Numerical study on cracking behavior and fracture failure mechanism of flawed rock materials under uniaxial compression

被引：24
作者：
Niu, Yong [1 ,2 ,3 ]
Wang, Jin-Guo [2 ]
Wang, Xing-Kai [1 ,4 ,7 ]
Hu, Yun-Jin [1 ,8 ]
Zhang, Jian-Zhi [3 ]
Zhang, Ran-Ran [5 ]
Hu, Zhi-Jun [6 ]
机构：
[1] Shaoxing Univ, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing, Zhejiang, Peoples R China
[2] Hohai Univ, Sch Earth Sci & Engn, Nanjing, Jiangsu, Peoples R China
[3] Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou, Peoples R China
[4] State Key Lab Coal Min & Clean Utilizat, Beijing, Peoples R China
[5] Northwestern Polytech Univ, Sch Ecol & Environm, Xian, Shaanxi, Peoples R China
[6] Zhejiang Univ Sci & Technol, Sch Environm & Nat Resources, Hangzhou, Zhejiang, Peoples R China
[7] Shaoxing Univ, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312099, Zhejiang, Peoples R China
[8] Zhejiang Univ Sci & Technol, Sch Environm & Nat Resources, Hangzhou 310023, Zhejiang, Peoples R China
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2023年 / 46卷 / 06期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
crack coalescence; crack initiation; failure criterion; fracture behavior; fracture mechanism; numerical method; BRITTLE SANDSTONE; PERIDYNAMIC MODEL; COALESCENCE; DEFORMATION; PROPAGATION; SPECIMENS; FISSURES; DISCONTINUITIES;
D O I：
10.1111/ffe.13983
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The numerical approach is a vital means for evaluating the stability of flawed rocks. In this paper, the extended non-ordinary state-based peridynamics (NOSB-PD) theory is employed to simulate the fracture process of rocks containing two pre-existing flaws. Two stress criteria, including the maximum tensile stress criterion and the Mohr-Coulomb criterion, are implemented into the NOSB-PD numerical method to respectively judge the tensile and shear failure of rock materials. The effects of inclination angles and ligament angles on the crack initiation and coalescence modes for flawed rocks are investigated based on the numerical results. The numerical results are in good agreement with the previous experimental results. The fracture mechanism of flawed rocks is revealed based on the evolutionary distribution characteristics of the maximum principal stress field and shear stress field obtained by the extended NOSB-PD theory.
引用
收藏
页码：2096 / 2111
页数：16
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