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PythonScriptinginABAQUS(1).doc

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PythonScriptinginABAQUS KevinMaxwell TexasA&MUniversity August30,2006 Introduction ABAQUSCAEprovidesagraphicaluserinterfacethatallowstheusertocreatefiniteelementmodelsthatcanthenbeanalyzedinABAQUSStandard.ForeveryfeatureinCAE,thereisacorrespondingPythonscriptcommandthattheprogramuseswhencreatingthemodel.Ifthelanguageisunderstoodwellenough,anentiremodelcanbecreatedsimplybyrunningascriptfile. Whileonecouldwriteanentirescriptfromscratch,ABAQUSprovidesseveraleasiermethodsthatautogeneratePythoncommands.WhenamodeliscreatedinCAE,twofilesareautomaticallycreatedintheworkdirectory.ThereplayfilerecordseveryactionthatisperformedinCAEincludingcamerazoom/panningcommandsandalsoanymistakesthatweremadeandthencorrected.Thisfilecanberunto“replay”alltheworkthathasbeendoneonthemodel.Therecoverfilerecordsonlytheminimumnecessarycommandstorecreatethemodel.IfanerroroccursandCAEcloseswithoutsaving,therecoverfilecanberuntorecreatethemodel.Whenamodelissaved,CAEusestherecoverfiletowriteajournalfile.Thejournalfileisacomprehensivescriptthatshowsallworksavedonthemodel.Notethattherecoverfileisdeletedwheneverthemodelissavedandallofitscommandsaretransferredtothejournalfile.TherecoverandjournalfilesprovideaneasyalternativetowritingPythonscriptsfromscratch.OnecansimplydefineamodelinCAEandthensavethePythoncommandsfromtherecoverorjournalfilesasaseparatescriptfile. ThereareseveralvaluablesourcesofinformationpertainingtoscriptinginABAQUS.TheABAQUSScriptingUser’sManualandABAQUSScriptingReferenceManualareinvaluableresourcesthatareincludedintheABAQUSdocumentation.Theuser’smanualgivesanoverviewtoscriptingwhilethereferencemanualprovidesin-depthcoverageofeveryscriptingcommandusedinABAQUS.AnothersourceofinformationcanbefoundatHYPERLINK"http://www.python.org"http://www.python.org.ThiswebsitecontainsnumerousresourcesdealingwiththePythonlanguageingeneral. Example Toillustratetheprocedureforauto-generatingPythonscripts,thecruciformspecimenusedforinterfacialnormalstrengthtestingwillbemodeled.Thisspecimenisshow