LS-DYNA R7.0.0 (R7.79069) released Release notes for Version R7
Contents
1. Meme design LS DYNA R7 0 0 R7 79069 released Filed under release note New version of LS DYNA is released for all common platforms Release notes for Version R7 0 0 Herein are summarized most of the new features enhancements and significant corrections made since the previous release 971 R6 1 1 New features are listed first in no particular order Enhancements and corrections are then listed by category I LICENSE In the license file necessary to run R7 0 0 1 the program names are LS DYNA and MPPDYNA and 2 The OPTION is REVISION 7 Note that we have removed 971 from the program names For example here s an excerpt from a R7 0 0 license file LS DYNA 12312013 OPTION REVISION 7 MPPDYNA 12312013 OPTION REVISION 7 Il DOCUMENTATION The R7 0 0 Keyword User s Manual can be downloaded from www t stc com download manuals lll NOTES Three solvers EM CESE and ICFD which are new in this release Please note that these solvers are currently only supported in a subset of the double precision R7 0 0 executables please refer to http ftp lstc com user ls dyna R7 0 0 README_ first SMP and http ftp Istc com user mpp dyna R7 0 0 README MPP for details A new volume mesher supporting the ICFD and CESE solvers Other new features enhancements and significant corrections not included in the previous LS DYNA release version 971 R6 1 1 E FLOTREND E New R7 Electromagnetic EM so2. CONTROL_ FORMING_ONESTEP and for trim line develooment CONTROL_FORMING_UNFLANGING Made improvements and added features to previously undocumented keyword CONTROL_FORMING_UNFLANGING This keyword unfolds flanges of a deformable blank e g flanged or hemmed portions of a sheet metal part onto a rigid tooling mesh using the implicit static solver using the implicit static solver It is typically used in trim line mapping during a draw die development process The roots of the flanges or hemmed edges are automatically processed based on a user input of a distance tolerance between the flanges hnemmed edges and rigid tool It includes the ability to handle a vertical flange wall Other keywords related to blank size development are CONTROL_FORMING_ONESTEP and INTERFACE_BLANKSIZE_DEVELOPMENT Added keyword CONTROL_FORMING_OUTPUT which allows control of d3plot output by specifying distances to tooling home It works with automatic position of stamping tools using CONTROL_FORMING_AUTOPOSITION_ PARAMETER rs hee design Added the LOCAL_SMOOTH option to INTERFACE_COMPENSATION_NEW which features smoothing of a tool s local area mesh which could otherwise become distorted due to e g bad coarse mesh of the original tool surface tooling pairs for example flanging post and flanging steel do not maintain a constant gap several compensation iterations This new option also allows for multiple regions to be smooth
3. in a first phase and a viscoelastic sintering model that should be run in a second phase This model is for solid elements For IHYPER 3 on a MAT_USER_DEFINED__ shell material the deformation gradient is calculated from the geometry instead of incremented by the velocity gradient The deformation gradient is also passed to the user defined subroutines in the global system together with a transformation matrix between the global and material frames This allows for freedom in how to deal with the deformation gradient and its transformations in orthotropic layered materials The Bergstrom Boyce viscoelastic rubber model is now available in explicit and implicit analysis as MAT_269 MAT_BERGSTROM_BOYCE_RUBBER The Arruda Boyce elastic stress is augmented with a Bergstrom Boyce viscoelastic stress corresponding to the response of a single entangled chain in a polymer gel matrix Added a new parameter IEVTS to MAT_USER_DEFINED_MATERIAL_MODELS MAT_041 050 IEVTS is optional and is used only by thick shell formulation 5 It points to the position of E a in the material constants array Following E a the next 5 material constants must be E b E c v ba v ca and v cb This data enables thick shell formulation 5 to calculate an accurate thickness strain otherwise the thickness strain will be based on the elastic constants pointed to by IBULK and IG Implemented enhancements to fabric material MAT_034 FORM 14 as follows Stress
