A dislocation-density-based crystal plasticity finite-element model (CPFEM) was developed in which different dislocation densities evolve. Based upon the kinematics of crystal deformation and dislocation interaction laws, dislocation generation and annihilation were modelled. The CPFEM model was calibrated for pure aluminum using experimental stress–strain curves of pure aluminum single crystal from the literature. Crystallographic texture predictions in plane-strain compression of aluminum were validated against experimental observations in the literature. The framework was implemented in ABAQUS with user interface UMAT subroutine.

A Dislocation-Density-Based 3D Crystal Plasticity Model for Pure Aluminum. A.Alankar, I.N.Mastorakos, D.P.Field: Acta Materialia, 2009, 57[19], 5936-46