On the deformation with the special type of stress tensor

The physical theories of elasticity and plasticity explain non-elastic behavior by various defects in crystalline structure of materials, namely, dislocation, disclination, etc. It implies the necessity of modeling of these materials by revocation of pseudo-Riemannian spaces. Authors analyze two approaches to research on deformations of pseudo-Riemannian spaces with different special types of a stress tensor.