Development of mesoscopic field dislocation mechanics finite element model and application in microplasticity

摘要

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