A finite element method on the basis of texture components for fast predictions of anisotropic forming operations

Abstract

This paper Introduces a novel method of including and updating texture-based elastic-plastic anisotropy during large-strain metal forming operations. The approach is particularly designed for industrial use since it can be assembled by integrating existing software solutions from crystallography and variational mathematics. The approach is based on feeding spherical crystallographic texture components directly into a non-linear finite element model. The method is used to perform fast simulations of industrial-scale metal forming operations of textured polycrystalline materials including texture update, Instead of yield surface concepts or large sets of discrete grain orientations, a small set of discrete and mathematically compact Gaussian texture components was used to map the orientation distribution function discretely onto the integration points of a viscoplastic crystal plasticity finite element model. This method drastically enhances the computing speed and precision compared to previous Crystal plasticity finite element approaches. The publication gives a brief overview of the different anisotropy concepts, provides an introduction to the new texture component crystal plasticity finite element method, and presents examples.