Abstract: The microscopic stress distribution in particle-filled material is studied byarisymmetric finite-element method.In this work, the second-phase particle in the formof spheres is modelled as elastic with or without a ducticle interphase between matrix andinclusion。 Detail parametric analysis of the effects of the Young′s modulus of particles andthe thickness of interfacial layer on the stress distribution are discussed。The results of numerical calculation indicate that debonding has a strong tendencyto be ini...