CAST IRON PLASTICITY This option can now be used in Abaqus Explicit to define the plastic properties for the gray cast iron plasticity model CAST IRON TENSION HARDENING This option can now be used in Abaqus Explicit to define the tension hardening data for the gray cast iron plasticity model CECHARGE In steady state dynamic analysis the LOAD CASE parameter has been replaced by the REAL and IMAGINARY parameters to define real and imaginary loading CHANGE FRICTION For the default Coulomb friction model employing the penalty method amplitude curves can now be used
173. ntour limits for an animation based on results from all frames in addition to the first and last frames the current frame or the recomputed limits of each individual frame options Abaqus CAE Usage Visualization module Options Contour Limits tabbed page When auto computing animation limits Use limits from all frames Reference Abaqus CAE User s Manual e Controlling how Abaqus CAE computes contour limits Section 42 4 9 in the online HTML version of this manual 13 16 Total time display for time history animation Product Abaqus CAE Benefits Abaqus CAE now displays the total elapsed time for a time history animation This enhancement is particularly useful for animations involving multiple steps Description The total elapsed time in a time history animation is now displayed along with the step and frame in the viewport as shown in Figure 13 8 Abaqus CAE Usage Visualization module Animate Time History Reference Abaqus CAE User s Manual e Time history animation Section 47 1 1 13 14 OUTPUT AND VISUALIZATION Step Step s Frame 16 Total Time 6 617911 Figure 13 8 Total time display in the viewport 13 15 USER SUBROUTINES UTILITIES AND PLUG INS 14 User subroutines utilities and plug ins This chapter discusses additional user programs that can be run with Abaqus It provides an overview of the following enhancements e Define viscous and structural matrices via u
174. odeling of volumetric expansion caused by physical effects that are similar to thermal expansion Field expansion strains are computed based on user specified field expansion coefficients that can be defined independently if needed for more than one field variable at a time and the change in the value of the corresponding predefined field variable about some reference value Similar to strains associated with thermal expansion field expansion strains can result in significant stresses in situations where the structure is constrained from undergoing free expansion This capability can be used to model the stresses due to the combined effects of thermal expansion and moisture absorption in microelectronic components The workflow is typically as follows 1 Carry out a heat transfer analysis to determine the temperature distribution in the component 2 Use these results to drive a mass diffusion analysis that computes the distribution of moisture concentration in the component Perform a stress displacement analysis to determine the stresses due to i thermal expansion associated with the temperature distribution and ii field expansion associated with the moisture concentration distribution where the field expansion is driven by the moisture concentration which is treated as a predefined field variable in the stress displacement analysis U You can find further details on importing the mass concentration as a predefined field variable in
175. oftware is distributed in Quebec Canada some of the clauses in this agreement are provided below in French Remarque Ce logiciel tant distribu au Qu bec Canada certaines des clauses dans ce contrat sont fournies ci dessous en frangais EXONERATION DE GARANTIE Le logiciel vis par une licence est offert tel quel Toute utilisation de ce logiciel est votre seule risque et p ril Microsoft n accorde aucune autre garantie expresse Vous pouvez b n ficier de droits additionnels en vertu du droit local sur la protection des consommateurs que ce contrat ne peut modifier La o elles sont permises par le droit locale les garanties implicites de qualit marchande d ad quation a un usage particulier et d absence de contrefa on sont exclues LIMITATION DES DOMMAGES INTERETS ET EXCLUSION DE RESPONSABILITE POUR LES DOMMAGES Vous pouvez obtenir de Microsoft et de ses fournisseurs une indemnisation en cas de dommages directs uniquement a hauteur de 5 00 US Vous ne pouvez pr tendre aucune indemnisation pour les autres dommages y compris les dommages sp ciaux indirects ou accessoires et pertes de b n fices Cette limitation concerne tout ce qui est reli au logiciel aux services ou au contenu y compris le code figurant sur des sites Internet tiers ou dans des programmes tiers et e les r clamations au titre de violation de contrat ou de garantie ou au titre de responsabilit stricte de n gligence ou d une autre
176. on you must define the previous model and the current model consistently The node and element numbering must be the same in both models If the models are defined in terms of an assembly of part instances part instance naming must be the same References Abaqus Analysis User s Manual e Initial conditions in Abaqus Standard and Abaqus Explicit Section 30 2 1 Abaqus Keywords Reference Manual e INITIAL CONDITIONS 9 6 Plotting amplitude data Product Abaqus CAE Benefits You can now display selected amplitude data in your model in an X Y plot PRESCRIBED CONDITIONS Description The Amplitude Plotter plug in enables you to create X Y plots showing the values in one or more of the amplitude definitions in your model Figure 9 2 shows the options in the new plug in and a sample X Y plot of two smooth step amplitude objects B viewport Amplitude Plotter Plot Amplitude Plotter 1 _temp_ap_Amp 2 _temp_ap_Amp 3 W Amplitude Plotter x Options T Min x value IV Max X value fis IT Save XY data as I Display plot legend Time Frequency Defaults Dismiss Figure 9 2 Amplitude Plotter plug in with smooth step amplitudes plotted The plug in supports data plotting for tabular equally spaced periodic modulated decay and smooth step amplitudes Plots include all baseline correction and smoothing data specified in the amplitude definition Multiple ampli
177. onstant as the profile travels along the sweep path e Maintain any faces or edges that are generated between the swept solid feature and the existing part The internal boundaries may create regions that can be structured or swept meshed without having to resort to partitioning Abaqus CAE Usage Part module Shape Solid Shell Cut Sweep References Abaqus CAE User s Manual e Defining the sweep path and the sweep profile Section 11 13 8 e Adding a swept solid feature Section 11 21 3 in the online HTML version of this manual e Adding a swept shell feature Section 11 22 3 in the online HTML version of this manual e Creating a swept cut Section 11 24 4 in the online HTML version of this manual 4 7 Selection of individual faces for repair of face normals Product Abaqus CAE Benefits You can now repair face normals for selected shell faces in a part which enables you to make the shell normals consistent for parts with either manifold or non manifold geometry Description The Repair Face Normals tool in the Geometry Edit toolset now includes an additional step in which you can choose to repair face normals for the entire part or for selected faces in the part You can select the faces whose normals you want to flip individually by face angle or by face curvature When you repair face normals by selecting faces individually Abaqus CAE flips the normals for the faces you select but does not attempt to
178. ontrols for general contact Section 11 7 Support for element and contact pair removal and reactivation in Abaqus CAE Section 11 8 VCCT in Abaqus Explicit Section 11 9 User defined range for which contact opening output is provided Section 11 10 Smooth transition of the allowable elastic slip Section 11 11 Midface node no longer added for serendipity elements involved in surface to surface contact pairs Section 11 12 Controlling smoothness of the redistribution of contact forces upon sliding for surface to surface contact Section 11 13 Beam contact thickness in Abaqus Explicit Section 11 14 Progressive viewfactor calculation Section 11 15 Display of connector section assignment tags Section 11 16 Coincident Point Builder Section 11 17 Support for position tolerance and adjustment of the slave surface initial position for cyclic symmetry interactions in Abaqus CAE Section 11 18 11 1 Eulerian surfaces in Abaqus CAE Product Abaqus CAE Benefits Eulerian surfaces allow you to specify unique interaction properties between a particular Lagrangian surface and a particular Eulerian material in coupled Eulerian Lagrangian analyses Description When creating a general contact definition for coupled Eulerian Lagrangian analyses in Abaqus CAE you can include or exclude interactions between particular Lagrangian surfaces and particular Eulerian surfaces The Eu
179. or mesh during the modeling process This enhancement provides a faster and easier option for positioning or verifying interior components of your model and for analyzing the interior element quality of your mesh Description Planar view cuts are now available in all Abaqus CAE modules other than the Sketch module view cut functionality was previously available only in the Visualization module The newly supported view cuts share much of the same functionality as the view cuts used in postprocessing e You can create and edit planar view cuts e You can translate or rotate a planar view cut to locate an area of interest in the interior of your model e View cuts persist only for your Abaqus CAE session regardless of the module in which they were created You can display the model below the cut on the cut or above the cut however outside the Visualization module you cannot display the below cut and above cut portions at the same time nor can you display free body cuts on the view cut or display multiple view cuts at the same time When you display the portion of the model on the cutting plane itself Abaqus CAE displays a cap that shows the intersection of the model and the view cut Figure 4 3 shows the cap displayed on a view cut that displays the interior of a turbocharger model You can customize the appearance of this cap using the Cap Color options which enable you to select either of two cap coloring styles e Select
