文献类型：期刊文献

英文题名：Simulation of compression-induced shear-mode cracks in rocks based on experimental investigations performed on gypsum specimens

作者：Xu, Jun[1];Xiao, Xiaochun[1];Lv, Xiangfeng[2];Guo, Pengfei[3];Peng, Yanyan[3]

机构：[1]Liaoning Tech Univ, Sch Mech & Engn, Fuxing 123000, Peoples R China;[2]Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China;[3]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China

年份：2020

卷号：79

期号：8

起止页码：4309

外文期刊名：BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT

收录：SCI-EXPANDED(收录号：WOS:000534789600002)、、EI(收录号：20202108692813)、Scopus(收录号：2-s2.0-85084985347)、WOS

基金：The work described in this paper was substantially supported by the National Natural Science Foundation of China (Nos. 51974186, 51774164, 51774048, 41702381), and all these sources of support are gratefully acknowledged.

语种：英文

外文关键词：Compression-induced shear-mode crack; Initiation and propagation; Crack pattern; Strength; Fracture angle

外文摘要：Compression-induced shear-mode cracks play an important role in the failure process of rocks. To gain insight into the compression-induced shear-mode cracks in rocks, the initiation and propagation of compression-induced shear-mode cracks are investigated via physical experiments and numerical simulations. The experimental results show that compression-induced shear-mode cracks are a common fracture mode and often lead to final failure. The initiation and propagation of compression-induced shear-mode cracks, as well as the strength of the specimen, can be influenced by the spacing between the flaw tips. Compression-induced shear-mode cracks easily initiate and propagate when the spacing between the two pre-existing flaws is small, whereas a larger spacing can reduce the possibility of shear fracturing and is propitious to the generation of compression-induced tensile-mode cracks. In addition, compression-induced shear-mode cracks initiate and generate later than compression-induced tensile-mode cracks. Furthermore, the fracture angles of compression-induced shear-mode cracks are diverse and complex and can be influenced by the spacing between pre-existing flaws. Numerical simulation results suggest that compressive-shear failure initiates randomly in a shear stress field, becomes more localized with the increased loading and eventually results in compression-induced shear-mode cracks.