Elastoplastic constitutive model for particle-dispersed composites accounting for interfacial damage

摘要

For establishing the constitutive law, the property of a composite material is generally described by focusing on the relation between the average stress and the average strain in multiple phases. While the interface between matrix and inclusions undergoes damage, this relation should be modified accordingly. The effects of damaged interface on the strain field in composite are considered in two ways. First, the degradation of matrix-inclusion interface makes the strain field inside inclusions no longer uniform as that of inclusions with perfectly bonded interface. Secondly, it contributes to the average strain in composite by an additional strain, which is yielded from an integration of relative displacement between matrix and inclusion over their interface.