180. ot of the combined contents in a single viewport e You can click the new Switch Between Overlay and Single Plot State 3 tool in the Visualization toolbox to switch between the single plot and overlay plot state at any time e You can now adjust the animation controls or field output variable options applied to each layer in an overlay plot e You can synchronize the visible layer controls by clicking any of the new syne icons under Layer Options in the Overlay Plot Layer Manager To open more than one output database and generate an overlay plot use the Append to layers option in the Open Database dialog box This feature is shown in Figure 2 2 An overlay plot is automatically created in the viewport and each output database is assigned to a separate layer x Directory E multiple odbs BA A Acl E 0D Lug old odb 0 PullHinge old odb Oo PullHinge odb Eile Name Lug odb PullHinge odb IV Append to layers OK File Filter Output Database odb I Read only Cancel Figure 2 2 Opening multiple output database files into an overlay plot viewport Abaqus CAE Usage All modules File Open File Filter Output Database odb Append to layers Visualization module View Overlay Plot Animation layer Field output layer Synch View Manipulations Synch Plot State Synch Plot Options Synch Field Output GENERAL ENHANCEMENTS References Abaqus CAE User s Manual e Openi
181. ou to display a smaller random sampling of symbol plot arrows These enhancements improve the usability and effectiveness of symbol plots Description You can now display arrows in a symbol plot with a custom uniform color or with different colors that depend on the value of the variable at that location For vector symbols a uniform color selection determines the color for all arrows in the plot for tensor symbols separate color options are available for 13 5 OUTPUT AND VISUALIZATION coloring each of the three principal components Figure 13 3 shows a symbol plot displayed with its tensor arrows colored to reflect variable value V Resultant Symbol Plot Options Color amp Style Limits Labels Vector Quantity Resultant Tenor color C Uniform Spectrum Uniform Color mj Figure 13 3 Symbol plot with tensor arrows in variable colors You can also display a smaller subset of the arrows in a symbol plot if you want to clarify a plot with many arrows The Symbol Plot Options now include a Symbol density slider for vector and tensor symbols that enables you to increase or decrease the number of vector and tensor arrows displayed in the plot Abaqus CAE Usage Visualization module Options Symbol Color amp Style Vector or Tensor tabbed page Color options and Symbol density slider Reference Abaqus CAE User s Manual e Customizing symbol plot arrows Section 43 4 1 in the online HTML vers
182. pled acoustic structural analysis Section 6 10 1 Abaqus Keywords Reference Manual e FREQUENCY e STEADY STATE DYNAMICS 6 14 Enhancements to steady state dynamics user interface Product Abaqus Standard Benefits You can specify the frequency points in steady state dynamic analyses by clustering them around each eigenfrequency Description The spread type of frequency interval allows you to define frequency points in intervals around each eigenfrequency in the frequency range For each of the intervals the equally spaced frequencies at which results are calculated are determined using the user defined number of points The spread type of frequency interval is supported in mode based subspace based and direct solution steady state dynamic analyses References Abaqus Analysis User s Manual e Direct solution steady state dynamic analysis Section 6 3 4 e Mode based steady state dynamic analysis Section 6 3 8 e Subspace based steady state dynamic analysis Section 6 3 9 ANALYSIS PROCEDURES Abaqus Keywords Reference Manual e STEADY STATE DYNAMICS 6 15 Direct cyclic analysis in Abaqus CAE Products Abaqus Standard Abaqus CAE Benefits You can now define direct cyclic and low cycle fatigue analysis procedures as well as solution control parameters to be used in direct cyclic analyses in Abaqus CAE These enhancements increase the coverage of Abaqus analysis product functionality Description Abaqu
183. postprocessing Figure 13 2 shows a sample contour plot with two view cuts active along the X and Y axes Abaqus CAE Usage Visualization module Tools View Cut Manager Allow for multiple cuts Reference Abaqus CAE User s Manual e Displaying a cut section and its free body cut Section 77 2 2 in the online HTML version of this manual 13 6 Interpolated values on cut surfaces for symbol plots Product Abaqus CAE Benefits When you cut through a symbol plot displaying vector symbols of a nodal output variable Abaqus CAE now interpolates values on the cutting surface from nearby nodes and displays arrows that arise from the cutting surface This enhancement provides a more accurate representation of vector values on the cutting surface Description Abaqus CAE now displays interpolated values for the selected nodal output variable on the cutting surface when you cut through a symbol plot These plots previously displayed the values arising from the closest nodes below the cut 13 4 OUTPUT AND VISUALIZATION 0 139999 Position 0 00177206 Sensitivity 1 3 0 139999 Figure 13 2 Contour plot with two active view cuts Reference Abaqus CAE User s Manual e Understanding symbol plotting Section 43 1 13 7 Improved control over arrow color and display in symbol plots Product Abaqus CAE Benefits Abaqus CAE now provides greater control over arrow color in symbol plots and enables y
184. processing programs for Abaqus and creates user defined libraries of Abaqus Standard and Abaqus Explicit user subroutines abaqus restartjoin appends an output database file produced by a restart analysis of a model to the output database produced by the original analysis of that model abaqus odbcombine combines the results data in two or more Abaqus output database files into a single output database file abaqus odbreport creates organized reports of output database information in text HTML or CSV file formats abaqus python accesses the Python interpreter abaqus resume resumes an Abaqus analysis job abaqus script initiates a Python scripting session abaqus substructurecombine combines the model and results data produced by two of a model s substructures into a single output database file a INTRODUCTION TO Abaqus 6 10 abaqus suspend suspends an Abaqus analysis job abaqus upgrade upgrades an input file or output database file from previous versions of Abaqus to the current version Changes to documentation The PDF version of all Abaqus manuals except the Abaqus Scripting Reference Manual and the Abaqus GUI Toolkit Reference Manual includes a print option that offers the ability to print an entire section of the manual without specifying a page range This feature was previously available only in the Abaqus Example Problems Manual The HTML documentation appearance has changed The main reading frame is now displayed wit
185. qus Explicit analysis Standard amp Explicit or you are modeling an Abaqus CFD analysis CFD Most of the functionality presented in the Abaqus CAE interface is filtered to display only functionality that is valid for the model type that you selected For example connectors are not valid for an Abaqus CFD analysis therefore connectors do not appear in the Model Tree or Interaction module menus and toolbox when you specify the CFD model type Figure 4 1 shows an example of the filtered functionality for each model type comparing the Model Tree and the Interaction module toolbox The Start Session dialog box also enables you to create a model database of either model type when you first launch your session Once a model database is created you cannot change the model type Abaqus CAE Usage All modules Start Session With Standard Explicit Model or With CFD Model Model Create Model type Standard amp Explicit or CFD References Abaqus CAE User s Manual e Starting Abaqus CAE or Abaqus Viewer Section 2 1 1 e Specifying model attributes Section 9 8 4 in the online HTML version of this manual 4 2 Midsurface modeling Product Abaqus CAE Benefits You can now create a midsurface model of shell elements to replace thin solids The midsurface model may reduce expense and improve results compared to analyzing thin sections modeled with solid elements Description The midsurface model is a shell model that you crea
186. qus input file both with the same name as the selected STL file but you can specify a different name for these files You can also change the tolerance value within which nodes are merged during the translation process In practice you might want to add the STL model data that you import to an existing Abaqus CAE model To add the STL parts or part instances to an existing Abaqus CAE model after import copy these objects from the newly created model to any other Abaqus CAE model using the Copy Objects dialog box For more information about copying model objects see Copying objects between models Section 9 8 3 of the Abaqus CAE User s Manual in the online HTML version of this manual The STL Export plug in enables you to export data from a part or assembly from the Abaqus CAE model displayed in the current viewport to a file in STL format You can export either geometry data or mesh data and you can create an STL file in either ASCII or binary format Abaqus CAE Usage All modules Plug ins Tools STL Import Plug ins Tools STL Export References Abaqus CAE User s Manual e Importing a model from a file in stereolithography STL format Section 79 10 in the online HTML version of this manual e Exporting a part or assembly in stereolithography STL format Section 79 11 in the online HTML version of this manual 5 6 NX associative import Product Abaqus CAE Benefits You can now use an associative
187. rature specified as a predefined field Description Both geostatic and coupled pore fluid diffusion stress analysis can now model heat transfer fully coupled with pore fluid flow and mechanical deformations when either is used with a domain that consists of the new coupled temperature pore pressure elements The new coupled temperature pore pressure elements are similar to the existing family of pore pressure elements with the important difference that they have temperature as a nodal degree of freedom in addition to pore pressure and displacement The fully coupled approach is important in situations where there is a strong coupling between pore fluid flow and heat transfer and the temperature field has a relatively strong dependence on the stresses and the pore pressure For example changes in the pore pressure may affect the flow rates which in turn may affect the temperature distribution due to the modified convection rates These procedures can still be used in a pure consolidation analysis without heat transfer effects either by using pore pressure displacement elements or by turning off the temperature degrees of freedom for the new fully coupled elements References Abaqus Analysis User s Manual e Three dimensional solid element library Section 25 1 4 e Axisymmetric solid element library Section 25 1 6 6 23 5 ANALYSIS PROCEDURES Abaqus Keywords Reference Manual CONDUCTIVITY DENSITY EXPANSION GEOSTATIC