4. strain curves may include a portion for fibers in compression ee design When unload reload curves with negative curve ID are input curve stretch options the code that finds the intersection point now extrapolates the curves at their end rather than simply printing an error message if an intersection point cannot be found before the last point in either curve Fix bug in output of crack data for MAT_084 MPP only ALE Map 1D to 3D by beam volume averaging the 1D data over the 3D elements INITIAL_ALE_MAPPING In a 3D to 3D mapping INITIAL_ALE_MAPPING map the relative displacements for the penalty coupling in CONSTRAINED_LAGRANGE_IN_SOLID The xy files associated with DATABASE_ALE_MAT are now created when sense switches sw1 sw2 quit or stop are issued ALE_ESSENTIAL_BOUNDARY is available in 2D DATABASE_FSI is available for 2D MPP ALE_ESSENTIAL_BOUNDARY implemented to apply slip only velocity BC along ALE mesh surface CONTROL_ALE flag INIJWL 2 option added to balance initial pressure state between ALE Soil and HE SPH Include SPH element ELEMENT_SPH in time step report Time step and internal energy of 2D axisymmetric SPH elements are calculated in a new way more consistent with the viscosity force calculation Only apply viscosity force to x and y components of 2D axisymmetric SPH element not on hoop component MAXV in CONTROL_SPH can be defined as a ne
5. AT_ELASTIC_VISCOPLASTIC_THERMAL Add visco effect for implicit EFG solid type 42 Add new EFG solid type 43 called Meshfree Enriched FEM MEFEM for both implicit and explicit This element formulation is able to relieve the volumetric locking for nearly incompressible material eg rubber and performs strain smoothing across elements with common faces EFG shell adaptivity no longer requires a special license Application of EFG in an implicit analysis no longer requires a special license S a moKa design Implicit Fix sign for resultant moments for joints using implicit jntforc Fix numerous problems with stress recovery for mode shapes especially for intermittent eigenvalue analysis Fix output of forces pertaining to prescribed motion bndout for implicit Fix INTERFACE_LINKING problem for SMP implicit Fix implicit output of spcforc for CONSTRAINED_COORDINATE Fix implicit BOUNDARY_SPC with birth time and death time Add SENSOR_CONTROL for prescribed motion constraints in implicit Update INTERFACE_LINKING_NODE in implicit to catch up with explicit including adding scaling factors Add support for DATABASE_RCFORC_MOMENT for implicit Enhance Iterative solvers for Implicit Mechanics Add after the first implicit time step the output of projected cpu and wall clock times This was already in place for explicit Also echo the termination time Fix an issue with implicit storing the resu
6. CABLE in case some processor has no slave nodes Fixes to MPP reporting of element controlling the time step Introduction of new timing routines and summary at termination Echo MPP contact is groupable flag to d3hsp For MPP groupable tied contact only output of part IDs for MAT_100_DA spotwelds DEFINE_CONNECTION_ PROPERTIES was missing Bodies using MAT_RIGID_DISCRETE were never expected to share nodes with non rigid bodies but this now works in MPP Fix variable initialization that resulted in MPP writing bad intfor data DATABASE_BINARY_INTFOR on some systems There is no longer any built in limitation on the number of processors that may be used in MPP Echo contents of the MPP pfile including keyword additions to the d3hsp and mes0000 files Add new keyword CONTROL_MPP_PFILE which allows for insertion of text following this command to be inserted into the MPP pfile p pfile Change in MPP treatment of CONSTRAINED_TIE BREAK They now share a single MPI communicator and a single round of communication This should improve performance for problems with large numbers of these without affecting the results Fix MPP decomposition error for LOAD_BODY_GENERALIZED that could result in these forces being applied incorrectly in some cases Fix summation order for CONSTRAINED_LAGRANGE_IN_SOLID CTYPE 2 for rebar This will avoid the round off error causing slightly different shared nodal velocity
7. D for describing the latent heat generation during phase transormations Added support for table definition for Youngs modulus Now you can have one temperature dependent curve for each of the 5 phases Bugfixes to MAT _244 Fixed a bug related to thick shell formulation 1 Fixed an error in load curves when using temperature dependent variables Youngs modulus and poissons ratio Fixed a problem when using dynain files Added support for implicit to MAT_188 Added material model MAT_273 MAT_CDPM MAT_CONCRETE_DAMAGE_PLASTIC_MODEL This model is aimed at simulations where failure of concrete structures subjected to dynamic loadings is sought The model is based on effective stress plasticity and has a damage model based on both plastic and elastic strain measures Implemented for solids only but both for explicit and implicit simulations Using an implicit solution when damage is activated may trigger a slow convergense IMFLAG 4 or 5 can be useful Added an option in MAT_266 MAT_TISSUE_DISPERSED so that the user can tailor the active contribution with a time dependent load curve instead of using the internal hardcoded option See ACT 10 in the User s Manual Fixed a problem related to the shell thickness update ISTUPD in CONTROL_SHELL and MAT_255 MAT_173 MAT_MOHR_COULOMEB is available in 2D Fix a bug affecting evolution type failure IDAM of MAT_ADD_EROSION lt 0 is applied to shell element o
