Coarse-graining of cohesive zone at interface of amorphous material

Abstract

This work studies on coarse-graining of the cohesive zone at the interface of an amorphous material. A coarse-grained cohesive zone model is obtained with the aid of homogenization and relaxation method. The amorphous material in atomic scale is homogenized and the effect of its domain volume upon homogenization is investigated through molecular dynamics. The homogenized amorphous material is then utilized for coarse-graining at the interface. Coarse-graining leads to an increase of opening displacement and a decrease of decohesion stress while fracture toughness of the interface is conserved.