188. reate Category Other Types for Selected Step Eulerian mesh motion References Abaqus Analysis User s Manual e Eulerian analysis Section 13 1 1 e Eulerian mesh motion Section 13 1 3 9 1 Ej PRESCRIBED CONDITIONS Figure 9 1 Eulerian mesh motion resizes the mesh according to the position of the Lagrangian bottle surface Abaqus CAE User s Manual e Defining an Eulerian mesh motion boundary condition Section 16 10 17 in the online HTML version of this manual e Eulerian mesh motion Section 27 6 Abaqus Keywords Reference Manual e EULERIAN MESH MOTION 9 2 Eulerian boundary conditions in Abaqus CAE Product Abaqus CAE Benefits Several options for controlling the material flux at the boundary of an Eulerian part instance are now available in Abaqus CAE These options offer improved control of Eulerian materials compared to traditional Lagrangian boundary conditions Description Eulerian boundary conditions allow you to control the inflow or outflow of Eulerian material at the boundary of an Eulerian region These boundary conditions can now be defined in the Load module of Abaqus CAE The following inflow conditions are supported e Free inflow e No inflow e Void inflow PRESCRIBED CONDITIONS The following outflow conditions are supported e Free outflow e Nonreflecting outflow e Eq
189. rences Abaqus CAE User s Manual e Structured meshing and mapped meshing Section 17 8 e Swept meshing of three dimensional solids Section 17 9 3 e Free meshing with quadrilateral and quadrilateral dominated elements Section 17 10 2 e Setting the mesh algorithm Section 17 17 5 in the online HTML version of this manual 12 2 Mesh verification queries and saved sets Product Abaqus CAE Benefits Mesh verification now allows you to highlight mesh errors and warnings separately A new mesh query highlights any unmeshed model regions You can save sets containing the highlighted viewport results and you can use the highlighted results to modify the current display group Description When you verify a mesh you can now toggle the Errors and Warnings on the Analysis Checks tab to display their results separately This new capability was added to support another new feature the ability to create sets containing highlighted items from the viewport Figure 12 1 shows the controls to toggle errors and warnings and to create sets containing the highlighted elements or the edges faces or cells geometry related to the highlighted elements 12 2 MESHING ma verity mesh xi Shape Size Analysis Metrics Metrics Checks Color Key I Errors iL sal IV Warnings a IV Create set PoorElements 1 containing elements Highlight Reselect Defaults Dismiss Figure 12 1 Analysis checks
190. ring general analysis procedures Section 14 11 1 in the online HTML version of this manual Abaqus Keywords Reference Manual e DYNAMIC e STEP ANALYSIS PROCEDURES 6 6 Contour integral evaluation improvements Products Abaqus Standard Abaqus CAE Benefits You can perform contour integral evaluation for an arbitrary stationary surface crack without conforming the mesh to the cracked geometry using the extended finite element method XFEM Description Abaqus offers two different ways to evaluate the contour integral The first is based on the conventional finite element method It typically requires the user to conform the mesh to the cracked geometry to explicitly define the crack front and to specify the virtual crack extension direction Detailed focused meshes are generally involved Such an approach is quite cumbersome to obtain accurate contour integral results for a three dimensional curved surface crack The extended finite element method XFEM alleviates these shortcomings XFEM does not require the mesh to match the cracked geometry The presence of a crack is ensured by the special enriched functions in conjunction with additional degrees of freedom Such an approach also removes the requirements of explicitly defining the crack front and specifying the virtual crack extension direction when evaluating the contour integral Abaqus CAE Usage Step module History output request editor Domain Crack crack name References
191. rmulation has been extended to elements with one dimensional stress states in Abaqus Standard Steady state transport analysis is also now supported for one dimensional and plane stress elements Description When time domain viscoelasticity is specified as part of a hyperelastic material definition Abaqus provides a new formulation in which the hereditary integral is written using the standard push forward operator that is applicable for rubberlike solids Viscoelastic dissipation computations have also been improved to produce more accurate results The response in cyclic simple shear for the new formulation is shown in Figure 7 1 where the response of the new formulation is compared with that of the old formulation Under larger strains the new formulation gives physically more reasonable results than the old formulation The new formulation is not used for hyperfoam materials References Abaqus Analysis User s Manual e Time domain viscoelasticity Section 19 7 1 Abaqus Keywords Reference Manual e HYPERELASTIC e STEADY STATE TRANSPORT e VISCOELASTIC Abaqus Verification Manual e Viscoelastic materials Section 2 2 2 7 6 MATERIALS 1 31 Old formulation New formulation Shear stress 0 5 0 0 0 5 Displacement in shear Figure 7 1 Viscoelastic response in cyclic simple shear Abaqus Theory Manual e Finite strain viscoelasticity Section 4 8 2 7 7 Finite strain viscoelas
192. roblems Abaqus CAE Usage Property module Material editor Thermal Specific Heat Type Constant Volume or Constant Pressure References Abaqus Analysis User s Manual e Specific heat Section 23 2 3 Abaqus CAE User s Manual e Defining specific heat Section 12 10 6 in the online HTML version of this manual 7 16 ELEMENTS 8 Elements This chapter discusses elements available in Abaqus It provides an overview of the following enhancements e Support for cylindrical elements in Abaqus CAE Section 8 1 e Coupled temperature pore pressure elements in Abaqus Standard Section 8 2 e Linear pipe elements in Abaqus Explicit Section 8 3 e Fluid elements in Abaqus CFD Section 8 4 8 1 Support for cylindrical elements in Abaqus CAE Product Abaqus CAE Benefits You can now assign element types from the cylindrical solid family of elements to a solid region of your model in Abaqus CAE This enhancement provides improved interactive meshing for cylindrical geometry in an analysis Description The Element Type dialog box in the Mesh module now enables you to assign element types from the cylindrical solid family of elements to solid topologies in your model Figure 8 1 shows a sample model in which one half of a cylindrical threaded assembly has been meshed with CCL12 elements The cylindrical solid family of elements includes element types CCL9 CCL9H CCL12 CCL12H CCL18 CCL18H CCL
193. roducts Abaqus Standard Abaqus Explicit Abaqus CAE Benefits You can now define Johnson Cook strain rate dependence for the isotropic hardening metal plasticity and extended Drucker Prager plasticity models Description In previous releases of Abaqus Standard neither Johnson Cook hardening nor Johnson Cook strain rate dependence was available In addition in previous releases of Abaqus Explicit the Johnson Cook strain rate dependence model was available only in conjunction with the Johnson Cook hardening model In both Abaqus Standard and Abaqus Explicit Johnson Cook rate dependence can now be used in conjunction with the isotropic hardening metal plasticity and extended Drucker Prager plasticity models Abaqus CAE Usage Property module Material editor Suboptions Rate Dependent Hardening Johnson Cook References Abaqus Analysis User s Manual e Rate dependent yield Section 20 2 3 e Inelastic behavior Section 20 1 1 e Extended Drucker Prager models Section 20 3 1 7 13 MATERIALS Abaqus CAE User s Manual e Defining rate dependent yield with yield stress ratios in Defining plasticity Section 12 9 2 in the online HTML version of this manual Abaqus Keywords Reference Manual e RATE DEPENDENT 7 14 Tension cutoff Products Abaqus Standard Abaqus Explicit Abaqus CAE Benefits You can now limit the load carrying capacity in tension when the Mohr Coulomb criterion is used in Abaqus This is u
194. roperty module Material editor Mechanical Damage for Traction Separation Laws select damage initiation criterion Suboptions Damage Stabilization Cohesive specify viscosity coefficient Interaction module Crack editor Allow crack growth and Enrichment radius Specify References Abaqus CAE User s Manual e Damage stabilization in Defining damage Section 12 9 3 in the online HTML version of this manual e Creating an XFEM crack Section 30 3 4 in the online HTML version of this manual 4 12 MODELING 4 14 Ability to select attachment points for additional modeling tasks Product Abaqus CAE Benefits You can now use attachment points for a wide range of modeling activities such as the creation of connectors point or node based couplings point masses or loads This enhancement provides greater flexibility for many common modeling tasks that previously relied on reference points for their definition you can create multiple attachment points on a part but only a single reference point The use of attachment points also improves performance when a number of attachment points are created as a single feature Description You can now pick an attachment point from the viewport for a greater variety of modeling activities Abaqus CAE now supports the selection of attachment points in any component for which reference points are an eligible selection These component include the use of attachment points in any