8. OUSTIC_MAPPING for mapping transient structural nodal velocity to acoustic volume surface nodes This is useful if the structure finite element mesh and the acoustic boundary finite element mesh are mismatched Control ALE_REFINE has been replaced and expanded upon by the CONTROL_REFINE family of commands These commands invoke local mesh refinement of shells solids and ALE elements based on various criteria Shells or solids in a region selected for refinement parent element are replaced by 4 shells or 8 solids respectively CONTROL_REFINE_SHELL applies to shells ys 1 moKe design CONTROL_REFINE_SOLID applies to solids CONTROL_REFINE_ALE and CONTROL_REFINE_ALE2D applies to ALE elements Each keyword has up to 3 lines of input If only the 1st card is defined the refinement occurs during the initialization The 2nd card defines a criterion CRITRF to automatically refine the elements during the run If the 3rd card is defined the refinement can be reversed based on a criterion CRITM All commands are implemented for MPP CONTROL_REFINE_MPP_DISTRIBUTION distributes the elements required by the refinement across the MPP processes Fixed bug in CONTROL_STAGED_CONSTRUCTION whereby staged construction was not working with the combination of Hughes Liu beams and CONTROL_ACCURACY Constrained Added keyword CONSTRAINED_MULTIPLE_GLOBAL for defining multi node constraints for imposing periodic boundary condit
9. RANGE_DEFORM to damp only the deformation instead of the global motion Fixed bug affecting models containing both DAMPING_GLOBAL and DAMPING_FREQUENCY_RANGE This combination is not recommended and generates a warning message but such models could previously generate unpredictable error messages Added DEFINE_VECTOR_NODES A vector is defined using two node IDs Add sense switch prof to output current timing profile to messag SMP file or mes MPP files Also for MPP only collect timing information from processor and output to prof out when sense switch prof is detected
10. atures CESE method Conservation Element Solution Element used for CFD solver Highly accurate shock wave capturing Cavitation model Embedded immersed boundary approach or moving fitting approach for FSI problems Coupled stochastic fuel spray solver See STOCHASTIC keywords Coupling with chemistry See CHEMISTRY keywords solver Solver Applications Non exhaustive Shock wave capturing Shock acoustic wave interaction Cavitating flows Conjugate heat transfer problems Many different kinds of stochastic particle flows e g dust water fuel Chemically reacting flows e g detonating flow supersonic combustion E FLOTREND E New R7 Incompressible CFD ICFD solver Keyword family ICFD_ The keywords starting with ICFD refer to and control the incompressible CFD solver problem set up Solver Characteristics Implicit Double precision Dynamic memory handling SMP and MPP 2D solver 3D solver Makes use of an automatic volume mesh generator for fluid domain See MESH keywords Coupling with structural and thermal LS DYNA solvers Solver Main Features Incompressible fluid solver Thermal solver for fluids Free Surface flows Two phase flows Turbulence models Transient or steady state problems Non Newtonian fluids Boussinesq model for convection Loose or strong coupling for FSI Fluid structure interaction Exact boundary condition
11. biaxial as history variables no 16 17 and 18 for MAT_ 187 Add new variables to user failure routine matusr_24 activated by FAIL lt 0 on MAT_024 and other materials integration point numbers and element id Add new energy based nonlocal failure criterion for MAT_ADD_EROSION parameters ENGCRT critical energy and RADCRT critical radius after EPSTHIN Total internal energy of elements within a radius RADCRT must exceed ENGCRT for erosion to occur Intended for windshield impact Add new option to MAT_054 for thin shells Load curves for rate dependent strengths and a rate averaging flag can be defined on new optional card 9 Add new option for MAT_MUSCLE Input parameter SSP lt 0 can now refer to a load curve stress vs stretch ratio or a table stress vs stretch ratio vs normalized strain rate Expand list of variables for MAT_USER_DEFINED_MATERIAL_MODELS by characteristic element size and element id Enable MAT_USER_DEFINED_MATERIAL_MODELS to be used with tetrahedron element type 13 New sample routines umat41_t13 and umat41v_t13 show corresponding pressure calculation in the elastic case aaae y e moKa design Fix for MAT_119 with initial displacements IUR IUS IUT IWR IWS IWT which were erroneously applied twice Fix for MAT_083 with damage hysteresis TBID lt 0 or HU gt 0 Combination with FMATRX 2 on CONTROL_SOLID default in implicit could lead to uninitialized energies and consequential
