Open AccessEvolution of defect structure and indicator of transition to critical state of material
Author(s) -
E. E. Damaskinskaya,
Ivan Panteleev,
Д. В. Корост
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1400/4/044011
Subject(s) - criticality , acoustic emission , feature (linguistics) , function (biology) , pareto distribution , exponential function , power law , energy (signal processing) , statistical physics , nondestructive testing , sample (material) , materials science , forensic engineering , structural engineering , physics , mathematics , engineering , composite material , mathematical analysis , statistics , nuclear physics , thermodynamics , linguistics , philosophy , evolutionary biology , biology , quantum mechanics
A feature that allows one to estimate the degree of criticality of the state of the material subjected to the mechanical load has been identified. Two independent non-destructive methods, i.e., acoustic emission (AE) and X-ray computed microtomography (CT), were used at each stage of sample loading. It was found that the energy distribution of AE signals did not always obey to the Guttenberg-Richter law. It was also found that the type of energy distribution of AE signals could be used as an indicator of the state of a deformed material. The exponential function pointed to a non-critical state; the power-law function indicated that the damage accumulation process had passed to the “dangerous” stage. This feature can be used as a physical basis for a new method of non-destructive testing which will allow one to reveal “dangerous” (requiring replacement or repair) spatial regions of objects (constructions, pipelines, etc.).