Plastic Deformation Simulation of Composite Based on Mesoscopic Field Dislocation Mechanics Finite Element Model

摘要

In the present paper, a three-dimensional implementation of a mesoscopic field dislocation mechanics is presented. This model describes the evolution of dislocation fields during plastic deformation. Since the elastic interaction of dislocations is considered directly, it is able to study the plastic response at the mesoscale without introducing length scales as model parameters. The model is embedded in a crystal plasticity framework which is numerically implemented by the finite element method. As a test problem, the simple shearing of a composite with different size of reinforcement is simulated. It is shown that the model is able to reproduce the size effect that is observed in deformed composite materials.