简介：Lowcyclefatiguecrackpropagation(FCP)behavioroftwoPC/ABSblendswithaweightra-tioofPCtoABSbeing80/20and60/40,respectively,isinvestigated.Experimentsarecarriedoutbyusingstandardcompacttension(CT)specimens.Thefracturesurfacesareexaminedwithascanningelectronmi-croscope(SEM).ItisshownthattheFCPresistanceofPC/ABSblendwith20%ABSparticlesishigherthanthatofPC/ABSblendwith40%ABSparticles.ItisfoundthatproperABSparticlecontentcanresultinthetougheningofPC/ABSblendsthroughparticlecavitationandshearyieldinginmatrix.

简介：Toconsidertheanisotropicdamageinfatigue,animprovedboom-panelmodelispresentedtosimulatearepresentativevolumeelement(RVE)intheframeworkofcontinuumdamagemechanics.TheanisotropicdamagestateoftheRVEisdescribedbythecontinuityextentsofboomsandpanels,whosedamageevolutionsareassumedtobeisotropic.Thenumericalimplementationisproposedonthebasisofdamagemechanicsandthefiniteelementmethod.Finally,theapproachisappliedtothefatiguelifepredictionof2A12-T4aluminiumalloyspecimenundercyclicloadingoftension-torsion.Theresultsindicateagoodagreementwiththeexperimentaldata.