195. s Supported keywords also indicate the module or other area of the user interface within which you can access them Changes to Abaqus product offerings 1 3 Abaqus CFD is available for the first time in the Abaqus 6 10 release Enhancements to the Abaqus environment file The new order_parallel environment file variable controls whether the ordering procedure for the direct sparse solver runs in parallel on compute clusters For more information see Parallel ordering for the direct sparse solver Section 3 1 INTRODUCTION TO Abaqus 6 10 The double_precision environment file variable now provides additional controls for using the double precision constraint solver For more information see Double precision constraint solving within a single precision Abaqus Explicit execution Section 3 4 1 4 Changes in interpretation of input data The following changes in Abaqus 6 10 may impact the analysis of input files from previous releases of Abaqus The domain decomposition iterative solver has been replaced by a new iterative solver As a result the SOLVER DDM setting is no longer available for the STEP option use SOLVER ITERATIVE instead For more information see Iterative equation solver Section 6 4 For general procedures using the iterative solver the default tolerance for convergence of the relative residual of the linear system has changed from 10 to 10 the default tolerance is still 10 for linear pert
196. s CAE now provides support for direct cyclic and low cycle fatigue analysis procedures in the Step module as shown in Figure 6 5 x Name Step 1 Type Direct cyclic Basic Incrementation Fatigue Other Type Automatic Fixed Maximum number of increments 100 Initial Minimum Maximum Increment size 1 l 1E 005 1 Maximum number of iterations 200 Initial Maximum Increment Number of Fourier terms 11 es s IV Max allowable temperature change per increment sis Tl Creep swelling viscoelastic strain error tolerance E J Evaluate structure response at time points o Create OK Cancel Figure 6 5 Specifying incrementation options for a direct cyclic step A direct cyclic procedure is a quasi static analysis that uses a combination of Fourier series and time integration of the nonlinear material behavior to obtain the stabilized cyclic response of the structure iteratively The basis of this method is to construct a displacement function u t that describes the response 6 17 ANALYSIS PROCEDURES of the structure at all times during a load cycle with period T A direct cyclic procedure avoids the considerable numerical expense associated with a transient analysis In addition you can specify general solution controls for direct cyclic procedures and restart an analysis from a previous direct cyclic analysis in Abaqus CAE Abaqus CAE Usage Step module Create Step General Direct cy
197. s CAE session This connection can be used to transfer model data and to propagate design changes between NX and Abaqus CAE The NX Associative Interface can be purchased and downloaded from Elysium Inc www elysiuminc com Geometry Translator for CATIA V4 This add on capability allows the user to import the geometry of CATIA V4 format parts and CATIA V4 assemblies model catdata and exp files directly into Abaqus CAE Geometry Translator for I DEAS This translator plug in for I DEAS generates a geometry file using the Elysium Neutral File en or Elysium Neutral Assembly File ea format which can be imported into Abaqus CAE Geometry Translator for Parasolid This add on capability allows the user to import the geometry of Parasolid format parts and Parasolid assemblies x_t x_b and xmt files directly into Abaqus CAE Translator utilities Abaqus translators are provided with the release They are invoked through the Abaqus execution procedure the driver The translators and the commands to invoke them are described below INTRODUCTION TO Abaqus 6 10 abaqus fromansys translates an ANSYS input file to an Abaqus input file abaqus fromnastran translates a Nastran bulk data file to an Abaqus input file abaqus frompamcrash translates a PAM CRASH input file to a partial Abaqus input file abaqus fromradioss translates a RADIOSS input file to a partial Abaqus input file abaqus tonastran translates an Abaqus i
198. s Explicit Utility routines to obtain parallel processes information Abaqus CFD Section 4 4 Modeling enhancements for Abaqus CFD Section 6 1 Abaqus CFD analysis Section 6 2 Incompressible fluid dynamics Section 6 3 Section 7 16 Section 8 4 Section 13 8 Abaqus CFD to Abaqus Standard or to Abaqus Explicit co simulation Specifying a constant pressure specific heat in Abaqus CFD Fluid elements in Abaqus CFD Combining data from multiple output databases Abaqus CAE Section 2 5 Performance improvements in Abaqus CAE Section 2 6 Usability enhancements in Abaqus CAE Section 2 7 Using wildcard characters for file selection Section 2 8 Enhancements to overlay plots PRODUCT INDEX Section 2 9 Section 2 10 Section 3 4 Section 3 6 Section 4 1 Section 4 2 Section 4 3 Section 4 4 Section 4 5 Section 4 6 Section 4 7 Section 4 8 Section 4 9 Section 4 10 Section 4 11 Section 4 12 Section 4 13 Section 4 14 Section 4 15 Section 4 17 Section 4 18 Section 4 19 Section 4 20 Section 4 21 Section 4 22 Section 4 23 Section 4 24 Section 4 25 Section 4 26 Section 5 1 Section 5 2 Section 5 3 Section 5 4 Section 5 5 Section 5 6 Section 6 1 Section 6 2 Section 6 3 Linking field output across viewports Accessing plot display customization options from the Visualization module toolbox Double precision constraint solving within a single precision Abaqus Explicit execution Dynamic load balancing for domain level paralle
199. seful in geotechnical applications for failure and strength predictions when material has limited strength in tension Description Abaqus now gives you the option to include tension cutoff along with Mohr Coulomb plasticity when modeling geological materials Tension cutoff is modeled using the Rankine surface and you can provide either hardening or softening of the failure surface in tension A smooth non associative flow potential that closely follows the Rankine surface is used to model plastic flow on the tensile failure surface Abaqus CAE Usage Property module Material editor Mechanical Plasticity Mohr Coulomb Plasticity Specify tension cutoff References Abaqus Analysis User s Manual e Mohr Coulomb plasticity Section 20 3 3 Abaqus CAE User s Manual e Defining Mohr Coulomb plasticity in Defining plasticity Section 12 9 2 in the online HTML version of this manual Abaqus Keywords Reference Manual e MOHR COULOMB e MOHR COULOMB HARDENING e TENSION CUTOFF Abaqus Example Problems Manual e Jointed rock slope stability Section 1 1 6 7 14 MATERIALS Abaqus Verification Manual e Rate independent plasticity Section 2 2 9 Abaqus Theory Manual e Mohr Coulomb model Section 4 4 5 7 15 Ignition and growth equation of state Products Abaqus Explicit Abaqus CAE Benefits The ignition and growth equation of state is now available in Abaqus Explicit It can be used to
200. ser subroutine UINTER Section 14 1 e Define fluid exchange via user subroutines VUFLUIDEXCHEFFAREA and VUFLUIDEXCH Section 14 2 e Utility routines to obtain principal stress strain values and directions in Abaqus Explicit Section 14 3 e Utility routines to obtain parallel processes information Section 14 4 e New location option for saving plug ins created with the Really Simple GUI RSG Dialog Builder Section 14 5 e Utility routine to obtain the volume fraction in Eulerian elements Section 14 6 14 1 Define viscous and structural matrices via user subroutine UINTER Product Abaqus Standard Benefits You can now define viscous and structural damping matrices for user subroutine UINTER in direct steady state dynamic analysis Description User subroutine UINTER accepts viscous and damping matrices arguments that allow you to define the material level damping matrices Any viscous and structural damping effects at the element interfaces representing local dissipation behavior e g due to friction can now be implemented together with the stiffness matrix for direct steady state dynamic analysis References Abaqus Keywords Reference Manual e SURFACE INTERACTION Abaqus User Subroutines Reference Manual e UINTER Section 1 1 34 14 2 Define fluid exchange via user subroutines VUFLUIDEXCHEFFAREA and VUFLUIDEXCH Product Abaqus Explicit USER SUBROUTINES UTILITIES AND PLUG INS Ben
201. sim co il Lainate MI Tel 39 02 39211211 simulia ity info 3ds com Tokyo Tel 81 3 5442 6300 simulia tokyo support 3ds com Osaka Tel 81 6 4803 5020 simulia osaka support 3ds com Yokohama shi Kanagawa Tel 81 45 470 9381 isight jp info 3ds com Mapo Gu Seoul Tel 82 2 785 6707 8 simulia kr info 3ds com Puerto Madero Buenos Aires Tel 54 11 4312 8700 Horacio Burbridge 3ds com WorleyParsons Advanced Analysis Kuala Lumpur Tel 603 2039 9000 abaqus my worleyparsons com Matrix Applied Computing Ltd Auckland Tel 64 9 623 1223 abaqus tech matrix co nz BudSoft Sp z 0 0 Poznan Tel 48 61 8508 466 info budsoft com pl TESIS Ltd Moscow Tel 7 495 612 44 22 info tesis com ru Vasteras Sweden Tel 46 21 150870 simulia nordic info 3ds com WorleyParsons Advanced Analysis Singapore Tel 65 6735 8444 abaqus sg worleyparsons com Finite Element Analysis Services Pty Ltd Parklands Tel 27 21 556 6462 feas feas co za Principia Ingenieros Consultores S A Madrid Tel 34 91 209 1482 simulia principia es Simutech Solution Corporation Taipei R O C Tel 886 2 2507 9550 lucille simutech com tw WorleyParsons Advanced Analysis Singapore Tel 65 6735 8444 abaqus sg worleyparsons com A Ztech Ltd Istanbul Tel 90 216 361 8850 info a ztech com tr Warrington Tel 44 1 925 830900 simulia uk info 3ds com Sevenoaks Tel 44 1 732 834930 simulia uk info 3ds com Complete contact information is avail
202. ssociative import 5 6 6 Analysis procedures Abaqus CFD analysis 6 1 Incompressible fluid dynamics 6 2 Abaqus CFD to Abaqus Standard or to Abaqus Explicit co simulation 6 3 Iterative equation solver 6 4 Dynamics enhancements 6 5 Contour integral evaluation improvements 6 6 Continued development of the XFEM based crack propagation capability 6 7 Enhancements in Abaqus Standard to Abaqus Explicit co simulation 6 8 Global damping and damping controls in matrix and substructure generation procedures 6 9 Damping controls in substructure property definition 6 10 Improved integration scheme in random response analysis 6 11 Use of arbitrary dynamic modes for substructure generation 6 12 Enhancements to coupled structural acoustic analysis 6 13 Enhancements to steady state dynamics user interface 6 14 Direct cyclic analysis in Abaqus CAE 6 15 CONTENTS AMS eigensolver performance improvements 6 16 Random response analysis based on the SIM architecture 6 17 Submodeling based on the driven nodes only found lying within the global model 6 18 Enhancements to the geostatic procedure 6 19 Enhancements to complex eigenvalue extraction analysis 6 20 Enhancement to the geostatic and soils consolidation capabilities to model coupled heat transfer 6 21 7 Materials Mohr Coulomb plasticity in Abaqus Explicit 7 1 Critical state clay plasticity model in Abaqus Explicit TD Cast iron plasticity in Abaqus Explicit 7 3 Viscoelasticity with anisotropic elastic
