Micromechanical approach to the elastoplastic behavior of a fiber reinforced composite

Based on Mori-Tanaka method and the equivalent inclusion theory，the bridging matrix which is used to define the relationship between mean stress tensors in resin and fiber of fiber-reinforcement composites can be achieved in this paper，as well as the explicit formula of matrix components. Considering the influence of factors such as practical engineering，symmetry of compliance matrix，physical performance of resin and micro-geometrical characteristics，the expression of components is simplified reasonably. Corrected parameters，which are the functions of the equivalent plastic strain of the matrix，are introduced and the mean stress distributions of fibers and resin are determined accordingly. The numerical results indicate that the theoretical values of the method presented in this paper are well fit with experimental results.