The energy dissipation of particle-reinforced metal-matrix composite with ductile interphase

Abstract

The finite element analysis together with cell modeling method has been employed to simulate the behavior of energy dissipation for the particle-reinforced metal-matrix composites (PMMCs) with a ductile interphase in this paper. The influences of strain amplitude ε 0, ratio of elastic constant r, relative thickness R i / R p of the interphase on the energy dissipation ψ of the whole composite at the room temperature have been investigated under cyclic external loading. The results show that, when the elastic constant ratio r is less than 1, the energy dissipation of the composite is much higher than that when the elastic constant ratio r is more than 1. The results also show that, when the interphase is soft, the energy dissipation ψ of the whole composite decreases with the increasing of the elastic constant ratio r, while, it increases when the interphase is hard. And with the ratio of elastic constant r in a certain range (just around r=1), the energy dissipation ψ of the composite decreases with the increasing of the relative thickness, but increases when the ratio of elastic constant is out of the certain range.