203. static response Large time increments are taken when possible to minimize computational cost and considerable numerical dissipation may be used to obtain convergence during certain stages of the loading history Inertia effects are inherently stabilizing Some models that have difficulty converging in a static analysis will behave better in a dynamic procedure For example unconstrained rigid body modes or zero energy modes are problematic in a static analysis they cause the stiffness matrix to be singular but inertia tends to regularize the system of equations considered by Newton iterations for a dynamic analysis Using the general direct integration dynamic procedure can be beneficial to solution robustness even for cases in which the final static response is of primary interest In addition to specifying the application type you can set several new controls and options in a dynamic procedure to tune the time integration scheme Most of the new controls for direct integration dynamic procedures are supported in Abaqus CAE including the specification of the application type Because the application type impacts many other incrementation and integration settings options to use the analysis product or application default have been added to many of the settings in the dynamic implicit Edit Step dialog box to simplify the possible combinations of options see Figure 6 2 Figure 6 3 and Figure 6 4 Abaqus CAE Usage Step module Crea
204. t co simulation Section 6 3 You use Abaqus CAE to create the fluid model see Model types in Abaqus CAE Section 4 1 and generate the input file You can execute Abaqus CFD jobs in Abaqus CAE or from the command line The Abaqus Analysis User s Manual is the reference guide for Abaqus CFD Abaqus CFD appears in the Products list at the beginning of each manual section if the information in that section applies to Abaqus CFD If the section is also applicable to Abaqus Standard or Abaqus Explicit the individual product names are used in the discussion to indicate when information applies to a specific product Abaqus CAE Usage All modules Model Create Model type CFD References Abaqus Analysis User s Manual e Abaqus Standard Abaqus Explicit and Abaqus CFD execution Section 3 2 2 e Parallel execution in Abaqus CFD Section 3 5 4 e Fluid dynamic analysis Section 6 6 Abaqus CAE User s Manual e Understanding analysis jobs Section 18 2 e Chapter 29 Fluid dynamic analyses 6 2 Incompressible fluid dynamics Products Abaqus CFD Abaqus CAE Benefits You can solve laminar and turbulent thermal convective and deforming mesh ALE incompressible fluid dynamics problems using Abaqus CFD Description You can use Abaqus CFD to solve the following types of incompressible flow problems e Internal or external flows that are steady state or transient span a broad Reynolds number range a
205. t instance onto selected geometry such as a face or an edge of an unassociated part instance using the Project tool Abaqus CAE moves or projects the nodes of the original meshed part and your modifications appear on all dependent instances of the part For example you can move the nodes of a part instance until they are close enough to be within the node merging tolerance Abaqus CAE Usage Mesh module Mesh Edit References Abaqus CAE User s Manual e What can I do with the Edit Mesh toolset Section 62 1 e Editing the position of selected nodes Section 62 5 2 in the online HTML version of this manual e Projecting nodes Section 62 5 3 in the online HTML version of this manual 12 11 Selecting by feature edge Product Abaqus CAE Benefits You can now select all of the nodes or elements along connected edges of an orphan mesh part which simplifies the procedure for selecting multiple objects in the viewport Description A new selection method has been introduced that allows you to select the nodes or elements along connected edges of an orphan mesh part Abaqus CAE starts from a selected edge and selects all nodes or elements along connected edges until it encounters an edge that branches off at an angle that exceeds the specified angle Alternatively you can select the intersection of multiple edges and Abaqus CAE selects the nodes or elements along all the edges that meet at the intersection Figure
206. tandard 6 9 EF References Abaqus Analysis User s Manual e Numerical controls for general contact in Abaqus Standard Section 32 2 6 e Adjusting contact controls in Abaqus Standard Section 32 3 6 Abaqus Keywords Reference Manual e CONTACT FORMULATION e CONTACT PAIR 11 14 INTERACTIONS 11 14 Beam contact thickness in Abaqus Explicit Product Abaqus Explicit Benefits Contact thickness calculations for beams in the general contact algorithm in Abaqus Explicit have been improved Description Beams are modeled as circular cylinders in the general contact algorithm The radius of the cylinder representing the beam is set equal to the radius of a circle circumscribed around the beam cross section Reference Abaqus Analysis User s Manual e Defining general contact interactions in Abaqus Explicit Section 32 4 1 11 15 Progressive viewfactor calculation Products Abaqus Standard Abaqus CAE Benefits The accuracy of the viewfactor calculation for cavity radiation analyses has been improved Description A progressive viewfactor integration scheme has been introduced that provides more accurate results in cavity radiation analyses The new scheme identifies regions where different levels of approximations can be used to provide the right balance of efficiency and accuracy when facets are sufficiently far from each other a fast lumped area approximation is used If the facets are close to each other
207. te Step General Dynamic Implicit Basic Application Transient fidelity Moderate dissipation Quasi static or Analysis product default Incrementation Maximum increment size Analysis application default Incrementation Half increment Residual Analysis product default or Specify scale factor Other Extrapolation of previous state at start of each increment Analysis product default or Velocity parabolic Other Alpha Analysis product default Other Initial acceleration calculations at beginning of step Analysis product default S ANALYSIS PROCEDURES W Edit Step xi Name Step 1 Type Dynamic Implicit Basic l Incrementation Other Description Direct integration dynamic procedure Time period fi Mai C off This setting controls the inclusion of nonlinear effects geom on of large displacements and affects subsequent steps Application Analysis product default w I Include adiabatic heating effects Figure 6 2 Basic tab of the dynamic implicit Edit Step dialog box fm edit Ste Name Step 1 Type Dynamic Implicit Basic Incrementation Other Type Automatic Fixed Maximum number of increments 100 Initial Minimum Increment size 1 1E 005 Analysis application default Specify Maximum increment size M Half increment Residual I Suppress calculation Note May be automatically suppressed when application is not set to transient fidelity Analysis product
208. te to represent the solid model Starting from the solid model you select solid cells that you would like to replace with a midsurface model Abaqus CAE creates a reference representation to replace the solid geometry You can use the reference representation to help create the shell faces for the midsurface model You can use the shell feature tools and the tools in the Geometry Edit toolset to create the shell faces The new Assign Thickness and Offset tool allows you to define the thicknesses on shell geometry You can then choose whether Abaqus uses shell thicknesses from the geometry or from the section assignment to display and analyze the model 4 2 gt Abaqus CAE 6 10 iewport 1 E Eile Model viewport view Interaction Constraint Connector Special Feature a phone Hep n MODELING 0 x BEZE Model Resuts amp Model Database 1 Ag Models 2 E CFD Model E Std Xpl Model i fl Parts 2 Part 1 oh Features 1 amp Sets bp Surfaces Skins 6 Stringers t Section Assignments fhe Orientations E composite Layups aig Engineering Features Ba Mesh Empty Part 2 Ee Materials E gt Sections Profiles 4 Assembly oft Steps 1 Ba Field Output Requests Fe History Output Requests He Time Points Ga ALE Adaptive Mesh Constraint x Dehetre aQRinike Aa Assembly defaults Module interaction x Model fata xpl Model EF Step x E E lt ri E
209. temperature pore pressure element axisymmetric quadrilateral bilinear displacement bilinear pore pressure bilinear temperature reduced integration new S CAX4RPHT Coupled temperature pore pressure element axisymmetric quadrilateral bilinear displacement bilinear pore pressure bilinear temperature hybrid constant pressure reduced integration new S C3D8PHT Coupled temperature pore pressure element 8 node brick trilinear displacement trilinear pore pressure trilinear temperature hybrid constant pressure new S C3D8PT Coupled temperature pore pressure element 8 node brick trilinear displacement trilinear pore pressure trilinear temperature SUMMARY OF CHANGES new S C3D8RPHT Coupled temperature pore pressure element 8 node brick trilinear displacement trilinear pore pressure trilinear temperature reduced integration hybrid constant pressure new S C3D8RPT Coupled temperature pore pressure element 8 node brick trilinear displacement trilinear pore pressure trilinear temperature reduced integration new S C3D10MPT Coupled temperature pore pressure element 10 node modified displacement and pore pressure tetrahedron hybrid linear pressure hourglass control new C FC3D4 Fluid element 4 node tetrahedron new C FC3D8 Fluid element 8 node brick new E PIPE21 2 node linear pipe in a plane new E PIPE31 2 node linear pipe in space 16 2 Changes in Abaqus optio
