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1、ComputationalMaterialsScience46(2009)672–676ContentslistsavailableatScienceDirectComputationalMaterialsSciencejournalhomepage:www.elsevier.com/locate/commatsciAsimpleelement-splittingmodeltosimulatethetensilefractureofbrittlematerialsanditsexperimentalverificationabc,*WangLaigui
2、,ZhaoNa,MaShaopengaDept.ofCivilEngineering,WuhanPolytechnicUniversity,Wuhan430023,ChinabSchoolofMechanicsandEngineering,LiaoningTechniqueUniversity,Fuxin123000,ChinacDept.ofMechanics,SchoolofAerospaceEngineering,BeijingInstituteofTechnology,Beijing100081,Chinaarticleinfoabstrac
3、tArticlehistory:Becauseofthelowtensilestrengthofbrittlematerials,thetensilefracturesimulationisofgreatimpor-Received15November2008tancetothenumericalstudyofthefailureprocedureofthesematerials.Asimpleelement-splittingReceivedinrevisedform26February2009modelisproposedinthispapert
4、osimulatethetensilefractureprocedurebasedonfiniteelementAccepted31March2009method(FEM).Asanapplicationofthismodel,thefractureprocedureofadoughnut-shapedspecimenAvailableonline7May2009issimulatedandthenumericalresultsarecomparedwiththedeformationfields’evolutionfromanexperimentona
5、granitespecimenwiththesamegeometryandsameloadingprocess.ResultsfromPACS:theexperimentverifiedthevalidationofthesimulationmodel.46.15.xÓ2009ElsevierB.V.Allrightsreserved.91.60.Ba62.20.mmKeywords:BrittlematerialTensilefractureElement-splittingDigitalspecklecorrelationmethod1.Intr
6、oductionconsidered.Theextendedfiniteelementmethod(XFEM)[5,6]isprovedtobeapowerfultoolforsimulationofthecrackpropaga-Thetensilestrengthofbrittlematerials,suchasrock,concrete,tion.While,whenconsideringofthesimulationofthemicro-ceramic,etc.,ismuchlowerthantheircompressionstrengthan
7、dcrackscoalescence[7],whichisimportanttotheinitializationofshearingstrength[1].Forexample,thetensilestrengthofgranitethefractureforheterogenousbrittlematerials,theelement-split-isabout1/15ofitscompressionstrength[2].Thus,tensilefractureting[8,9]techniqueismucheasiertorealize.In
8、thispaper,asimpleoccursmucheasierinbrittlematerials.Ma
