Mesoplasticity FEM Simulation on Mechanical Properties of FCC Metals.

Abstract

This paper proposes a new concept for dislocation simulation using a mesoplasticity FEM. This FEM system is based on the crystalline plasticity theory that takes into account twelve slip systems of an FCC lattice. This paper relates slides on these slip systems with dislocation behavior, and proposes a new anisotropic workhardening rule based on dislocation interaction. This paper also developes a new description of lattice rotation, and introduces them into a mesoplasticity FEM. This FEM is applied to simulations of tensile and compressive processes of crystalline metals. Results show that the Bauschinger effect arises even in a single crystal, and is attributed to change of active slip systems. The simulation also reviels role of dislocation behavior in a crystalline material on the Hall-Petch relationship.