| Popis: |
The paper presents a new FEM-based crystallographic model. The major task of the model is to investigate the inhomogeneous elastoplastic processes on the grain level of deforming polycrystals. The rate-dependent constitutive equations are presented for small deformations of pure fcc metal crystals in the low temperature range. Hardening is regarded via the development of kinematic and isotropic variables. Comprehensive simulations show that the model is capable to predict the typical features of polycrystalline behaviour. Here, special attention is paid to the mechanisms that control the formation of strain localizations. |
