ABAQUS/CAE Tutorial: Analysis of an Aluminum Bracket
Contents
1. H Kim FEA Tutorial 6 Partition Edge Click the Partition Edge Enter Parameter button In order to get this button you need to click and hold over the line partitioning tools button note the small dark triangle in the lower right corner indicates that this is an expanding button ABAQUS CAE Version 6 4 4 Viewport 1 File Model Viewporn View Part shape Feature Tools Help You will be prompted to select an edge select the far right hand edge of the bracket Click Done In the Prompt Area enter in value of 0 25 for the Normalized edge parameter Click the Create Partition button to finish You will see a large dot one fourth of the way up the edge of the bracket This partitioned edge will be used later for applying a uniform load Saving and Defining Material Properties Save your work inthe Menu ER Bar click File Save As Eo ieee Ges Lal Dew e Under Selection enter a Mode Y name at the end of the path e g bracket Click OK From now on you can just click the blue floppy disk icon in H Kim FEA Tutorial 7 the Tool Bar Save often Change Modules In the Module drop down box beneath the Tool Bar select Property Click Create Material Button enter a name e g Aluminum select Mechanical gt Elasticity gt Elastic enter 10e6 for Young s Modulus 0 3 for Poisson s Ratio click OK If you want to modify th2. Discrete rigid None available KYE F Under Modeling Space choose The model Model 1 has Al _ Analytical rigid r Base Feature 2D Planar p A C Planar shell Base Feature Shell yil ko _ Planar wire Approximate size 20 li Ea Approximate size Continue Cancel click Continue Part module loaded I 3 H Kim FEA Tutorial 4 Sketch Part The window will change to that shown at right Note the buttons pointed out fj apaqus cac version 62 000 File Model Canvas View Edit Add Help Buttons with a dark triangle will provide more button choices when clicked and held Try it DSHS te QIRA eA PAW Ww Module Part Model Model 1 y Pat 0 Float your mouse pointer over buttons it will give a pop up description E viewport 1 s 4 00 Pret a 4 00 Context Sensitive Help is available Click the help button then the item you want more info on Click Create Lines button Note it is highlighted when active In prompt area enter in the coordinates 1 O 0 lt enter gt 2 8 0 lt enter gt it is ok if point is be out of view 3 8 12 lt enter gt 4 5 12 lt enter gt 5 5 3 lt enter gt 6 0 3 lt enter gt I click on point 1 box will appear on 1t Finished product will be yellow outline of the bracket al x Pick a start point for the line or enter X Y Click Auto Fit View butt
3. Model Database fhome roger d hyonny FEA 5 5 8 brac ket c Click the Plot File Model Canvas View Result Plot Animate Report Options Tools Help Contours DEKA PERNA BA GAGA button Module Visualization Yj ODB FEA 558 bracket odb A colorful plot of I Viewport 1 ODB Jhomelrogeridinyonny FEATSS0lbracket odi Von Mises stresses appears Color control can be adjusted by clicking the Contour Options button and adjusting parameters To select the scalar field quantity plotted in the Menu Bar select Result Field Output then choose the stress component you wish to plot e g S11 or UL Click OK Strains Spatial Displacements etc can be selected through Field Output s 154e 01 ABAQUS Standard 6 2 1 loading Step Time Mon Sep 0 Incremen Primary Vi 1 000 Plot Mode Contour ODB Frame Hed al Ip Leal Contour Opt Number of steps 1 I O O O Field Output OOO OO O OO O OO Step Frame Step 1 Step 1 Frame 6 Step Frame Primary Variable Deformed Variable Result Options r Output Variable List only variables with results ai istecrsuse y Description Active yield flag at intec Point loads at nodes E Strain components at inte Plastic strain components Equivalent plastic strain Magnitude of plastic straj Reaction force at nodes Stress components at inteq U Spatial displacement at ndi Invariant