12. d to assign porosity values in material coordinate system Added LOAD_SEGMENT FILE Sensor Add new sensor definition SENSOR_DEFINE_ANGLE This card traces the angle formed between two lines SENSOR_DEFINE_NODE can be used to trace the magnitude of nodal values coordinate velocity or accleration when VID is 0 or undefined Add two new parameters to SENSOR_DEFINE_ELEMENT scale factor and power so that user can adjust the element based sensor values strain stress force Material Change history variables 10 12 in MAT_054 MAT_ENHANCED_COMPOSITE_DAMAGE thin shells only to represent strains in material coordinate system rather than in local element coordinate system This is a lot more helpful for postprocessing issues This change should not lead to different results other than due to different round off errors New features and enhancements to MAT_244 MAT_UHS_ STEEL Added implicit support for MAT_244 Changed the influence of the austenite grain size in MAT_244 according to Li et al Changed the start temperatures to fully follow WATT et al and Li et al ys moKe design Hardness calculation is now improved when noncontinuous cooling is applied i e tempering Added temperature dependent Poisson ratio and advanced reaction kinetics Added new advanced option to describe the thermal expansion coefficients for each phase Added option to use Curve ID or a Table I
13. del for solid MAT_082 Added Feng s failure model to solid MAT_021 Added MAT_027 for beams Added DEFINE_HAZ_PROPERTIES and DEFINE_TAILOR_WELDED_BLANK for modifying material behavior near a spot weld Added fourth rate form to viscoplastic Johnson Cook model MAT_015 sie moKe design Added option to MAT_ 224 to not delete the element if NUMINT 200 New damage initiation option 3 in multi fold damage criteria in MAT_ADD_EROSION Very similar to option 2 but insensitive to pressure Rotational resistance in MAT_034 MAT_FABRIC Optionally the user may specify the stiffness yield and thickness of and elastic perfectly plastic coated layer of a fabric that results in a rotational resistance during the simulation FLDNIPF lt 0 in MAT_190 MAT_FLD_3 PARAMETER_BARLAT for shell elements means that failure occurs when all integration points within a relative distance of FLDNIPF from the mid surface has reached the fld criterion A computational welding mechanics MAT_270 MAT_CWM material is available that allows for element birth based on a birth temperature as well as annealing based on an annealing temperature The material is in addition a thermo elasto plastic material with kinematic hardening and temperature dependent properties MAT_271 MAT_POWDER is a material for manufacturing i e compaction and sintering of cemented carbides It is divided into an elastic plastic compaction model that is supposed to be run
14. ed Local areas are defined by SET_LIST_NODE_SMOOTH Discrete Element Method Added output to rcforc for DEFINE_DE_TO SURFACE _ COUPLING Implement traction surface for DEFINE_DE_TO_SURFACE_COUPLING Add keyword DATABASE_BINARY_DEMFOR with command line option dem dem_int_force This will turn on the DEM interface force file for DEM coupling option The output frequency is controlled by the new keyword Add new feature DEFINE_DE_INJECTION to allow DEM particle dropping from user defined plane Add new option VOLUME to ELEMENT_DISCRETE_SPHERE This will allow DEM input based on per unit density and use MAT card to get consistent material properties Isogeometric Elements Added FORM 4 for ELEMENT_SHELL_NURBS_PATCH Rotational dofs are automatically set at control points at the patch boundaries whereas in the interior of the patch only translational dofs are present This helps for joining multiple nurbs patches at their CO boundaries Disabled FORM 2 and 3 for ELEMENT _SHELL_ NURBS_PATCH These formulations are experimental and not fully validated yet Added energy computation for isogeometric shells ELEMENT _SHELL_NURBS_PATCH to matsum Allow isogeometric shells ELEMENT_SHELL_NURBS_PATCH to behave as rigid body MAT_RIGID OO ii moKe design Fix for degenerated isogeometric shells ELEMENT_SHELL_NURBS_PATCH that share multiple control points at the same physical location which results in a not w
15. ell defined element normal This caused stability problems and error terminations Miscellaneous Fix a bug affecting INCLUDE_TRANSFORM that refers to a transformation DEFINE_TRANSFORMATION involving SCALE Added g as abbreviation for gigawords in specification of memory on execution line e g memory 16g is 16 billion words Suppress non printing characters in COMMENT output Add command line option pgpkey to output the current public PGP key used by LS DYNA The output goes to the screen as well as a file named Istc_pgpkey asc suitable for directly importing into GPG When reading the NAMES file allow a anywhere on a line to indicate there will be a following line not just at the end This was never intended but worked before r73972 and some customers use it that way Check for integer overflow when processing command line arguments and the memory value on the KEYWORD card Added new capability for INTERFACE_LINKING_NODE to scale the displacements of the moving interface Several fixes for internal CASE driver Fix problem of LSDA file names getting mangled in the restart file which was causing file reopening problems during restarts Support for KEYWORD_JOBID with internal CASE driver DAMPING_FREQUENCY_RANGE now works for implicit dynamic solutions An error check has been added to ensure that the timestep is small enough for the damping card to work correctly Added new option DAMPING_FREQUENCY_
