Assessment of full field crystal plasticity finite element method for forming limit diagram prediction

Abstract

This study is inspired by the recent development of "virtual material testing laboratory" in which the main equipment is a full field crystal plasticity modeling tool. Ample examples have demonstrated its applications to sheet forming operations. In those applications, the mechanical anisotropy originated from the crystallographic texture can be adequately described, such as r-values and earing. Formability is another important property in sheet metal forming, which has yet not been equipped in these virtual laboratories. Though theoretical models for formability can be dated back to 1885 due to Considère, all popular models at the moment suffer from their respective limitations. In this study, we explore the feasibility of applying full field crystal plasticity model for calculating forming limit diagram, avoiding using additional assumptions or models for determining the forming limits.