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ME 455/555 Intro to Finite Element Analysis Fall 2011 Abaqus/CAE Truss tutorial

2011 Hormoz Zareh & Jenna Bell 1 Portland State University, Mechanical Engineering

Abaqus/CAE Truss Tutorial (Version 6.11)

ProblemDescription:Given the truss structure shown below with pinned supports at the wall and 1kN applied load; solve for

displacements of the free node and the reaction forces of the truss structure. The truss material is steel

with E = 210 GPa and =0.25.

1000 mm2

1250 mm25

00mm

750 mm

1 kN

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ME 455/555 Intro to Finite Element Analysis Fall 2011 Abaqus/CAE Truss tutorial

2011 Hormoz Zareh & Jenna Bell 2 Portland State University, Mechanical Engineering

AnalysisSteps1. StartAbaqusandchoosetocreateanewmodeldatabase2. InthemodeltreedoubleclickonthePartsnode(orrightclickonpartsandselectCreate)

3. IntheCreatePartdialogbox(shownabove)namethepartanda. Select2DPlanarb. SelectDeformablec. SelectWired. Setapproximatesize=1e. ClickContinue

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ME 455/555 Intro to Finite Element Analysis Fall 2011 Abaqus/CAE Truss tutorial

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4.Createthegeometryshownbelow(notdiscussedhere)

5. DoubleclickontheMaterialsnodeinthemodeltree

a. Namethenewmaterialandgiveitadescriptionb. ClickontheMechanicaltabElasticityElastic

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ME 455/555 Intro to Finite Element Analysis Fall 2011 Abaqus/CAE Truss tutorial

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c. DefineYoungsModulusandPoissonsRatio(usebaseSIunits)i. WARNING: TherearenopredefinedsystemofunitswithinAbaqus,sotheuseris

responsibleforensuringthatthecorrectvaluesarespecifiedd. ClickOK

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ME 455/555 Intro to Finite Element Analysis Fall 2011 Abaqus/CAE Truss tutorial

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6. DoubleclickontheSectionsnodeinthemodeltreea. NamethesectionHorizontalBarandselectBeamforboththecategoryandTrussforthe

type

b. ClickContinuec. Selectthematerialcreatedabove(Steel)d. Setcrosssectionalarea=0.001(baseSIunits,m2)e. ClickOK

f. RepeatfortheAngledBari. Crosssectionalarea=0.00125

7. ExpandthePartsnodeinthemodeltree,expandthenodeofthepartjustcreated,anddoubleclickonSectionAssignments

a. Selectthehorizontalportionofthegeometryintheviewportb. ClickDonec. SelecttheHorizontalBarsectioncreatedaboved. ClickOK

e. Repeatfortheangledportionofthegeometry

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ME 455/555 Intro to Finite Element Analysis Fall 2011 Abaqus/CAE Truss tutorial

2011 Hormoz Zareh & Jenna Bell 6 Portland State University, Mechanical Engineering

8. ExpandtheAssemblynodeinthemodeltreeandthendoubleclickonInstancesa. SelectDependentfortheinstancetypeb. ClickOK

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ME 455/555 Intro to Finite Element Analysis Fall 2011 Abaqus/CAE Truss tutorial

2011 Hormoz Zareh & Jenna Bell 7 Portland State University, Mechanical Engineering

9.DoubleclickontheStepsnodeinthemodeltreea. Namethestep,settheproceduretoGeneral,andselectStatic,Generalb. ClickContinuec. Givethestepadescriptiond. ClickOK

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10.ExpandtheFieldOutputRequestsnodeinthemodeltree,andthendoubleclickonFOutput1(FOutput1wasautomaticallygeneratedwhencreatingthestep)

a. UncheckthevariablesStrainsandContactb. ClickOK

11.ExpandtheHistoryOutputRequestsnodeinthemodeltree,andthenrightclickonHOutput1(HOutput1wasautomaticallygeneratedwhencreatingthestep)andselectDelete

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ME 455/555 Intro to Finite Element Analysis Fall 2011 Abaqus/CAE Truss tutorial

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12.DoubleclickontheBCsnodeinthemodeltreea. NametheboundaryconditionedPinnedandselectDisplacement/Rotationforthetypeb. ClickContinuec. Selecttheendpointsontheleft(shiftselect)andpressDoneinthepromptaread. ChecktheU1andU2displacementsandsetthemto0e. ClickOK

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ME 455/555 Intro to Finite Element Analysis Fall 2011 Abaqus/CAE Truss tutorial

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13.DoubleclickontheLoadsnodeinthemodeltreea. NametheloadPointLoadandselectConcentratedforceasthetypeb. ClickContinuec. SelectthevertexontherightandpressDoneinthepromptaread. SpecifyCF2 = 1000e. ClickOK

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14. InthemodeltreedoubleclickonMeshfortheTrusspart,andinthetoolboxareaclickontheAssignElementTypeicon

a. SelectStandardforelementtypeb. SelectLinearforgeometricorderc. SelectTrussforfamilyd. Notethatthenameoftheelement(B21)anditsdescriptionaregivenbelowtheelement

controls

e. ClickOK

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15. InthetoolboxareaclickontheSeedEdgesicona. Selecttheentiregeometryb. ChoosemethodasBynumberc. Definethenumberofelementsalongtheedgesas1d. ClickOK

16. InthetoolboxareaclickontheMeshParticona. ClickYesinthepromptarea

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18. InthemodeltreedoubleclickontheJobnodea. NamethejobTrussb. ClickContinuec. Givethejobadescriptiond. ClickOK

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ME 455/555 Intro to Finite Element Analysis Fall 2011 Abaqus/CAE Truss tutorial

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19. Inthemodeltreerightclickonthejobjustcreated(Truss)andselectSubmita. WhileAbaqusissolvingtheproblemrightclickonthejobsubmitted(Truss),andselect

Monitor

b. IntheMonitorwindowcheckthattherearenoerrorsorwarningsi. Ifthereareerrors,investigatethecause(s)beforeresolvingii. Iftherearewarnings,determineifthewarningsarerelevant,somewarningscanbe

safelyignored

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23. InthetoolboxareaclickontheCommonPlotOptionsicona. NotethattheDeformationScaleFactorcanbesetontheBasictabb. OntheLabelstabcheckShowelementlabels,Shownodelabels,andShownode

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25.Tochangethedisplayedoutput,either:a. Changethefieldoutputusingthetoolbar

optionshortcut

b. Usethemenubari. ClickonResultsField

Output

ii. SelectU Spatialdisplacementatnodes

iii. Component=U2iv. ClickOK

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26.Tocreateatextfilecontainingthestresses,verticaldisplacements,andreactionforces(includingthetotal),inthe

menubarclickonReportFieldOutput

a. Fortheoutputvariableselect(Von)Misesb. OntheSetuptabspecifythenameandthelocationfor

thetextfile

c. UnchecktheColumntotalsoptiond. ClickApply

e. BackontheVariabletabchangethepositiontoUniqueNodalf. Uncheckthestressvariable,andselecttheU2spatialdisplacementg. ClickApply

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h. OntheVariabletab,uncheckSpatialdisplacementandselecttheRF2reactionforcei. OntheSetuptab,checktheColumntotalsoptionj. ClickOK

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27.Openthe.rptfilewithanytexteditora. Onethingtocheckisthatthetotaldownwardreactionforceisequaltotheappliedload

(1,000N)

b. EachtimeApplyispressedthe.rptfileisupdatedaslongastheAppendtofileoptionischeckedunderSetup