210. teraction in an Abaqus Standard analysis The bodies forming the joint may both be deformable as would be the case with 11 3 INTERACTIONS threaded connectors or one may be rigid as would occur when a soft gasket is used as a seal between stiffer structures You specify the points on the master and slave surfaces exposed to the fluid pressure the magnitude of the fluid pressure and the critical contact pressure to define pressure penetrations Abaqus CAE Usage Interaction module Interaction Create Pressure penetration References Abaqus Analysis User s Manual e Pressure penetration loading Section 33 1 7 Abaqus CAE User s Manual e Defining pressure penetration Section 15 13 13 in the online HTML version of this manual 11 3 General contact performance Product Abaqus Standard Benefits The performance for general contact in Abaqus Standard has been improved Description The highly automated nature of general contact in Abaqus Standard can significantly reduce model set up time but usually causes some lag in analysis run time compared with a traditional contact pair approach Efficiency improvements in batch preprocessing and within Newton iterations have narrowed the performance gap Contact pairs using the finite sliding surface to surface contact formulation also benefit from some of the improvements Reference Abaqus Analysis User s Manual e Defining general contact interactions in
211. the HTML documentation e Searchable alternative to the HTML documentation particularly for situations where the HTML documentation is not searchable because it was installed with no web server More information about navigating searching and printing the Abaqus PDF documentation is available in Chapter 5 Overview of the Abaqus PDF documentation of the Using Abaqus Online Documentation manual Reference Abaqus Installation and Licensing Guide e Documentation installation procedure Section 2 1 1 2 5 Performance improvements in Abaqus CAE Product Abaqus CAE Benefits Abaqus CAE now provides improved performance for connectors and many common modeling and postprocessing activities These enhancements provide a more productive modeling and postprocessing environment especially for very large and complex models Description Several improvements now provide a faster experience for many modeling and postprocessing activities in Abaqus CAE These enhancements include the following performance upgrades e Abaqus CAE provides faster import of input files with a large number of sections and engineering features such as fasteners and couplings Abaqus CAE also provides better performance for working on model databases with large numbers of features surfaces and sets and Abaqus CAE allows you to switch between modules more quickly e The writing of coupled Eulerian Lagrangian analysis input files with large volume fractio
212. ticity in Abaqus Explicit Section 7 11 e Johnson Cook plasticity in Abaqus Standard Section 7 12 e Enhancements to Johnson Cook strain rate dependence Section 7 13 e Tension cutoff Section 7 14 e Ignition and growth equation of state Section 7 15 e Specifying a constant pressure specific heat in Abaqus CFD Section 7 16 7 1 Mohr Coulomb plasticity in Abaqus Explicit Products Abaqus Explicit Abaqus CAE Benefits The Mohr Coulomb criterion which is widely used in geotechnical applications for failure and strength predictions is now available in Abaqus Explicit Description Abaqus Explicit now provides the Mohr Coulomb plasticity model that previously was available only in Abaqus Standard The constitutive model is an extension of the classical Mohr Coulomb failure criterion It is an elastoplastic model that uses a yield function of the Mohr Coulomb form this yield function includes isotropic cohesion hardening softening The model uses a flow potential that has a hyperbolic shape in the meridional stress plane and has no corners in the deviatoric stress space This flow potential is then completely smooth and therefore provides a unique definition of the direction of plastic flow Import between Abaqus Standard and Abaqus Explicit is now supported for the Mohr Coulomb plasticity model MATERIALS Abaqus CAE Usage Property module Material editor Mechanical Plasticity Mohr Coulomb Plastic
213. ticity with Mullins effect Products Abaqus Standard Abaqus Explicit Benefits Combining Mullins effect with finite strain viscoelasticity is useful in predicting mechanical behavior of a class of rubber materials Description Abaqus now makes it possible to combine finite strain time domain viscoelasticity with Mullins effect Mullins effect when used with viscoelasticity is applied to the long term modulus This implies that damage energy may be dissipated in the long term response through Mullins effect All dissipation that occurs from instantaneous to long term response is accounted for by the viscoelastic mechanism References Abaqus Analysis User s Manual e Mullins effect in rubberlike materials Section 19 6 1 e Time domain viscoelasticity Section 19 7 1 7 7 MATERIALS Abaqus Keywords Reference Manual e MULLINS EFFECT e VISCOELASTIC Abaqus Verification Manual e Mullins effect and permanent set Section 2 2 3 Abaqus Theory Manual e Mullins effect Section 4 7 1 e Finite strain viscoelasticity Section 4 8 2 7 8 Field expansion Product Abaqus Standard Benefits Field expansion is similar to thermal expansion except that it is driven by a user specified predefined field variable instead of temperature It can be used to model stresses due to volumetric expansion as a result of for example moisture absorption by a structure Description Abaqus Standard now allows the m
214. tion 33 1 5 e Stiffness method for imposing frictional constraints in Abaqus Standard in Frictional behavior Section 33 1 5 gt Abaqus Keywords Reference Manual e CHANGE FRICTION e FRICTION 11 12 Midface node no longer added for serendipity elements involved in surface to surface contact pairs Product Abaqus Standard Benefits The analysis is now more consistent with the user description of the model Description By default midface nodes are no longer added to underlying elements of surface to surface contact pairs Abaqus Standard continues to add midface nodes to serendipity elements underlying the slave surface of node to surface contact pairs to avoid fundamental problems for 8 node slave faces in the node to surface contact formulation The new default behavior for surface to surface contact pairs is consistent with the preexisting behavior for general contact A user interface is provided to revert to automatically adding midface nodes for serendipity elements underlying the slave surface of surface to surface contact pairs but there is no user control associated with whether midface nodes are added for serendipity elements underlying node to surface contact pairs or general contact References Abaqus Analysis User s Manual e Adjusting contact controls in Abaqus Standard Section 32 3 6 Abaqus Keywords Reference Manual e CONTACT PAIR 11 12 INTERACTIONS 11 13 Controlling smoothn
215. tiple load cases in direct steady state dynamic analysis Previously this output could be requested only when using a single load case Reference Abaqus Analysis User s Manual e Direct solution steady state dynamic analysis Section 6 3 4 13 4 Isosurface contour type for contour plots Product Abaqus CAE Benefits You can plot the contours of a contour plot using isosurfaces This enhancement extends the functionality of contour plotting especially for visualization of data from Abaqus CFD analyses Description A fourth contour type isosurface is now available for contour plots This option extends line type contours through the body of the model as shown in the example in Figure 13 1 Figure 13 1 Isosurface type contour plot with 16 discrete intervals You can display edges around each isosurface type contour in the plot and customize their color style and thickness 13 3 OUTPUT AND VISUALIZATION Abaqus CAE Usage Visualization module Options Contour Contour Type options Isosurface Reference Abaqus CAE User s Manual e Choosing line banded quilt or isosurface type contours Section 42 4 1 in the online HTML version of this manual 13 5 Allowing for multiple view cuts Product Abaqus CAE Benefits You can now cut through your model using multiple view cuts in the Visualization module Description Abaqus CAE now allows you to display multiple view cuts at the same time during
216. to drag select several coincident points in your model create a connector wire feature on the points and assign a connector section to the feature Figure 11 10 shows the new dialog box with several coincident points selected After you select the coincident points you want to include you can delete any of them from the dialog box or you can swap the first and second points in any coincident point pairing In addition you can change the orientation of the first points and the second points in each coincident point pairing by aligning them with a local coordinate system and by applying additional rotational angles to them Abaqus CAE Usage Interaction module Connector Coincident Builder Reference Abaqus CAE User s Manual e Creating coincident point connectors Section 15 12 9 in the online HTML version of this manual 11 18 INTERACTIONS x M Endpoints Point 2 gZ Part 1 1 Yertex 1 Part 1 2 Vertex 2 Part 1 1 Yertex 0 Part 1 2 Vertex 3 P Part 1 1 Vertex 4 Part 1 2 Vertex 5 Part 1 1 Yertex 6 Part 1 2 Vertex 7 Part 1 1 Yertex 8 Part 1 2 Vertex 9 x M Section Data Section connsect 1 x Create Connection type Beam Show Diagram Orientations csysi Specify CSYS Global Edt eke Create Wo modifications to C515 Additional rotation angles degrees About axis 1 2 3 CcS S 2 Specify CSYS Global Edit a Use orientation 1 C Specif
217. tore many Abaqus files Description You can enter partial names into the File Name field of file selection dialog boxes Use common wildcard search characters such as question marks and asterisks to indicate characters that can be replaced For example if you enter dyn Abaqus CAE lists all files within the current directory containing dyn and ignores all preceding or following characters You can specify lists of characters to be allowed or excluded from the file names and you can specify patterns When you use a wildcard search Abaqus CAE also clears the file extension setting in the File Filter field allowing you to select files with nonstandard file extensions Reference Abaqus CAE User s Manual e Using file selection dialog boxes Section 3 2 10 2 8 Enhancements to overlay plots Product Abaqus CAE Benefits Abaqus CAE now allows you to open multiple output database odb files and produce an automatic overlay plot in a single step Overlay plots are useful for example for displaying data from both GENERAL ENHANCEMENTS output databases in a co simulation in the same viewport This enhancement and others improve the usability of overlay plots for applications such as fluid structure interaction FSI co simulations using Abaqus CFD Description There are several new enhancements to overlay plot functionality e You can open more than one output database at the same time and generate an automatic overlay pl
