Structural and analytical mesomechanics of fracture

Abstract

Developing methodology of structural-analytical theory of strength, this article outlines methods for constructing a variant of defining equations of structural-analytical mesomechanics of failure, based on a rational synthesis of the main achievements of continuum mechanics, physics of plasticity and strength of solids, and other related disciplines. Loaded material is considered as a multi-level system in which micro, meso and macro levels are organically interconnected. Each scale level is characterized by its mechanisms and laws of deformation, the evolution of structure and damaging.A method for constructing a two-level fracture criterion is being developed, which takes into account the hierarchical nature of the development of damaging and mutual influence of structural concentrators zones (SCZ) and macro stress concentrators. In order to take into account the influence of SCZ at the mesoscale level, experimentally justified tensor parameters of the magnetomechanical effect are introduced: magnetic distortion tensor and tensor intensity of intrinsic magnetic field of dispersion that occurs in the SCZ of the loaded body. Possible directions for the development of fracture mesomechanics are discussed.