4. Result b for visualizing results Under Status 1t will read l Sumbitted 2 Running 3 Completed Click Results The Visualization module will run and the part in outline will be shown It should look like the image to the right Model Database home roger d hyonny FEA 55 8 bracket c H Kim FEA Tutorial 1 6 Help ABAQUS CAE Version 6 2 001 File Model Canvas View Job N2ewS eQckus bal gogo Module Joo Model model 1 Step step 1 xwj Model Model 1 Viewport 1 Step Step 1 Write Input Job Manager Write Input Submit Monitor Results Yi Create Edit Copy Renarne Delete Dismiss ABAQUS CAE Version 6 2 001 Model Database home roger d hyon ny FEA 558 bracket c File Model Canvas View Result Plot Animate Report Options Tools DAKA Ann E Eal PAA olm Module visualization W ODB FEA 558 bracket odb ODB home roger d Ahyonny FEAS56 bracket odb Model 1 Full Analysis None Help viewport 1 The job bracket has been created l 2 bracket analysis f 1 ODB bracket odb Step Step 1 apply loading ABAQUS Standard 6 2 1 Mon Sep 09 21 Increment 6 Step Time 1 000 Plot Mode Fast ODE Frame bed al Ip Leal Number of steps 1 i Results a Visualization ABAQUS CAE Version 6 2 001 17 H Kim FEA Tutorial
5. Static General Basic Incrementation Other Type Automatic _ Fixed Maximum number of increments 100 Initial Minimum Increment size wal e 05 4 Maximum Load e Change Modules Select the Load module e Click the Create Load button the Create Load window pops up enter a Name e g Load 1 is the default name be sure Step 1 or what name you have given it is selected in the Step drop down box be sure Mechanical is selected in Category under Type for selected step choose Pressure click Continue Upon prompting to Select surfaces mouse pointer click on the lower portion of the right edge of the bracket the region we partitioned previously It will highlight red click Done in the Edit Load window that pops up be sure to have Distribution set to Uniform enter value of 1000 in Magnitude and be sure that Ramp is selected under Amplitude This is a 1000 psi traction click OK You should get the image shown to the right If your arrows are in the wrong direction you need to go back and be sure to specify a negative pressure ABAQUS CAE Version 6 2 001 File Model Canvas View Load BC Field Feature Tools Model Database home roger d hyonny FEA 5 5 8 bracket c Help DEHAP AARNA EA gogl olw Module Load y Model wode1 1 y Step step 1 y Viewport 1 Model Model 1 Step Step 1 Step step 1 y Procedure St
6. inteq Plastic strain components Equivalent plastic strain Magnitude of plastic stra Reaction force at nodes Stress components at inteq Spatial displacement at ndi Plot Mode Contour ODB Frame Ha al Ip Leal poe of steps 1 In Plane Principal in In Plane Principal Out of Plane Principal Max Principal Mid Principal
7. H Kim PEA Tatonal 1 ABAQUS CAE Tutorial Analysis of an Aluminum Bracket Hyonny Kim last updated August 2004 UY In this tutorial you ll learn how to 1 Sketch 2D geometry amp define part Define material properties Apply loads and boundary conditions Mesh Run analysis oy oe ge ae ae iew results View results 50 Ib in Aluminum Plate lt Thickness 0 05 ae H Kim PEA Tuona 2 Helpful Tips Before Getting Started Use Exceed 9 0 or equivalent PC terminal software HELP Online help manuals abaqus_aae doc amp there is a book for CAE ABAQUS CAE User s Manual Context sensitive help is also available within CAE CAE creates the inp file which you can edit and run by the command line or you can submit jobs from within CAE Other files are cae CAE model file odb dat log msg and sta The dat is the text output file that will contain results The odb file is the binary output file that will be read during post processing to view graphical results The log file keeps a text record of all processes and is useful for checking the status of the analysis The msg lists the progress of the analysis as well as provides some messages about why an analysis might have crashed this information is often within the dat file as well The sta file is a summary of the information contained in the msg file and is useful for monitoring the status of long running jobs during their computa
