  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
Consid\`{e}re, 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.
