Influence of heterogeneity on mechanical and acoustic emission behaviours of stratified rock specimens

Published on Aug 31, 2018in European Journal of Environmental and Civil Engineering1.832
· DOI :10.1080/19648189.2017.1373709
Ang Li4
Estimated H-index: 4
(Hohai University),
Guojian Shao4
Estimated H-index: 4
(Hohai University)
+ 3 AuthorsHougai Shi2
Estimated H-index: 2
(Hohai University)
Sources
Abstract
AbstractThis paper investigates the influence of heterogeneity on mechanical and acoustic emission (AE) behaviours of stratified rock specimens under uniaxial compression using a digital image processing (DIP)-based finite difference method (FDM). In the DIP, a developed image segmentation algorithm based on seeded region growing (SRG) is proposed to fully acquire the mesostructure of stratified rock specimens, instead of the traditional threshold value method. To sufficiently capture the heterogeneity of stratified rock, Weibull statistical manner is adopted to describe mechanical properties of each material component. Three schemes are adopted to study the effect of heterogeneity with different homogeneity index and different mesostructure under two compression loading conditions. The results show that heterogeneity has a great influence on the mechanical and AE behaviours of stratified rock. As the homogeneity of material components increases, the peak strength and brittleness of rocks increase, and the...
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