Influence of single flaw on the failure process and energy mechanics of rock-like material

被引：148

作者：

Jin, Jin ^{[1
]}

Cao, Ping ^{[1
]}

Chen, Yu ^{[1
,2
]}

Pu, Chengzhi ^{[3
]}

Mao, Dawei ^{[4
]}

Fan, Xiang ^{[5
]}

机构：

[1] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Hunan, Peoples R China

[2] China Univ Min & Technol, State Key Lab Coal Resources & Safe Min, Xuzhou 221116, Jiangsu, Peoples R China

[3] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Peoples R China

[4] Power China Zhongnan Engn Corp Ltd, Changsha 410014, Hunan, Peoples R China

[5] Changan Univ, Sch Highway, Xian 710064, Peoples R China

来源：

COMPUTERS AND GEOTECHNICS | 2017年 / 86卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Failure pattern; Micro-crack increase; Particle deformation field; Energy mechanism; PFC; BONDED-PARTICLE MODEL; FRACTURE COALESCENCE; UNIAXIAL COMPRESSION; CRACK INITIATION; JOINTED ROCK; PROPAGATION; STRENGTH; STRESS;

D O I：

10.1016/j.compgeo.2017.01.011

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

This paper investigates the influence of a flaw on crack initiation, the failure mode, deformation field and energy mechanism of the rock-like material under uniaxial compression. The results of laboratory test and numerical simulation demonstrate the flaw inclination effect can be classified into three groups: 0-30 degrees, 30-60 degrees and 75-90 degrees. The characteristic stresses increase as the flaw angle increases. The tensile cracks initiate from gentle flaws (alpha <= 30 degrees) and shear cracks appear at tips of steep flaws (alpha >= 45 degrees). The input energy, strain energy and dissipation energy of a specimen show approximate increasing trends as the flaw angle increases. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：150 / 162

页数：13

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