16. f MAT_015 Fix a bug in the general Darcy s law pore air flow calculation triggered when the pore air pressure gradient fell outside the range of the input curve MAT_ADD_PORE_AIR Fix a bug in the user defined failure subroutine matusr_24 optional for MAT_024 and others whereby the failure flag fail i was stored incorrectly OO iz moka design Enable MAT_103 and MAT_ 104 to discretize the material load curves according to the number of points specified by LCINT in CONTROL_SOLUTION Implement Prony series up to 18 terms for shells using MAT_076 MAT_GENERAL_VISCOELASTIC Added DEFINE_STOCHASTIC_VARIATION and the STOCHASTIC option for MAT_010 MAT_015 MAT_024 MAT_081 MAT_098 for shells solids and type 13 tets This feature defines a stochastic variation in the yield stress and damage failure of the aforementioned material models Minor modification for DEFINE_CONNECTION_PROPERTIES PROPRUL 2 thinner weld partner is first partner PROPRUL 3 bottom nodes 1 2 3 4 weld partner is first partner Add spotweld area to debug output of DEFINE CONNECTION PROPERTIES which is activated by CONTROL_DEBUG Add support of MAT_ADD_EROSION option NUMFIP lt 0 for standard non GISSMO failure criteria Only for shells Improve implicit convergence of MAT_ADD_EROSION damage model GISSMO by adding damage scaling 1 D to the tangent stiffness matrix Provide plastic strain rates tension compression shear
17. gative number to turn off velocity checking Improve calculation of 2D axisymmetric SPH contact force in DEFINE_SPH_TO_SPH_COUPLING Added the following material models for SPH particles MAT_004 MAT_ELASTIC_PLASTIC_THERMAL 3D only rs heme design MAT_106 MAT_ELASTIC_VISCOPLASTIC_THERMAL Added a new parameter DFACT for DEFINE_SPH_TO_SPH_COUPLING DFACT invokes a viscous term to damp the coupling between two SPH parts and thereby reduce the relative velocity between the parts Added BOUNDARY_CONVECTION and BOUNDARY_RADIATION for explicit SPH thermal solver Fix bug for SPH symmetric boundary conditions CONTROL_SPH EFG CONTROL_REMESHING_EFG Add eroding failed surface elements and reconstructing surface in EFG adaptivity Add a control parameter for monotonic mesh resizing in EFG adaptivity Add searching and correcting self penetration for adaptive parts in 3D tetrahedron remeshing Enhance 3D axisymmetric remeshing with 6 node 8 node elements CONTROL_REMESHING Use RMIN RMAX along with SEGANG to determine element size Remove the restriction that the reference point of computational model has to be at original point 0 0 0 Rewrite the searching algorithm for identifying the feature lines of cross sections in order to provide more stable remeshing results Improve rigid body motion in EFG shell type 41 Support EFG pressure smoothing in EFG solid type 42 for M
18. imposition for FSI problems Solver Applications Non exhaustive External aerodynamics for incompressible flows Internal aerodynamics for incompressible flows Sloshing Slamming and Wave impacts FSI problems S FLOTREND arn eet A Conjugate heat transfer problems New R7 Volume Mesh generator Keyword family MESH_ The keywords starting with MESH refer to and control the tools for the automatic volume mesh generator Mesh Generator Characteristics Automatic Robust Generic Tetrahedral elements for 3D Triangles in 2D Closed body fitted mesh surface mesh needs to be provided for volume generation Mesh Generator Main Features Automatic remeshing to keep acceptable mesh quality for FSI problems ICFD only Adaptive meshing tools ICFD only Anisotropic boundary layer mesh Mesh element size control tools Remeshing tools for surface meshes to ensure mesh quality Mesh Generator Applications Used by the Incompressible CFD solver ICFD Used by the Compressible CFD solver CESE Add new parameter VNTOPT to AIRBAG_HYBRID that allows user more control on bag venting area calculation Allow heat convection between environment and CPM bag AIRBAG_PARTICLE bag Apply proper probability density function to part s temperature created by the particle impact ry 5 moKa design z AIRBAG_PARTICLE SENSOR_SWITCH_SHELL_TO_VENT allows user to input load curve to control the venting us
