Study on the mechanisms of crack turning in bedded rock

被引：23

作者：

Yang, Xiao-Wei ^{[1
,2
]}

Zhang, Xiao-Ping ^{[1
,2
]}

Zhang, Qi ^{[1
,2
]}

Li, Chang-Dong ^{[3
]}

Wang, Ding-Jian ^{[3
]}

机构：

[1] Wuhan Univ, Sch Civil Engn, Key Lab Safety Geotech & Struct Engn Hubei Prov, Wuhan 430072, Peoples R China

[2] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China

[3] China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China

来源：

ENGINEERING FRACTURE MECHANICS | 2021年 / 247卷

基金：

中国国家自然科学基金;

关键词：

Bedded rock; Crack turning; Bonded-particle model; Flaw; Force and displacement analysis; BONDED-PARTICLE MODEL; ANISOTROPIC STRENGTH; UNIAXIAL COMPRESSION; FAILURE CRITERION; SINGLE FLAW; BEHAVIOR; FRACTURE;

D O I：

10.1016/j.engfracmech.2021.107630

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Crack turning is difficult to study by performing physical experiments and field tests due to the multiple and complex cracking processes that occur in bedded rock. Stress concentration around a pre-existing flaw can induce the initiation and propagation of one or two macro-cracks. Hence, crack turning can be observed and analysed. In the present study, the failure of flaw-containing bedded rock is simulated, and the simulation replicates most of the phenomena observed in similar physical experiments. Five types of crack turning at bedding planes are observed during the cracking process. The results reveal that crack turning corresponds to not only tensile cracks but a combination of tensile and shear crack segments. Furthermore, crack turning corresponds to not only the continuous propagation of a single macro-crack but also the coalescence of two macro-cracks. By analysing force and displacement results, some intrinsic mechanisms are also revealed, which is beneficial for the study of bedded rock failure.

引用

页数：26

共 44 条

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