Model of inelastic deformation of bcc polycrystalline materials by slip and twinning. Numerical modeling of some processes of deformation

The paper considers a two-level crystal elasto-viscoplastic model of polycrystalline bodies, taking into account the two modes of inelastic deformation - slip and twinning. The different scale levels constitutive equations accordance is used. The proposed model allows to describe deformation processes of polycrystalline materials, such as compression, constrained compression, shear. There are formulations of problems for a representative volume of polycrystalline materials and results of simulation.