19. incorrect unloading behavior Fix for MAT_104 For FLAG 1 anisotropic damage it was possible that the load curve number of LCSS was changed internally Fix for combination of INCLUDE_TRANSFORM with FCTTIM ne 1 0 and material tables with logarithmic strain rates The transformation of these logarithmic strain rates is correct now Add a new feature to MAT_125 allowing C1 and C2 to be used in calculation of back stress When plastic strain lt 0 5 C1 is used otherwise C2 is used as described in Yoshida s paper Extend non linear strain path _NLP_FAILURE in MAT_037 to implicit MAT_173 MAT_MOHR_COULOMB now works in ALE A new option has been added to suppress the tensile limit on hydrostatic stress recommended for ALE multi material use Upgraded MAT_172 MAT_CONCRETE_EC2 Corrections to DEGRAD option Fix bug affecting shells not beams When an element has two cracks and one crack is under compression while the other is still widening the element could erroneously shrink in the compression direction Another symptom of the same bug would be that if two cracks are opening at the same time in the same element one or both might not follow the expected stress crack opening curve Concrete and reinforcement types 7 and 8 have been added to reflect changes to Eurocode 2 Extra history variables for reinforcement stress and strain are now output as zero for zero fraction reinforcement directions Added RCDC mo
20. ing choking flow equation to get proper probability function for vents Therefore this vent will have the same vent rate as real vent hole Add new option NP2P in CONTROL_CPM to control the repartition frequency of CPM particles among processors MPP only Enhance AIRBAG_PARTICLE to support a negative friction factor FRIC or PFRIC in particle to fabric contact Particles are thus able to rebound at a trajectory closer to the fabric surface after contact Use heat convection coefficient HCONV and fabric thermal conductivity KP to get correct effective heat transfer coefficient for heat loss calculation in AIRBAG_PARTICLE h_effective 1 1 H shell_thickness kP If KP is not given H will be used as effective heat transfer coefficient Extend CPM inflator orifice limit from 100 to unlimited AIRBAG_PARTICLE Support dm_in_dt and dm_out_dt output to CPM chamber database DATABASE_ABSTAT to allow user to study mass flow rate between multiple chambers Boundary Previously the number of ships rigid bodies in BOUNDARY_MCOL as specified by NMCOL was limited to 2 Apparently this was because the code had not been validated for more than 2 rigid bodies but it is believed that it should not be a problem to remove this restriction Consequently this limit has been raised to 10 with the caveat that the user should verify the results for NUCOL gt 2 Implemented a structural acoustic mapping scheme BOUNDARY_AC
21. ions Enhancement for CONSTRAINED_INTERPOLATION_SPOTWELD SPR3 calculation of bending moment is more accurate now If CONSTRAINED_NODAL_RIGID_BODY nodes are shared by several processors with mass scaling on the added mass is not summed up across processors This results in an instability of the NRB MPP only Contact CONTACT_FORMING_ONE_WAY_SURFACE_TO_SURACE_ORTHO_FRICTION c an now be defined by part set IDs when supplemented by DEFINE_FRICTION_ORIENTATION Segment sets with orientation per DEFINE_FRICTION_ORIENTATION are generated automatically Contact force of CONTACT_ENTITY is now available in intfor DATABASE_BINARY_INTFOR Fix for CONTACT_AUTOMATIC_ _ TIEBREAK options 9 and 11 element size dependent failure stresses NFLS SFLS lt 0 were not working correctly in MPP Fix for CONTACT_AUTOMATIC_ _ TIEBREAK options 7 and 10 in MPP no more unexpected high forces and subsequent instability S a moKa design CONTACT_FORCE_TRANSDUCER_PENALTY will now accept node sets for both the slave and master sides which should allow them to work correctly for eroding materials BOTH sides should use node sets or neither Added option to create a backup penalty based contact for a tied constraint based contact in the input IPBACK on Card E of CONTACT New option for CONTACT_ENTITY If variable SO is set to 2 then a constraint like option is used to compute the forces in the normal direction Friction is t
22. ltant forces for CONSTRAINED_SPOTWELD Thermal Add variable MXDMP in CONTROL_THERMAL_SOLVER to write thermal conductance matrix and right hand side every MXDMP time steps Add keyword CONTROL_THERMAL_EIGENVALUE to calculate eigenvalue s of each thermal conductance matrix New thermal material keyword gt MAT_THERMAL_ORTHOTROPIC_TD_LC This is an orthtropic material with temperature dependent properties defined by load curves Change in structured file format for control card 27 first thermal control card Several input variables used i5 format limiting their value to 99 999 A recent large model exceeded this limit The format was changed to i10 This change is not backward compatible Old structured input files will no longer run unless control card 27 is changed to the new i10 format This change does not affect the KEYWORD file Fix coupled thermal solution for problems using thick thermal shells 5 moKa design Fix computation of assembled stiffness matrix for the unsymmetric case Should only affect coupled thermal implicit mechanical problems in MPP Thermal material MAT_T07 MAT_THERMAL_CWM for welding simulations to be used in conjunction with MAT_270 MAT_CWM mechanical counterpart MPP Modify decomposition costs of MAT_181 and MAT_ 183 Fix transfer of mes files at code termination Fix for possible problem in CONTROL_MPP_DECOMPOSTION_ARRANGE_PARTS Fix for MPP CONTACT_GUIDED_
