简介:Anenergy-dissipationbasedviscoplasticconsistencymodelispresentedtodescribetheperformanceofconcreteunderdynamicloading.Thedevelopmentofplasticityisstartedwiththethermodynamichypothesesinorderthatthemodelmayhaveasoundtheoreticalbackground.Independenthardeningandsofteningandtheratedependenceofconcretearedescribedseparatelyfortensionandcompression.AmodifiedimplicitbackwardEulerintegrationschemeisadoptedforthenumericalcomputation.Staticanddynamicbehaviorofthematerialisillustratedwithcertainnumericalexamplesatmaterialpointlevelandstructurallevel,andcomparedwithexistingexperimentaldata.Resultsvalidatetheeffectivenessofthemodel.
简介:Theelasto-plasticpostbucklingoffibermetallaminatedbeamswithdelaminationandtheenergyreleaseratealongthedelaminationfrontarediscussedinthispaper.Consideringgeometricalnonlinearity,thermalenvironmentandgeometricalinitialimperfection,theincrementalnonlinearequilibriumequationsofdelaminatedfibermetallaminatedbeamsareestablished,whicharesolvedusingthedifferentialquadraturemethodanditerativemethod.Basedonthese,accordingtotheJ-integraltheory,theelasto-plasticenergyreleaserateisstudied.Theeffectsofsomeimportantparametersontheelasto-plasticpostbucklingbehaviorandenergyreleaserateofthearamidreinforcedaluminumlaminatedbeamsarediscussedindetails.