218. tput of filtered target values for filtered field output is now written to the output database You can filter and monitor an invariant of a vector or tensor quantity Description When using filtering to find the maximum minimum absolute maximum or limiting value of a variable the time at which the value is reached is now also output to the output database By default when using field filtering for vector or tensor output each component is filtered separately You now have the choice to filter and monitor an invariant quantity Abaqus CAE Usage Step module Output Field Output Requests Create Apply filter Tools Filter Create Type Butterworth Type I Chebyshev or Type II Chebyshev Determine bounding value Maximum Minimum or Absolute maximum toggle on Bounding value limit value Invariant First or Second References Abaqus Analysis User s Manual e Output to the output database Section 4 1 3 Abaqus CAE User s Manual e Creating a filter Section 64 3 in the online HTML version of this manual 13 12 OUTPUT AND VISUALIZATION Abaqus Keywords Reference Manual e FILTER 13 14 Enhancements to free body cuts Product Abaqus CAE Benefits Abaqus CAE now includes data from the continuum shells in your model when calculating resultant force and moment for free body cuts displayed on view cuts In addition you can now report free body cut data in the local coordinate system and Abaqus CAE now
219. tude objects can be included in the same X Y plot if they are all of the same amplitude type By default amplitude plots are sized to include all of the data from every amplitude definition included in the plot You can focus in on a subset of the data by specifying a custom minimum or maximum X axis value for plotted data The plug in also enables you to save the selected amplitude plot as an X Y data object that will be included in the output database for the analysis Abaqus CAE Usage Interaction module or Load module Plug ins Tools Amplitude Plotter Reference Abaqus CAE User s Manual e Plotting amplitude data Section 79 12 in the online HTML version of this manual CONSTRAINTS 10 Constraints This chapter discusses kinematic constraints It provides an overview of the following enhancement e Creating a planar constraint Section 10 1 10 1 Creating a planar constraint Product Abaqus CAE Benefits The Plane Remains Plane plug in lets you constrain a planar face on a solid body This tool provides additional techniques for controlling the model region during an analysis Description The Plane Remains Plane plug in lets you constrain a planar face on a solid body using one or more of the following techniques e Create Planar Constraint using an analytical rigid surface a constraint is generated that causes the planar face to remain planar throughout an analysis The plane can rotate and expand
220. ty check after geometry edits Product Abaqus CAE Benefits Abaqus CAE now automatically prompts you to update the validity of part geometry after you perform any repairs or edits that could affect the validity of the part This enhancement helps you to ensure the parts in your model are valid Description When you repair or edit the edges faces or parts in your model using tools in the Geometry Edit toolset the resulting changes can render the geometry in the model invalid Abaqus CAE now helps you ensure valid part geometry in your model more easily by prompting you to update the validity of your geometry after you perform repairs that could create invalid geometry For repair operations that are less likely to impact part validity Abaqus CAE does not display this automatic check Abaqus CAE Usage Part module Tools Geometry Edit Reference Abaqus CAE User s Manual e Chapter 67 The Geometry Edit toolset 4 12 Stitching gaps in non manifold parts Product Abaqus CAE Benefits You can now stitch gaps between free edges in a non manifold part Description The Stitch tool in the Geometry Edit toolset can now be used to stitch gaps between free edges in non manifold parts that is parts in which at least one edge is shared by more than two faces Stitch functionality was previously available only for manifold parts Abaqus CAE Usage Part module Tools Geometry Edit Edge Stitch 4 11 MODELING Reference
221. ual to the number of constant values needed as data to define the fluid exchange in user subroutine VUFLUIDEXCH Set the new DEPVAR parameter equal to the number of solution dependent state variables required for user subroutine VUFLUIDEXCH FRACTURE CRITERION This option can now be used in Abaqus Explicit to define brittle fracture crack propagation using a VCCT criterion in the context of general contact surface based cohesive behavior This option can also be used in Abaqus Standard to specify a linear elastic fracture mechanics based criterion for crack propagation in enriched elements Use the new NORMAL DIRECTION parameter to specify the crack propagation direction for enriched elements Use the new VISCOSITY parameter to specify the viscosity coefficient used in the viscous regularization in Abaqus Standard GAS SPECIFIC HEAT Define reacted product s specific heat for an ignition and growth equation of state GEOSTATIC Use the new HEAT parameter to specify if heat transfer is to be modeled when this procedure is used with the new family of coupled temperature pore pressure elements Use the new UTOL parameter to invoke automatic time incrementation and specify the tolerance for the maximum change of displacements GLOBAL DAMPING This option can now be used with the MATRIX GENERATE and SUBSTRUCTURE GENERATE options 16 8 SUMMARY OF CHANGES mod S E INCIDENT WAVE INTERACTION In steady state dynamic anal
222. uilibrium outflow e Zero pressure outflow Abaqus CAE Usage Load module BC Create Category Other Types for Selected Step Eulerian boundary References Abaqus Analysis User s Manual e Defining Eulerian boundaries Section 13 1 2 Abaqus CAE User s Manual e Defining an Eulerian boundary condition Section 16 10 16 in the online HTML version of this manual e Overview of Eulerian analyses Section 27 1 9 3 Reading nodal output for temperature normalized concentration and electric potential from an output database into predefined field variables Products Abaqus Standard Abaqus Explicit Benefits Support for reading scalar nodal output variables from previous Abaqus analyses into predefined field variables makes it easier for you to sequentially include the effects of multiple fields 1 e multiphysics in Abaqus analyses Description You can now initialize field variables with temperatures NT normalized concentrations NNC and electric potentials EPOT stored as nodal output on an output database from a previous analysis In Abaqus Standard you can also use these output variables to define the time history of field variables during a subsequent analysis This capability enables new sequential work flows For example you could put together a sequential thermal moisture stress analysis by 1 running a heat transfer analysis 2 driving a mass diffusion analysis using temperatures stored from th
223. under a license directly from Microsoft or you may proceed as described in the Installation Instructions for Abaqus Programs without entering into a separate license with Microsoft If you choose to use MS MPI as made available by Dassault Syst mes or its subsidiary use and reproduction of MS MPI by your business governmental or academic entity will be subject to the restrictions as stated in the MS MPI license agreement below see MICROSOFT SOFTWARE LICENSE TERMS and will be terminable by Microsoft under the conditions in that software license agreement MS MPI is NOT an Abaqus Program and is NOT warranted or supported by Dassault Systemes or its subsidiaries Without limiting the foregoing MICROSOFT SOFTWARE LICENSE TERMS MICROSOFT HPC Pack MS MPI Redistributable Pack These license terms are an agreement between Microsoft Corporation or based on where you live one of its affiliates and you Please read them They apply to the software named above which includes the media on which you received it if any The terms also apply to any Microsoft updates supplements Internet based services and support services for this software unless other terms accompany those items If so those terms apply BY USING THE SOFTWARE YOU ACCEPT THESE TERMS IF YOU DO NOT ACCEPT THEM DO NOT USE THE SOFTWARE If you comply with these license terms you have the rights below 1 INSTALLATION AND USE RIGHTS You may install and use any num
224. urbation procedures You can adjust the default tolerance using the SOLVER CONTROLS option In addition you can no longer specify the number of domains used by the iterative solver with the SOLVER CONTROLS option For more information see Iterative equation solver Section 6 4 For implicit dynamic analyses that involve contact Abaqus Standard by default now uses a time integration scheme with more damping than in previous releases To restore the previous time integration scheme use the APPLICATION TRANSIENT FIDELITY setting with the DYNAMIC option For more information see Dynamics enhancements Section 6 5 Abaqus Standard no longer uses the contact patch algorithm to track the association between slave nodes and master surface nodes Therefore the SLIDE DISTANCE parameter on the CONTACT CONTROLS option has no effect on an analysis For steady state dynamic analysis in Abaqus Standard the following loading options have the LOAD CASE parameter replaced by the REAL and IMAGINARY parameters describing the real in phase and imaginary out of phase parts of the loading respectively BASE MOTION BOUNDARY CECHARGE CLOAD CONNECTOR LOAD CONNECTOR MOTION DECHARGE DLOAD DSECHARGE DSLOAD INCIDENT WAVE INTERACTION PRESSURE PENETRATION GENERAL ENHANCEMENTS 2 General enhancements This chapter describes the following general enhancements that have been made to Abaqus e Silent uninstaller batch
225. us Explicit Cast iron plasticity in Abaqus Explicit Section 7 4 Section 7 5 Section 7 6 Section 7 7 Section 7 10 Section 7 11 Section 7 13 Section 7 14 Section 7 15 Section 8 3 Section 9 1 Section 9 3 Section 9 4 Section 11 9 Section 11 14 Section 13 8 Section 13 11 Section 13 12 Section 13 13 Section 14 2 Section 14 3 Section 14 4 PRODUCT INDEX Viscoelasticity with anisotropic elasticity in Abaqus Explicit Transferring results with concrete damaged plasticity Finite strain viscoelasticity Finite strain viscoelasticity with Mullins effect Low density foam materials in Abaqus CAE Combining equations of state with pressure dependent shear plasticity in Abaqus Explicit Enhancements to Johnson Cook strain rate dependence Tension cutoff Ignition and growth equation of state Linear pipe elements in Abaqus Explicit Eulerian mesh motion in Abaqus Explicit Reading nodal output for temperature normalized concentration and electric potential from an output database into predefined field variables CONWEP blast loading in Abaqus Explicit VCCT in Abaqus Explicit Beam contact thickness in Abaqus Explicit Combining data from multiple output databases New output variables for connectors Field output for connectors Improvements to filtered field output Define fluid exchange via user subroutines VUFLUIDEXCHEFFAREA and VUFLUIDEXCH Utility routines to obtain principal stress strain values and directions in Abaqu