8. atic General r Type for selected step r Category Createtoad oad 1 Concentrated force Moment Mechanical kas kat Pipe pressure Body force Line load Gravity is Rts tet hs Bolt load woes Se Generalized plane strain Rotational body force Type Step Region H Kim FEA Tutorial EditLoad O Name Load 1 Pressure Step 1 Static General Picked 11 Continue Cancel Load module loaded I ABAQUS CAE Version 6 2 001 Distribution Uniform y Amplitude Ramp y Cancel Model Database home roger d File Model Canvas View Load BC Field Feature Tools i hyonny FEA 55 8 bracket c Help DEKA te AIRAN BEA APPO Module Load y Model mode1 1 y Step step 1 y viewport 1 mE m aE m Eriky JF _ Er lt ee Calas Model Model 1 Step Step 1 Load module loaded Boundary Conditions Click the Create Boundary Condition button the Create Boundary Condition window pops up enter a name e g fixed edge under Category be sure that Mechanical is selected under Type for selected step choose Displacement Rotation click Continue upon prompt to select regions mouse pointer click on the upp
9. e material click the Material Manager button BN Bla to the right of Create Material select the material by name and click Edit or click Dismiss to leave Property module loaded I without making any changes MMMM Part bracket Name Aluminum Material Options General Mechanical Thermal Other Delete r Elastic Type Isotropic Suboptions Use temperature dependent data Number of field variables 0 Moduli time scale for viscoelasticity Long term Data ww Click mouse button 3 for table options Modulus Ratio 1e 07 9 3 Young s Poisson s Assign Properties to Regions of Model 2 Click Create Section Button enter a name e g plate choose Solid and Homogeneous click Continue select the material Aluminum or what ever you named it there should be only one to choose from in the drop down box enter Plane stress strain thickness 0 05 Click OK 3 Click Assign Section Button you will be prompted to select a region Click on the part Click the Done button in the Prompt Area at the bottom of the screen The Assign Section window will pop up Select the Section Name you wish to assign to this region there should be only one which you ve previously named e g plate click OK Create Section Nane riste r Category r T
10. eds have been assigned Lo Le Create Job SAVE YOUR WORK e Change Modules Select the Job module e Click Create Job button e Enter a name e g bracket e Click Continue e In the Edit Job window that pops up enter a Description e g bracket analysis e Check that Full analysis Background and Immediately are selected e Click OK ABAQUS CAE Version 6 2 001 File Model Canvas View Job DSHS PERSANA EA Gd we H Kim FEA Tutorial 1 5 Model Database fhome roger d hyon ny FEA 55 8 bracket c Help Module Job y Model Model 1 Y Step Step 1 y Viewport 1 Create Job Continue Cancel rm job bracket has been created Model Model 1 Step Step 1 Edit Job Name bracket Model Model 1 Description bracket analysis Submission General Hardware Solver Job Type Full analysis _ Data check J Continue analysis D Recover Explicit _ Restart Run Mode Background _ Queue Submit Time C Immediately _ Wait Zz hrs ZZ min At f Submit Job Click Job Manager button In Job Manger window pops up check that your job 1s selected then click Submit To run your model in Unix Server click Write Input It takes few seconds to write job name inp Then 1 Save you job 2 Close ABAQUS CAE 3 Type abaqus job job name 4 Enter 5 Then go to slide 18
11. er left vertical edge of the bracket It will highlight red click Done Edit Boundary Condition window pops up be sure Uniform is selected in Distribution check mark click boxes for ul and u2 and leave the default values of 0 click OK You should get the image shown to the right Create Boundary Condition Name fized edge Step Step 1 y Procedure Static General Category Type for selected step Mechanical Symmetry Antisymmetry Encastre Other Displacement Rotation Velocity Angular velocity Continue Cancel HA BAQUS CAE Version 6 2 001 File Model Canvas View Load BC Field Feature Tools H Kim FEA Tutorial 12 Name fixed edge Type Displacement Rotation step Step 1 Static General Region Picked CSYS Global Edit Distribution Uniform y Wf U1 0 _ URS i radians Amplitude Ramp x Model Database home roger d hyonny FEA 55 8 bracket c Help DEKATE ARNA Eal gog olw Module Load y Model Model 1 y Step Step 1 y me viewport 1 Model Model 1 Step Step 1 Load module loaded haa L a Seed Mesh Change Modules Select the Mesh module Click the Seed Part Instance button This is an expandable button There are many other functions within this button that are useful for controlling mesh size Inthe Prompt Area e
