Abstract: Particlereinforcedmetalmatrixcompositeshavecomplexmeso-structure.Theconstructionof itsgeometricmodelisachallengingworkintheresearchofitsmechanicalproperties.ThroughthePythonlanguageinterfaceoftheABAQUSsoftware,theparametricmodelingofthecomplexmesoscopic modelofparticlereinforcedmetalmatrixcompositeswasrealizedandencapsulatedintoaplug-in.The plug-incanconstructtheaxisymmetricunitcellmodel,thethree-dimensionalperiodicunitcellmodel andtherandomlydistributedrepresentativevolumeelementmodel.Theeffectofzirconiatoughenedaluminaparticles(ZTA)onthemechanicalpropertiesofzirconiatoughenedaluminaparticlesreinforcedironmatrixcomposites(ZTAp/Fe45)wasanalyzed.Theresultsshowsthatthestrengtheningeffectofirregularpolyhedralparticlesontheelasticmodulusofthecompositeswasgreaterthanthatofspherical particles.However,theirregularmorphologyofZTAresultedinmorestressconcentrationinthecomposites.WiththeincreaseofZTAparticlevolumefraction,theelasticmodulusofZTAp/Fe45composites
showsanupwardtrend,whichindicatesthattheelasticpropertiesofcompositescanbeeffectivelyimprovedbyaddingreinforcedparticles.Inthecaseoflowinterfacialmodulus,theimprovementofinterfacialbondingpropertiescansignificantlyimprovetheelasticmodulusofcomposites.Aftertheinterfacial modulusreachesthematrixmodulus,theeffectofincreasinginterfacialmodulusontheelasticmodulus ofcompositesgraduallyslowsdown.