Discrete fracture modeling of asphalt concrete英文文献资料

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1、InternationalJournalofSolidsandStructures46(2009)2593–2604ContentslistsavailableatScienceDirectInternationalJournalofSolidsandStructuresjournalhomepage:www.elsevier.com/locate/ijsolstrDiscretefracturemodelingofasphaltconcretea,*bHyunwookKim,WilliamG.ButtlaraEmpa,SwissFederalLaboratoriesforM

2、aterialsTestingandResearch,Dübendorf8600,SwitzerlandbDepartmentofCivilandEnvironmentalEngineering,UniversityofIllinoisatUrbana-Champaign,Urbana,IL61801,USAarticleinfoabstractArticlehistory:AheterogeneousfractureapproachispresentedformodelingasphaltconcretethatiscomposedofsolidReceived2Octob

3、er2008inclusionsandaviscousmatrix,andissubjectedtomode-Iloadinginthefracturetestconfiguration.AReceivedinrevisedform9February2009heterogeneousfracturemodel,basedonthediscreteelementmethod(DEM),isdevelopedtoinvestigateAvailableonline21February2009variousfracturetougheningmechanismsofasphaltma

4、terialsusingahigh-resolutionimageprocessingtechnique.Anenergy-basedbilinearcohesivezonemodelisusedtomodelthecrackinitiationandprop-Keywords:agationofmaterials,andisimplementedasauser-definedmodelwithinthediscreteelementmethod.HeterogeneousExperimentalfracturetestsareperformedtoinvestigatevar

5、iousfracturebehaviorofasphaltconcreteFractureandobtainmaterialinputparametersfornumericalmodels.Also,bulkmaterialpropertiesarenecessaryAsphaltconcreteImageprocessingforeachmaterialphaseforheterogeneousnumericalmodels;thesepropertiesaredeterminedbyuniax-Discreteelementmethodialcomplexmodulus

6、testsandindirecttensilestrengthtests.Themainobjectiveofthisstudyistointe-Bilinearcohesivezonemodelgratetheexperimentaltestsandnumericalmodelsinordertobetterunderstandthefracturemechanismsofasphalticheterogeneousmaterials.Experimentalresultsandnumericalsimulationsarecomparedatdifferenttestco

7、nditionswithexcellentagreement.TheheterogeneousDEMfracturemod-elingapproachhasthepotentialcapabilitytounderstandvariouscrackmechanismsofquasi-brittlematerials.Ó2009ElsevierLtd.Allrightsreserved.1.Introduction(Rothenburgetal.,1992;SchlangenandvanMier,1992