Numerical study of crack propagation in an indented rock specimen

被引：56
作者：
Liu, Jie [1 ,2 ]
Wang, Jun [1 ]
Wan, Wen [3 ]
机构：
[1] Hunan Inst Engn, Dept Bldg Engn, Xiangtan, Peoples R China
[2] Hunan Univ Sci & Technol, Hunan Prov Key Lab Safe Min Tech Coal Mines, Xiangtan, Hunan, Peoples R China
[3] Hunan Univ Sci & Technol, Sch Resource Environm & Safety Engn, Xiangtan, Hunan, Peoples R China
来源：
COMPUTERS AND GEOTECHNICS | 2018年 / 96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：
Stress evolution; Indentation; Crack propagation; Chip; Discrete element method; TBM DISC CUTTER; UNIAXIAL COMPRESSION; ELEMENT-METHOD; INDENTATION TESTS; CONFINING STRESS; SINGLE FLAW; FRAGMENTATION; BEHAVIOR; CONFINEMENT; MECHANICS;
D O I：
10.1016/j.compgeo.2017.10.014
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Indentations were simulated to investigate the stress evolution characteristics of the indentation process using the discrete element method (DEM). The maximum principle stress and the shear stress were recorded by applying measurement circle logic. The results indicate that an increase in indentation force contributes to the concentration of shear and tensile stresses at the crack tips. The indentation force decreases because of the crack propagation, which is accompanied by stress dissipation at the crack tips. In addition, tensile and shear-tensile cracks, propagating in different modes, have been observed. The results show that the shear-tensile cracks are responsible for chip formation.
引用
收藏
页码：1 / 11
页数：11
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