Uniaxial and Multiaxial Ratchetting of SiCp/6061Al Composites: Constitutive Modeling and Finite Element Simulation

Abstract

Based on the Eshelby equivalent inclusion theory and Mori-Tanaka (MT) averaging method, a meso-mechanical cyclic elasto-plastic constitutive model used for the simulation of uniaxial and multiaxial ratchetting of particle-reinforced metal matrix composites was proposed. The uniaxial and multiaxial rachetting behaviours of SiCP/6061Al composites are predicted by the proposed model. Then the simulations by the model are compared with those by the finite element analysis with the help of the representative volume element (RVE) of the composites. It is shown that: the proposed meso-mechanical constitutive model can describe the multiaxial ratchetting of the SiCP/6061Al composites reasonably; while the predicted ratchetting by the meso-mechanical model is fairly weaker than that by the finite element method due to the different choices of homogenization methods.