23. lver Keyword family EM_ The keywords starting with EM refer to and control the Electromagnetic solver problem set up Solver Characteristics Implicit Double precision Dynamic memory handling SMP and MPP 2D axisymmetric solver 3D solver Automatic coupling with structural and thermal LS DYNA solvers FEM for conducting pieces only no air mesh needed FEM BEM system Solid elements for conductors shells can be insulators Solver Main Features Eddy Current a k a Induction Diffusion solver Induced heating solver Resistive heating solver Imposed tension or current circuits Exterior field Magnetic materials beta version Electromagnetic contact EM Equation of states Conductivity as a function of temperature Solver Applications Non exhaustive Electromagnetic forming Electromagnetic welding Electromagnetic bending Inductive heating Resistive heating Rail gun Ring expansions New R7 Compressible CFD CESE solver Keyword family CESE_ The keywords starting with CESE refer to and control the Compressible CFD solver problem set up Solver Characteristics Explicit Double precision Dynamic memory handling SMP and MPP 3D solver special case 2D solver and 2D axisymmetric solver Automatic coupling with structural and thermal LS DYNA solvers Eulerian fixed mesh or moving mesh Either type input with ELEMENT_SOLID cards or using MESHcards Solver Main Fe
24. ng implicit transient analysis Implemented coupling between steady state dynamics and collocation acoustic BEM Implemented Acoustic Transfer Vector ATV to variational indirect BEM acoustics Enabled boundary acoustic mapping in BEM acoustics FREQUENCY_DOMAIN_ACOUSTIC_FEM Added boundary nodal velocity to binary plot file d3acs Implemented pentahedron elements in FEM acoustics Enabled using boundary acoustic mapping in FEM acoustics FREQUENCY_DOMAIN_FRF Updated FRF to include output in all directions VAD2 4 Added treatment for FRF with base acceleration node id can be 0 ees lt n moKe design FREQUENCY_DOMAIN_RANDOM_VIBRATION Updated calculating PSD and RMS von Mises stress in random vibration environment based on the Report of Sandia National Laboratories 1998 FREQUENCY_DOMAIN_RANDOM_VIBRATION_FATIGUE Implemented an option to incorporate initial damage ratio in random vibration fatigue FREQUENCY_DOMAIN_RESPONSE_SPECTRUM Implemented double sum methods based on Gupta Cordero coefficient modified Gupta Cordero coefficient and Rosenblueth Elorduy coefficient Updated calculating von Mises stress in response spectrum analysis Implemented treatment for multi simultaneous input spectra Improved double sum methods by reducing number of loops FREQUENCY_DOMAIN_SSD Added the option to output real and imaginary parts of frequency response to d3ssd Added the
25. on echo processor MPP only rs moka design Forming Added two input variables for CONTROL_FORMING_ONESTEP simulation TSCLMIN is a scale factor limiting the thickness reduction EPSMAX defines the maximum plastic strain allowed Added output of strain and stress tensors for onestep solver CONTROL_FORMING_ONESTEP to allow better evaluation of formability Improved CONTACT_AUTO_MOVE Before Changes the termination time and it causes problems when several tools need to be moved Now Does not change the termination time but changes the current time In this way several tools can be moved without the need to worry about the other tool s move This is especially useful in multi flanging and hemming simulations Made improvements to previously undocumented keyword INTERFACE_BLANKSIZE including adding the options _INITIAL_TRIM and _INITIAL_ADAPTIVE This keyword was developed for blank size development in sheet metal forming Generally for a single forming process only the option DEVELOPMENT is needed and inputs are an initial estimated blank shape a formed blank shape and a target blank shape in either mesh or boundary coordinates Output will be the calculated corrected initial blank shape Initial blank mesh and formed blank mesh can be different e g adaptive For a multi stamping process involving draw trimming and flanging all three options are needed Related commands for blank size estimation are
