abaqus finite element analysis of cyclic loading on a ：在循环加载abaqus有限元分析

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1、AccuracyofFullyElasticvs.Elastic-PlasticFiniteElementAnalysisBy:NicholasSzwajaMay25,2012MastersofEngineeringProjectProposalSubmittedtotheGraduateFacultyofRensselaerPolytechnicInstitutetoFulfilltheRequirementfortheDegreeofMastersofEngineering,MechanicalEngineeringAbstractTheobjectiveoft

2、hismasterofengineeringfinalprojectistoinvestigateandanalyzetheaccuracyofFiniteElementAnalysis(FEA)whenitisusedtocomparefullyelasticandelastic-plasticdeformationinHighStrengthSteel(HSS).HSS,likemanymetals,displaysalinearrelationshipbetweenstressandstrainuntilayieldpointisreached[1].Atth

3、eyieldpoint,ifforceisstillapplied,thematerialwillplasticallydeformandwillnotregeneratetoitsoriginalshape[2].Intheplasticrange,therelationshipbetweenstressoverstrainisnolongerlinear[2];asaresult,asmoreforceisappliedtothematerial,thevariableofstrainincreasesinlargerincrementswithrespectt

4、ostressuntilthematerialfractures[2].Elasticand/orplasticmaterialpropertiescanbeusedwhenperformingFEA.Plasticityisprimarilyanalyzedinplasticsandcertaincompositesbecauseoftheirlowmodulusofelasticity[3]orforgings.InHSS,FEAanalysiscanbeperformedusingfullyelasticmaterialproperties,howeverth

5、ismaynotbethebestanalysistoperform.WhenusingHSStodesignacomponent,oncethematerialgoesbeyonditsyieldpoint,permanentdeformationwilloccurwhich,forastructuraldesigntypicallyresultsinfailureofthecomponent.TocaptureplasticdeformationinFEA,tabular/experimentaldataofyieldstressandstraininthepl

6、asticrangeisrequiredtoensurethematerialcanbedeformedpasttheyieldpointandpermanentdeformationcanbeaccuratelyanalyzed.ThetabulardataisfromDataPointLabs,IthacaNY.Thisstudywillperformacomparisonstudytodeterminetheaccuracyoffullyelasticversuselastic-plasticanalysisinFEAofHSSintensionandcomp

7、ression.ThisanalysiswillincludeaFEAtensile/compressiontestanalysisofatestspecimenfromASMEE8usingfullyelasticmaterialpropertiesandcomparingtheresultstoelastic-plasticdeformationofHSS.IntroductionandBackgroundTensiletestareperformedtodetermine/validatetheloadcapacityofamaterial[4].Thet