Micro-failure process and failure mechanism of brittle rock under uniaxial compression using continuous real-time wave velocity measurement

作     者：WU Zhi-jun WANG Zhi-yang FAN Li-feng WENG Lei LIU Quan-sheng 吴志军;王智洋;范立峰;翁磊;刘泉声

作者机构：School of Civil EngineeringWuhan UniversityWuhan 430072China College of Architecture and Civil EngineeringBeijing University of TechnologyBeijing 100124China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2021年第28卷第2期

页      面：556-571页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Projects(41502283,41772309)supported by the National Natural Science Foundation of China Project(2017YFC1501302)supported by the National Key Research and Development Program of China Project(2017ACA102)supported by the Major Program of Technological Innovation of Hubei Province,China 

主　　题：elastic wave velocity brittle rock failure uniaxial compression test continuous real-time measurement anisotropic damage evolution theory and modelling 

摘      要：In this study,the micro-failure process and failure mechanism of a typical brittle rock under uniaxial compression are investigated via continuous real-time measurement of wave *** experimental results indicate that the evolutions of wave velocities became progressively anisotropic under uniaxial loading due to the direction-dependent development of micro-damage.A wave velocity model considering the inner anisotropic crack evolution is proposed to accurately describe the variations of wave velocities during uniaxial compression *** on which,the effective elastic parameters are inferred by a transverse isotropic constitutive model,and the evolutions of the crack density are inversed using a self-consistent damage *** is found that the propagation of axial cracks dominates the failure process of brittle rock under uniaxial loading and oblique shear cracks develop with the appearance of macrocrack.