12. nter a Global element size value of 0 5 Hit enter and you will see circular symbols indicating nodal locations along the part edges Click the Assign Element Type button the Element Type window pops up choose Standard in Element Library Plane Stress in Family Linear in Geometric Order within the Quad tab choose Reduced Integration in Element Controls Leave everything else at default values the text in the lower box should indicate a CPS4R element identification This is a 4 node reduced integration quadrilateral element click OK ABAQUS CAE Version 6 2 001 File Model Canvas View Seed Mesh Feature DKS QakKt amp Model Database home roger d hyonny FEA 5 5 8 bracket c FEA Tutorial 13 Tools Help BA HMM D Module Mesh y Model wode1 1 y Step step 1 y 0 Viewport 1 ia Ki R x Global element size approximate 0 5 Global seeds have been assigned Ej i BHO HOH Geometric Order Plane Strain a Linear Quadratic Plane Stress Model Model 1 Step Step 1 w M M e e w of w M M w w F ga rer aS Se a Sr a E Element Library Family Standard Explicit Heat Transfer Piezoelectric Huag Tri Element Controls M Reduced integration l Incompatible modes Hourglass stifness Use default Specify o Second
13. on to re scale image The other buttons adjacent to this one will adjust A panning rotation and zoom Try them out Dynamic viewing with mouse buttons by holding CTRL ALT on right side of keyboard Try it Click Create Circle button Enter 6 5 1 5 for center and 7 25 1 5 for perimeter point Click Create Fillet button go to next page H Kim FEA Tutorial 5 Sketch Part contd 3 cont d enter 1 0 for fillet radius in the Prompt Area hit enter then Mouse click on inner two lines when prompted The Create Fillet button should still be highlighted Click this again to get the screen shown below left Click the Done button in the Prompt Area at the bottom of the screen e You now are returned to the Part Module screen This should look like the screen below right Note different tool buttons shown in the Toolbox Area ja ABAQUS CAE Version 62 00 File Model Canvas View Edit Add E no KA RBAQUS CAE Version 6 2 001 ee i KY m A Lk E 1 E A a g o R File Model Canvas View Part Shape Feature Tools Help Module Part y Model Model 1 y Part y D Ey Sr my Pa tl E Z A p 7 B Gi R Module Part Model Model 1 y Part bracket y Apply Fillet Using These Lines X Sketch the section for the planar shell Done Part module loaded Part module loaded I Ej
14. order accuracy C Yes Mo Distortion control C Yes No Cengi ratia for Hourglass control Enhanced Relax stiffness Stiffness Viscous Combined SUieee viscole WE TOT feelin fos Displacement hourglass scaling factor i CPS4R A 4 node bilinear plane stress quadrilateral reduced integration hourglass control Hote To select an element shape for meshing select Mesh gt Caontrols from the main menu bar Defaults Cancel Mesh Click Mesh Part Instance button Note this button has many other functions within it click hold mouse button down on this button such as deleting mesh and meshing regions of a part Click Yes in the Prompt Area Your mesh should look like the image shown to the right ABAQUS CAE Version 6 2 001 Model Database home roger d hyonny FEA 558 bracket c Global seeds have been assigned H Kim FEA Tutorial 14 File Model Canvas View Seed Mesh Feature Tools DAKAL KARN EA gag Ow Help Module mesh Model model 1 Step step 1 xwj ji Bafi ia L A fa Eea Mesh Part Instance Bay 5S T wol A pj AJ File Model Canvas View Seed Mesh Feature Tools NGBS e Qikuse EA gool olw Module mesh y Model mode1 1 y Step step 1 y X OK to mesh the part instance No PAREL iW ea Gila ai OE Us Us x ru ea Calas Global se
15. r Component Mises Max In Plane Principal S22 Min In Plane Principal 33 Out of Plane Principal 12 Max Principal Mid Principal H Kim FEA Tutorial 18 Results b After Run Model on Unix Server Run ABAQUS CAE or ABAQUS VIEWER Open job name odb Click the Plot Contours button A colorful plot of Von Mises stresses appears Color control can be adjusted by clicking the Contour Options button and adjusting parameters To select the scalar field quantity plotted in the Menu Bar select Result Field Output then choose the stress component you wish to plot e g S11 or U1 Click OK Strains Spatial Displacements etc can be selected through Field Output ABAQUS CAE Version 6 2 001 Model Database home roger d hyon ny FEA 558 bracket c File Model Canvas View Result Plot Animate Report Options Tools Help NGOS PEANN A BA IIAI Module visualization W ODB FEA SS8 bracket odb Feld output Step Frame Step 1 Step 1 Frame 6 Step Frame Primary Variable Deformed Variable Result Options Output Variable bracket analysis List only variables with results ai istecrsuse 9 ODB bracket odb ABAQUS Standard 6 2 Step 1 apply loading Increment 6 Step Time 1 000 Primary Var 5S Mises Description Active yield flag at intec Point loads at nodes Strain components at
