Three-dimensional finite element analysis using crystal plasticity for a parameter study of microstructurally small fatigue crack growth in a AA7075 aluminum alloy.pdf

《Three-dimensional finite element analysis using crystal plasticity for a parameter study of microstructurally small fatigue crack growth in a AA7075 aluminum alloy.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、InternationalJournalofFatigue31(2009)651–658ContentslistsavailableatScienceDirectInternationalJournalofFatiguejournalhomepage:www.elsevier.com/locate/ijfatigueThree-dimensionalfiniteelementanalysisusingcrystalplasticityforaparameterstudyofmicrostructurallysmallfatiguecrackgrowthinaAA7075

2、aluminumalloyab,*a,bccL.Wang,S.R.Daniewicz,M.F.Horstemeyer,S.Sintay,A.D.RollettaCenterforAdvancedVehicularSystems,MississippiStateUniversity,P.O.Box5405,MississippiState,MS39762,USAbDepartmentofMechanicalEngineering,MississippiStateUniversity,P.O.BoxME,MississippiState,MS39762,USAcDepar

3、tmentofMaterialsScienceandEngineering,CarnegieMellonUniversity,Pittsburgh,PA15213,USAarticleinfoabstractArticlehistory:Three-dimensionalfiniteelementanalysisusingacrystalplasticityconstitutivetheorywasperformedtoReceived27August2007understandandquantifyvariousparametriceffectsonmicrostru

4、cturallysmallfatiguecrackgrowthinaReceivedinrevisedform25February2008AA7075aluminumalloy.Plasticity-inducedcrackopeningstresses(So/Smax)werecomputed,andfromAccepted16March2008theseresultsthecrackpropagationlifeNwasobtained.Adesignofexperiments(DOE)techniquewasAvailableonline29March2008u

5、sedtostudytheinfluencesofsevenparameters(maximumload,loadratio,particlemodulus,thenum-berofinitiallyactiveslipsystems,misorientationangle,particleaspectratio,andthenormalizedparticleKeywords:size)onfatiguecrackgrowth.ThesimulationsclearlyshowedthattheloadratioisthemostinfluentialMicrostru

6、cturallysmallfatiguecrackparameteroncrackgrowth.ThenextmostinfluentialparametersaremaximumloadandthenumberofgrowthCrystalplasticityinitiallyactiveslipsystems.Theparticlemodulus,misorientationangle,particleaspectratio,andthenor-Finiteelementanalysismalizedparticlesizeshowedlessinfluenceonc

7、rackgrowth.AnotherimportantdiscoveryinthisstudyDesignofexperimentsrevealedthattheparticlesweremoreimportantthanthegrainboundariesforinducingresistanceformicrostructurallysmallfatiguecrackgrowth.Ó2008ElsevierLtd.Allrightsreserved.1.Introductionmisorientationatthegrainboundary,th