Micromechanical Modeling and Simulation of the Elastoplastic Behavior of Composite Materials

摘要

Composite materials are the preeminent drivers for the significant enhancement to products that meet recent industrial requests. Nevertheless, their variability and the complexity of the innovative products introduce a great challenge in predicting the mechanical response fundamental for the composite design engineering. Then, to pledge a faster and more cost-effective development product, the experimental practice is switched to virtual simulation tools using advanced multi-scale analyses techniques. Indeed; developing predictive micromechanical models that enable to derive the composites' macroscopic behavior in realistic environment based on the microscopic behavior of each constituent is obviously defiance. Therefore, to evaluate the micromechanical response of complex composite materials which are mainly nonlinear, a new micromechanical model is proposed to meticulously typify the elastoplastic behavior of composite materials and determine the optimized design. The model is developed following the composite design perspectives using a Hill-type incremental formulation and the classical J2 plasticity theory to derive the tangent operators in each phase. To assess the predictive accuracy of the estimation, the analogy to the experimental data and the exact finite element solution is proved.