06_Pretensioning_Intro to OS for Nonlinear_v2017_r

OptiStructforNonlinearAnalysisChapter6:IntegratingPretensionandPreloadingIntoSolutionsTrainer’sName,Trainer’sJobTitleAltairEngineeringCity,Date©2017AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.2OptiStructforNonlinearAnalysis,Version2017Chapter6:IntegratingPretensionandPreloadingIntoSolutionsAgenda0.CourseAgendaandOverview1.IntroductiontoAltairandtheHyperWorksSuite2.IntroductiontoNonlinearSolutionsandMethods3.WorkingwithNonlinearMaterials4.SimulatingNonlinearGeometry5.SettingUpContact6.IntegratingPretensionandPreloadingIntoSolutions7.GasketModeling8.NonlinearOptimization9.BestPracticesforNonlinearModelingandSimulation©2017AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.3OptiStructforNonlinearAnalysis,Version2017Chapter6:IntegratingPretensionandPreloadingIntoSolutionsBoltPretensionBoltpretensioningisacommonanalysissetupwhichrequiresasubcasecontinuationandmayormaynotinvolvecontact•Inapretensionanalysis,thenutsonboltsare“tightened”,makingtheworkingpartofboltshorterbyDl•TheDliscomputedbasedonappliedforce,structuralcomplianceofthesystemandtheassembly•ForallanalysesinwhichthispretensionisappliedoTheDloftheboltsarelockedoTheanalysisresultsofthepretensionstep(includingsystemcomplianceunderthatloading)isusedasthestartingpointforapplicationofsubsequentloadsPretensionstepLoadingstep©2017AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.4OptiStructforNonlinearAnalysis,Version2017Chapter6:IntegratingPretensionandPreloadingIntoSolutionsNonlinearAnalysisBulkDataCards:PRETENSBasicParametersThePRETENScarddefinesa1Dor3DpretensionedboltsectionWhere:(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)PRETENSSIDEIDSURFIDNTYPG1/X1/CIDG2/X2G3/X3SPNTIDSIDUniquesectionidentificationnumberEIDElementidentificationnumberofabar,beamorrodelementfordefining1DpretensionedboltSURFIDIdentifierofSURFcardwhichdefinescuttingsectionof3DpretensionedboltNTYPTypeofdeterminationofnormaltothepretensionsectionG1,G2,G3Threegrididentifiersthatdefinetheplanewhereit'snormalisthedirectionoftheboltX1,X2,X3Coordinates,inbasicsystem,ofthevectorthatdefinesdirectionofpretensionCIDIdentifierofacoordinatesystemthatdefinesdirectionofpretensionSPNTIDSPOINTthatdefinestheDOFcontainingthepretensiondeformationandload©2017AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.5OptiStructforNonlinearAnalysis,Version2017Chapter6:IntegratingPretensionandPreloadingIntoSolutionsBoltPretensionManyboltsarerepresentedas1Dentitieswithpretensionappliedto1Dnon-rigidelements(rod,bar,beam)•Foreachbolt,a‘cut’orpretensionsectionisdefinedandsubjectthesectiontotensileloads•Thelengthofboltatpretensionsectionwillchangebyamountnecessarytocarryprescribedload,whileaccountingforthecomplianceofsystem•Inthenextsteps,theprescribedboltloadsarereplacedbyfixedDl•Therestofboltisfreetodeformunderassemblyloads©2017AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.6OptiStructforNonlinearAnalysis,Version2017Chapter6:IntegratingPretensionandPreloadingIntoSolutionsNonlinearAnalysisBulkDataCards:PTADJSTBasicParametersThePTADJSTcarddefinestheadjustment(shortening)onapretensionsectionWhere:(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)PTADJSTPSIDSIDADJPSIDPretensioningloadsetidentificationnumberSIDPretensionsectionidentificationnumberADJAdjustmentappliedonthissection(positivevaluemeansshortening)©2017AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.7OptiStructforNonlinearAnalysis,Version2017Chapter6:IntegratingPretensionandPreloadingIntoSolutionsNonlinearAnalysisBulkDataCards:PTADJS1BasicParametersThePTADJS1cardalternativelydefinestheadjustment(shortening)onapretensionsectionWhere:(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)PTADJS1PSIDADJSID1SID2SID3SID4SID5SID6SID7SID8SID9…PSIDPretensioningloadsetidentificationnumberADJAdjustmentappliedonthissection(positivevaluemeansshortening)SIDiPretensionsectionidentificationnumber©2017AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.8OptiStructforNonlinearAnalysis,Version2017Chapter6:IntegratingPretensionandPreloadingIntoSolutionsNonlinearAnalysisBulkDataCards:PTFORCEBasicParametersThePTFORCEcarddefinesthepretensioningforceonapretensionsectionWhere:(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)PTFORCEPSIDSIDFPSIDPretensioningloadsetidentificationnumberSIDPretensionsectionidentificationnumberFPretensioningforceappliedonthissection(Positivevaluecreatestension)©2017AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.9OptiStructforNonlinearAnalysis,Version2017Chapter6:IntegratingPretensionandPreloadingIntoSolutionsNonlinearAnalysisBulkDataCards:PTFORC1BasicParametersThePTFORC1cardalternativelydefinesthepretensioningforceonpretensionsectionsWhere:(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)PTFORC1PSIDFSID1SID2SID3SID4SID5SID6SID7SID8SID9…PSIDPretensioningloadsetidentificationnumberFPretensioningforceappliedonthissection(Positivevaluecreatestension)SIDiPretensionsectionidentificationnumber©2017AltairEngineering,Inc.ProprietaryandConfidential.Allrightsreserved.10OptiStructforNonlinearAnalysis,Version2017Chapter6:Int