226. us analysis product functionality Description In Abaqus CAE you can specify a value for the universal gas constant when you create a model or when you edit the model attributes in an existing model Abaqus CAE Usage All modules Model Create Model type Standard amp Explicit Universal gas constant Model Edit Attributes Universal gas constant Reference Abaqus CAE User s Manual e Specifying model attributes Section 9 8 4 in the online HTML version of this manual 4 21 MODEL IMPORT AND EXPORT 5 Model import and export This chapter discusses features related to importing parts into Abaqus CAE and repairing problematic geometry It provides an overview of the following enhancements e Streamlined part and assembly import from Elysium Neutral files Section 5 1 e Model import from ANSYS input files Section 5 2 e Running CAD software in the background after changes to CAD parameters Section 5 3 e Automatic geometry repair during part import Section 5 4 e Import and export of model data from stereolithography files Section 5 5 e NX associative import Section 5 6 5 1 Streamlined part and assembly import from Elysium Neutral files Product Abaqus CAE Benefits Abaqus CAE now provides a single option for import of parts or assemblies from Elysium Neutral files This enhancement improves the usability of the part import and assembly import options in Abaqus CAE if you w
227. version of this manual e Offset faces Section 67 6 7 in the online HTML version of this manual e Extend faces Section 67 6 8 in the online HTML version of this manual e Blend faces Section 67 6 9 in the online HTML version of this manual 4 10 Improvements to repair of small edges and small faces Product Abaqus CAE Benefits Abaqus CAE no longer restricts the size of the small edges or small faces that you can repair using the tools in the Geometry Edit toolset This enhancement provides greater flexibility and control for the repair of small components in your model Description The Repair Small Edges and Repair Small Faces tools in the Geometry Edit toolset now attempt to repair all the faces or edges that you select Previously these tools repaired only the selected faces or edges that were smaller than an internal tolerance setting When you use these tools to repair your model you should first query for the small edges or small faces you want to repair add the appropriate small geometry to a set and then perform your repairs on that set Abaqus CAE Usage Part module Tools Geometry Edit Edge Repair small Tools Geometry Edit Face Repair small 4 10 MODELING References Abaqus CAE User s Manual e Repairing small edges Section 67 5 2 in the online HTML version of this manual e Repairing small faces Section 67 6 4 in the online HTML version of this manual 4 11 Automatic validi
228. y be trademarks or service marks of their respective owners For additional information concerning trademarks copyrights and licenses see the notices at http www simulia com products products_legal html The Abaqus Software and its documentation includes processes under U S Patents 5 920 491 6 044 210 and 6 697 770 Dassault Syst mes or its subsidiaries may also have other patents or pending patent applications trademarks copyrights or other intellectual property rights covering Abaqus Software and or its documentation No license of such patents trademarks copyrights or other intellectual property rights is provided or implied except as may be expressly provided in a written license agreement from Dassault Systemes or its subsidiary OPEN SOURCE PROGRAMS This release of the Abaqus Software uses several open source or free programs OS Programs Each such program is distributed with Abaqus software in binary form and except as permitted by the applicable license without modification Each such program is available online for free downloading and if required by the applicable OS Program license the source code will be made available by Dassault Systemes or its subsidiary upon request For a complete list of OS Programs utilized by Abaqus as well as licensing documentation for these programs see http www simulia com products products_legal html HP MPI LICENSE TERMS HP MPI is included with this release of Abaqus software HP
229. y cs S Additional rotation angles degrees Aboutaxiss 1 23 OK Cancel Figure 11 10 Coincident Point Builder dialog box Product Abaqus CAE 11 19 11 18 Support for position tolerance and adjustment of the slave surface initial position for cyclic symmetry interactions in Abaqus CAE INTERACTIONS Benefits You can now specify settings for position tolerance and for adjustment of the initial position of the slave surface when you define cyclic symmetry in an Abaqus CAE model Description Abaqus CAE now enables you to specify the following additional settings when you define a cyclic symmetry interaction e The position tolerance which defines the distance within which Abaqus will tie nodes on the slave surface to the master surface e The ability to prevent Abaqus from moving all tied nodes on the slave surface onto the master surface By default this option is toggled on and all tied nodes are moved in the initial configuration without applying strains to the model Abaqus CAE Usage Interaction module Interaction Create Cyclic symmetry Standard choose surfaces and points of symmetry Position Tolerance options and Adjust slave surface initial position Reference Abaqus CAE User s Manual e Defining cyclic symmetry Section 15 13 16 in the online HTML version of this manual 11 20 MESHING 12 Meshing This chapter discusses features related to meshing your model
230. y subset of elements in an analysis This enhancement provides an additional tool for postprocessing of thermal analyses Description You use the Volume Weighted Average Temperature plug in shown in Figure 13 6 with an output database odb file The elements in which the average temperature will be calculated can be picked in the viewport or selected from a predefined named set The temperature result can be requested at the current time for the model displayed in the viewport or as an X Y time curve over all steps in the analysis Abaqus CAE Usage Visualization module Plug ins Tools Volume Weighted Average Temperature Reference Abaqus CAE User s Manual e Finding the average temperature of a set of elements Section 79 15 in the online HTML version of this manual 13 11 New output variables for connectors Products Abaqus Explicit Abaqus CAE Benefits You can now obtain derived displacement and derived force output for connectors Description Two new field and history output variables are added for connector derived components in Abaqus Explicit CDERF is the connector derived force and CDERU is the connector derived displacement 13 9 OUTPUT AND VISUALIZATION E Yolume Weighted AverageTemperature x Time Current step frame C All steps M Elements Select From viewport Select Element Sets Clear Selection X Data G rye names Note xY Data is applicable only
231. y to easily define orientations based on the topology of a part provides a convenient method for defining an orientation on curved shapes Description Material orientations and orientations for composite layups can now be defined using discrete orientations A discrete orientation defines a spatially varying orientation for each native or orphan mesh element and can be based on the topology of the part which allows you to define a continually varying orientation You define the normal axis and primary axis and Abaqus CAE uses these axes to construct a right handed Cartesian coordinate system You choose the coordinate system axis that you want the normal axis and primary axis to represent in the resultant orientation and you select topology or datums or enter vector values to define the desired axes Abaqus CAE Usage Property module Edit Material Orientation dialog box or composite layup editor Definition Discrete define normal axis and primary axis Reference Abaqus CAE User s Manual e Using discrete orientations for material orientations and composite layup orientations Section 12 15 in the online HTML version of this manual 4 19 Querying mass properties for beams and trusses Product Abaqus CAE Benefits The mass properties of beam and truss section types can now be determined in Abaqus CAE The data that these queries provide enable you to more effectively refine your model Description You can now determine the
232. ysis the LOAD CASE parameter has been replaced by the REAL and IMAGINARY parameters to define real and imaginary loading Use the new CONWEP parameter to indicate interaction with a blast wave from an explosion in air This parameter applies only to Abaqus Explicit analyses mod E INCIDENT WAVE INTERACTION PROPERTY Two new values are available for the TYPE parameter Set TYPE AIR BLAST or TYPE SURFACE BLAST to indicate interaction with a blast wave from an explosion in air mod S E INITIAL CONDITIONS Use the new OUTPUT VARIABLE parameter in conjunction with the TYPE FIELD and FILE parameters to initialize predefined fields using nodal temperatures NT normalized concentrations NNC and electric potentials EPOT read from previously generated output databases The INTERPOLATE parameter can now be used in conjunction with the TYPE PORE PRESSURE and FILE parameters to initialize pore pressures from previously generated output databases with dissimilar meshes mod S LATENT HEAT The new PORE FLUID parameter has been added to allow specification of the latent heat of the pore fluid in a geostatic or soils consolidation analysis that models heat transfer in a fully coupled manner with the pore fluid flow and the mechanical deformations mod S MATRIX INPUT Use the new TYPE parameter to define the shape symmetric or unsymmetric of the matrix mod E MOHR COULOMB This option can now be used in Abaqus Explicit to define the

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