26. option to output relative displacement velocity and acceleration in SSD computation in the case of base acceleration Previously only absolute values were provided Implemented keyword FREQUENCY_DOMAIN_MODE_ OPTION so that user can select the vibration modes to be used for frequency response analysis Implemented keyword SET_MODE_ OPTION so that user can define a set of vibration modes to be used for frequency response analysis Implemented keyword FREQUENCY_DOMAIN_PATH to define the path of binary databases containing mode information used in restarting frequency domain analysis e g frf ssd random vibration INITIAL Compute normal component of impulse for oblique plates in INITIAL_MINE_IMPULSE The feature is no longer limited to horizontal plates Disable license security for INITIAL_IMPULSE_MINE The feature is no longer restricted Fix a bug of INITIAL_STRESS_SOLID for 4 noded tetrahedral elements heme design Enabled hourglass type 7 to work well with INITIAL_FOAM_REFERENCE_GEOMETRY so that initial hourglass energy is properly calculated and foam will spring back to the initial geometry Load Accommodate erosion of thin shells in LOAD_BLAST_ENHANCHED LOAD_VOLUME_LOSS has been changed such that after the analysis time exceeds the last point on the curve of volume change fraction versus time the volume change is no longer enforced LOAD_BODY_POROUS new option AOPT adde
27. reated in the usual way CONTACT_ENTITY allow friction coefficient to be given by a coefficient vs time load curve input lt 0 gt absolute value is the load curve ID Also if the friction coefficient gt 1 0 the node sticks with no sliding at all Fix for MPP implementation of CONTACT_ORTHO_FRICTION Minor tweak to the way both MPP and SMP handle nodes sliding off the ends of beams in CONTACT_GUIDED_CABLE Fix MPP groupable tied CONTACT energy calculations The contact was working correctly but the energy calculation was incorrect since the changes of r71470 Frictional energy output in sleout DATABASE _SLEOUT supported for CONTACT _ MORTAR Tiebreak damage parameter output as contact gap in intfor file for CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_TIEBREAK_MORTAR OPTION 9 Added MPP support for CONTACT_2D_AUTOMATIC_SINGLE_SURFACE and CONTACT_2D_ AUTOMATIC _SURFACE_TO_SURFACE Database Eliminate automatic writing of a d3plot plot state after each 3D tetrahedral remeshing operation CONTROL_REMESHING to reduce volume of output Generate disbout output DATABASE_DISBOUT for MPP and SMP binout files Extend DATABASE_MASSOUT to include option to output mass information on rigid body nodes Bug fixes for D3PLOT Fixed bug in title of d3plot for double precision and LSTC_BINARY ieee32 format Fixed bug in d3plot if a solid part is removed Fixed bug in d3plot if any part is
28. removed for 10 noded tetrahedral element Fixed bug where hiding a part from d3plot removed its effect from the model A removed part was also removed from contact definition Fixed bug in binary file output d3plot d3drlf if the size of first geometry file is bigger than the defined size Fixed improper warning message if any part is removed from d3plot Added new keyword CHANGE_OUTPUT for full deck restart to override default behavior of overwriting existing ASCII files For small restart this option has no effect since all ASCII output is appended to the result of previous run already Added new option NEWLENGD to 2nd field of 3rd card of CONTROL_OUTPUT to write more detailed legend in ASCII output files At present only rcforc and jntforc are implemented Fixed bug in writing dyna inc INCLUDE_TRANSFORM for ELEMENT_DISCRETE ELEMENT_SOLID and ELEMENT_TSHELL Fixed bug in d3part files DATABASE _BINARY_D3PART triggered by MAT_ADD_EROSION SMP only Fixed bug in d3part output triggered by MAXINT lt 0 in DATABASE_EXTENT_D3PART Fixed bug in ANSYS output associated with adaptivity Fixed bad report of beam integration rules in d3hsp Fixed bug for encrypted data in adativity run if KEYWORD line exists in the include files Fixed bug in intfor database DATABASE_BINARY_INTFOR if geometric CONTACT_ENTITY exists Fixed bug in small restart whereby intfor database is overwritten Fixed bug in sta
29. tus out file if no sw2 or glstat DATABASE_GLSTAT is requested Fixed bug in Material Model Driver if number of load curveis is less than 9 Fixed bug whereby correct IRID of INTEGRATION_BEAM was not output to d3hsp Increased default binary file size scale factor x from 7 to 1024 That means the default binary file size will be 1 Gb for single version and 2 Gb for double version Add echo of new max frequency of element failure summaries flag FRFREQ in CONTROL_OUTPUT to d3hsp file Meme design Support LSDA binout output for new pllyout file DATABASE_PLLYOUT ELEMENT_BEAM_PULLEY in both SMP and MPP Element Allow degenerated hexahedrons pentas for cohesive solid elements ELFORM 19 20 that evolve from an extrusion of triangular shells The input of nodes on the element cards for such a pentahedron is given by N1 N2 N3 N3 N4 N5 N6 N6 Fixed error in reading ELEMENT_SHELL_COMPOSITE Fixed bug in SECTION_SHELL for seatbelt where SECID was input as a label Add new option to activate drilling constraint force for shells in explicit calculations This can be defined by parameters DRCPSID part set and DRCPRM scaling factor on CONTROL_SHELL Add SMP ASCII database pllyout DATABASE_PLLYOUT for ELEMENT_BEAM_PULLEY FREQUENCY _DOMAIN FREQUENCY_DOMAIN_ACOUSTIC_BEM Added an option to output real part of acoustic pressure in time domain Enabled BEM acoustic computation followi
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