Finite element analysis of deformation behaviour in ductile matrix containing hard particles

Three-dimensional finite element analyses were carried out to study the deformation behaviour in ductile matrix-hard particle composite systems. Models with transversely aligned and staggered particle distributions were used. The deformation constraints in the models were investigated and the development of triaxial stress states in the models was studied. It was determined that the strengthening behaviour arises as a result of geometrical hardening in the early stage of composite deformation. Special deformation stages in the overall stress-strain behaviour of the composite microstructures such as initiation of microyielding, expansion of the plastically deformed region, and spread of plastic flow were determined by following the development of plasticity.