Analysis of stress and failure in rock specimens with closed and open flaws on the surface  

作　　者：Amin MANOUCHEHRIAN Pinnaduwa H.S.W.KULATILAKE 

机构地区：[1]School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China

出　　处：《Frontiers of Structural and Civil Engineering》2021年第5期1222-1237,共16页结构与土木工程前沿（英文版）

基　　金：The financial supports received from the Jiangxi University of Science and Technology(No.205200100469);the Distinguished Foreign Expert Talent Program Funding are gratefully acknowledged.

摘　　要：The influence of closed and open surface flaws on the stress distribution and failure in rock specimens is investigated.Heterogeneous finite element models are developed to simulate the compression tests on flawed rock specimens.The simulated specimens include those with closed flaws and those with open flaws on the surface.Systematic analyses are conducted to investigate the influences of the flaw inclination,friction coefficient and the confining stress on failure behavior.Numerical results show significant differences in the stress,displacement,and failure behavior of the closed and open flaws when they are subjected to pure compression;however,their behaviors under shear and tensile loads are similar.According to the results,when compression is the dominant mode of stress applied to the flaw surface,an open flaw may play a destressing role in the rock and relocate the stress concentration and failure zones.The presented results in this article suggest that failure at the rock surface may be managed in a favorable manner by fabricating open flaws on the rock surface.The insights gained from this research can be helpful in managing failure at the boundaries of rock structures.

关 键 词：surface flaw HETEROGENEITY circular hole numerical modeling relative displacement 

分 类 号：TU45[建筑科学—岩土工程]