16. tion MOUSE Use of the Mouse button 1 left is select button 2 right gives menu button 3 middle if available is enter or done multiple items can be selected by dragging a window or holding the SHIFT key while picking items can be de selected by holding the CTRL key H Kim FEA Tutorial 3 ABAQUS CAE Getting Started Create Part To run ABAQUS CAE first go seo a 8 ABAQUS CAE Version 6 2 001 to the directory you wish your HEEN Ie ae Help files to be located then type Rees e Qik BA Nh abaqus_adae cae Or Viewport 1 usr site aae bin abaqus_aae cae click Create Model Database In the Module dropdown box select Part this takes about 30 seconds for the program to initialize Note the locations of Tool Bar Menu Bar Toolbox Area Prompt Area These will be referred to repeatedly in the future In the Toolbox Area click Create Part button The Create ABAQUS CAE Version 6 2 001 OOO O l File Model Canvas View Part Shape Feature Tools Help JA DAKSA Q4hh BA 7 Module Part Model Model 1 Part 6 L waT n a Ve Bjr Name bracket ar Pa B Modeling Space _ 3D 2D Planar _ Axisymmetric iis Ga US Part window will pop up Type p Options C Deformable Enter in name 8 bracket p _
17. ule loaded Step Change Modules Select the Step module Click the Create Step button Create Step window pops up enter a name use the default name Step be sure Procedure type is set to General and Static General is highlighted in the list Click Continue Edit Step window pops up with the Basic tab active enter in a Description e g apply loading Click the Incrementation tab under Increment Size enter value of 0 1 for Initial Leave the rest the same Full load corresponds to an Increment value of 1 when Time Period is set to 1 under the Basic tab Setting Initial to 0 1 forces ABAQUS to start the analysis by applying 1 10 of the full load This can also be left to default 1 value and the software will auto select click OK H Kim FEA Tutorial 10 Viewport 1 1 Model M Model 1 Step 1 Step initial Insert new step after Procedure type General l Dynamic Temp disp Explicit Geostatic Heat transfer Mass diffusion Soils Static We Visco Step module loaded Basic Incrementation Other Description apply loading Time period 1 Rican s Off This setting affects subsequent steps and controls the g On inclusion of the nonlinear effects of large displacements Use stabilization with Continue Cancel _ Include adiabatic heating effects Name Step 1 Type
18. ype C Solid _ Shell _ Beam HO mogeneous Ed l t Sec ti on Generalized plane strain Name plate Type Solid Homogeneous _ Other Material Aluminum y Plane stress strain thickness o5 Continue a H Kim FEA Tutorial 8 Viewport 1 Model Mode ASSignSection Solid Homogeneous Cancel Select the regions to be assigned a section a Done Property module loaded i H Instance Part Change Modules In the Module drop down box beneath the Tool Bar select the Assembly note the Canvas main working graphical window will be blank Click the Instance Part button The Create Instance window will Pop up Select the part you wish to instance e g the part we named bracket previously A red outline of the bracket will show Click OK H Kim FEA Tutorial 9 File Model Canvas View De wl te Modue v Model Database home roger d hyonny FEA 5 5 8 bracket c File Model Canvas View Assembly Instance Constraint Feature Tools Help Sketch NEHAP AARNA EA Agl OIN DE Module Assembly Y Model mode1 1 xj Step initiat wj EE ON Visualization Viewport 1 Model Model 1 Step Initial Create Instance Parts _ Auto offset from other instances j Xx Select the parts to instance from the dialog Assembly mod
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