Computational Study of Polycrystalline Behaviour under Complex Loading Conditions

Abstract

The finite element method is used to simulate macroscopic inelastic responses of a polycrystalline structure. An explicit approach is used in which polycrystalline aggregate consists of the specified number of single crystals (grains) discretized into the finite elements. The global behaviour of the structure is based on the simplified constitutive equations of its constituent grains which have the random three-dimensional crystallographic orientations. The macroscopic behaviour of this model under complex loading histories is studied, specifically, its responses to the corner-type loading paths with the different corner angles. At each loading point the microscopic grain state represented by slip system development is also evaluated.