Nonlinear FEA of 3D truss of strains, damage and plasticity

最新空间桁架结构分析论文,考虑了大变形,大应变,材料损伤和材料弹塑性变形。

CommunicationsinNonlinearScience

andNumericalSimulation10(2005)

515–535

http://doc.xuehai.net/locate/cnsns

Acontributiontothenumericalnonlinearanalysisof

three-dimensionaltrusssystemsconsideringlarge

strains,damageandplasticity

LarissaDriemeier

a

ba,*,SergioP.BaronciniProenc lioAlvesßab,Marc a~oPaulo,DepartmentofMechatronicsandMechanicalSystemsEngineering,UniversityofSaS~aoPaulo,SP05508-900,BrazilDepartmentofStructuralEngineering,UniversityofS~aoPaulo,S~aoCarlos,SP13560-570,Brazil

Received19December2002;receivedinrevisedform19December2002;accepted8December2003

Availableonline12February2004

Abstract

Theobjectiveofthispaperistopresentindetailtheoreticalandnumericalaspectsofthebehaviorofspatialtrussesundergoinglargedisplacementsandstrains.Nonlinearmaterialbehavioristakenintoaccount,allowingforthedevelopmentof niteplasticstrainsanddamage.Boththeoreticalandalgorithmictangentmoduliarederivedanda niteelementapproachisusedtosolvethenonlinearboundaryvalueproblem.Keyexamplesarechosentoexplorethevariousfeaturesofthemodelandtohighlighttheinterplaybetweenplasticityanddamage.Ó2004ElsevierB.V.Allrightsreserved.

PACS:46.70.Hg

Keywords:Truss;Largestrains;Damage;Plasticity

1.Introduction

Manyrestrictionsareassumedinclassicallinearstructuralanalysis,suchas:thematerialobeysHookeÕsLaw;smallstrains;equilibriumisenforcedattheinitialcon gurationbyneglectinggeometricalchanges;boundaryconditionsarekeptconstant.However,inmanyapplicationsthematerialcanbeloadedwellbeyonditslinearlimit,requiringforamoresophisticatedanalysistoaddressfeatureslikeyielding,strainhardeningand/orsoftening,localizationandfailure.Inthis*Correspondingauthor.Tel.:+55-11-3091-5756;fax:+55-11-3091-5461.

E-mailaddress:driemeie@usp.br(L.Driemeier).

1007-5704/$-seefrontmatterÓ2004ElsevierB.V.Allrightsreserved.

doi:10.1016/http://doc.xuehai.netsns.2003.12.002

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