T0301-2-4 Investigation of inhomogeneous local stress and strain distribution by a polycrystalline finite element model

Abstract

Although macroscopic behavior of polycrystalline materials is isotropic and homogenous in terms of elastic deformation, the anisotropic property of each crystal produces nonuniform stress and strain at the microstructural level even under a uniform remote stress condition. In this study, in order to quantify the nonuniform stress/strain, a three-dimensional polycrystalline body consisting of 1024 grains of random orientation was subjected to finite element analyses with crystal plasticity constitutive model. It was shown that the stress and strain on the surface of the body was inhomogeneous and variations in the stress and strain were quantified.