elasto-plastic analysis

elasto-plastic analysis

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时间:2019-08-04

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1、TheoreticalandAppliedFractureMechanics55(2011)131–139ContentslistsavailableatScienceDirectTheoreticalandAppliedFractureMechanicsjournalhomepage:www.elsevier.com/locate/tafmecElasto-plasticanalysisofinfluencesofbonddeformabilityonthemechanicalbehavioroffibernetworksaa,⇑bbJ.X.Liu,Z.T.Chen,H.

2、Wang,K.C.LiaDepartmentofMechanicalEngineering,UniversityofNewBrunswick,15DineenDrive,Fredericton,NB,CanadaE3B5A3bDepartmentofChemicalEngineering,UniversityofNewBrunswick,2GarlandCourt,Fredericton,NB,CanadaE3B6C2articleinfoabstractArticlehistory:Micromechanicalmodelingofthree-dimensional(

3、3D)fibernetworksisperformedbyreducingthewebAvailableonline28April2011structuretofibersegmentsandfiber–fiberbondstoexploretheinfluenceoffiber–fiberbonddeformabi-lityonfibernetwork’selasto-plasticity.ThefibersegmentbetweeneverytwoadjacentbondsisdescribedKeywords:byaTimoshenkobeamelement,whilefiber–fi

4、berbondsaretakenasadifferenttwo-nodeelementduetoFibernetworktheextremelylargeheight-to-spanratio.Thisovercomestherigid-bondassumptionemployedbymostNetworkmodelingpreviousnetworkmodels,providingthefeasibilitytobuildtherelationshipbetweenbondingconditionBonddeformabilityandglobalmechanical

5、properties,resultingina3DnetworkstructureandabletoaccommodatecurledElasto-plasticityfibers.Bothfibersandbondsareassumedtobeelasto-plasticanddescribedbythebilinearkinematicNewton–Raphsonmethodhardeningmodel.DeformationofthenetworkwithloadincreasingissimulatedbytheNewton–Raphsonmethod.Numeri

6、caltensiletestsshowreasonableresultsandagreequalitativelywithexperiments.Theinfluenceofbonddeformabilityonthemechanicalbehaviorofthenetworkisdiscussedindetail.Ó2011ElsevierLtd.Allrightsreserved.1.IntroductionLotsofnetworkmodelswithrigidbondshavebeendevelopedforsimulatingrandomfiberwebs[3,1

7、0,22]).AsystematicreviewFibernetworkscomposedofrandomlydistributingfibersaboutnetworkmodelsorequallylatticemodelsfordifferentmate-[10,20]arestudiednumericallywithnecessarysimplifications.rialscanbefoundin[23].ForpapersheetscomposedofrandomTypicalexamplesarepapersheetsandsom

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