| Abstract Scope |
Sheet metal forming requires accurate description of plastic anisotropy, which is directly dependent on the crystallographic texture. In this paper, we present finite-element simulations of forming process that accounts for the anisotropy in the plastic deformation of the constituent grains and the initial texture of the material. Specifically, an elastoplastic anisotropic constitutive model recently developed is used to model the crystal level behavior that is defined for any stress state and fulfills the symmetry requirements associated with crystal lattice. In the FE simulations, a polycrystalline aggregate associated with each FE integration point. The orientation and the hardening of the individual grains are updated, and the macroscopic stress for use in the solution of the continuum equilibrium equations is obtained from the stresses in each grain. Illustrative examples presented demonstrate the predictive capabilities of our model to describe the behavior of strongly textured Aluminum alloys for the highly non-linear applications. |