On the Crack Propagation in Structural Materials and Rocks From the Standpoint of Synergetics

Abstract

Purpose: The aim of the work is to analyze from the standpoint of the principles of synergetics the experimental results of the destruction of solid polymers, steels and rocks.Methodology: To analyze experimental data on the propagation of fracture cracks during quasi-static and pulse stretching and bending of samples of solid polymers (PMMA), steels and concrete, taking into account the stock of elastic or elastic-plastic energy at the time of failure. Analyze the shape and quantitative characteristics of dissipative structures that are formed in a solid body when the crack propagates through the material.Findings: Analysis of the distribution modes of county and fast trainings in polymeric materials (PMMA), tool steels and concrete according to different schemes and modes of loading samples shows that the abrupt nature of their movement with periodic trading speed of private or zero is the basis of genealogical organization. The nature of this phenomenon is based on the principles of synergetic, which determine the principle of minimum energy production.Originality: It is shown that the patterns of crack propagation in solid polymers, metals and rocks have a synergistic nature. A working hypothesis on the synergetic mechanism of softening and deformation control of brittle dilatation rocks near underground plants is formulated.Practical implications: It is shown that the nature of the distribution of county cracks during PMMA fracturing, as well as rapid cracks during pulse stretching and bending flat samples of PMMA and the capital as a whole are subject to energy principles, in particular the principle of minimum energy production. It is obvious that for the qualitative and quantitative description of structural changes and destructive deformation of rocks near underground cultivations there is a lack of models of solid environment mechanics. In practice, you need to listen to the abrupt nature of the processes and cooperative effects.