Open AccessСтруктура деформируемого гетерогенного материала по данным акустической эмиссии и рентгеновской микротомографии
Author(s) -
Е.Е. Дамаскинская,
И.А. Пантелеев,
Д.Р. Гафурова,
Д.И. Фролов
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.07.46122.017
Subject(s) - acoustic emission , criticality , materials science , nondestructive testing , tomography , deformation (meteorology) , sample (material) , geology , mineralogy , optics , composite material , physics , nuclear physics , quantum mechanics , thermodynamics
Accumulation of defects at various stages of the deformation of a structurally inhomogeneous material (granite) has been studied using two nondestructive methods: acoustic emission (AE) and X-ray computer microtomorgaphy (CT). The quasi-static testing of cylindrical samples of a Westerly granite was carried out under uniaxial compression. The control of the defect formation was realized using the real-time monitoring of acoustic emission. For each sample under study, several steps of the loading and tomographic imaging have been performed. We have found that an exponential or power-law function of the energy distribution of the AE signals makes it possible to select a sample region, in which the system of defects has transited into a self-organized criticality state and large cracks have been formed. This result coincides with the data of the X-ray tomography Computer Microtomography.