A Texture Component Crystal Plasticity Finite Element Method for Physically-Based Metal Forming Simulations Including Texture Update

摘要

We present a new method for including and updating texture-based elastic-plastic anisotropy in simulations of 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 concept is based on directly feeding spherical crystallographic texture components into a non-linear finite element model. The method is used for performing fast simulations of industry-scale metal forming operations of textured polycrystalline materials including texture update. Instead of yield surface concepts or large sets of discrete grain orientations we use a small set of discrete and mathematically compact Gaussian texture components to map the orientation distribution function discretely onto the integration points of a visco-plastic 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.