文献类型：期刊文献

英文题名：Cracking evolution and failure mechanism of brittle rocks containing pre-existing flaws under compression-dominating stresses: Insight from numerical approach

作者：Niu, Yong[1];Chen, Zewen[1];Yang, Shengqi[1];Hu, Yunjin[1];Liu, Bolong[1];Shao, Caijun[1];Guo, Yanhui[2]

机构：[1]Shaoxing Univ, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312099, Zhejiang, Peoples R China;[2]Kunming Univ Sci & Technol, Fac Publ Safety & Emergency Management, Kunming 650093, Yunnan, Peoples R China

年份：2024

卷号：134

外文期刊名：THEORETICAL AND APPLIED FRACTURE MECHANICS

收录：SCI-EXPANDED(收录号：WOS:001337257800001)、、EI(收录号：20244217219368)、Scopus(收录号：2-s2.0-85206476230)、WOS

基金：The present work is supported by the National Natural Science Foundation of China (Grant No. 41977256), the Shaoxing Basic Public Welfare Planning Project (Grant No. 2022A13004), the Zhejiang Natural Science Foundation (Grant No. LHZ21D020001), which are gratefully acknowledgement.

语种：英文

外文关键词：Fracture criterion; Failure mechanism; Peridynamic; Brittle materials; Compression-dominating stresses

外文摘要：Comprehending the cracking evolution and failure mechanism of flawed rocks under compression-dominating stresses is essential to evaluating the stability of rock engineering. In this work, a newly developed geometry constraint-based non-ordinary state-based peridynamic (GC-NOSBPD) theory that can eliminate the numerical oscillation is applied to predict the development of new cracks of flawed rocks under compression-dominating stresses. The failure of bonds between particles is judged by the bond-associated stress-based fracture criteria. The cracking evolution trajectories of semi-disc and disc specimens containing flaws are traced. The effects flaw inclination angle on the cracking trajectories are analyzed. The cracking evolution paths of rock-like specimens with two flaws under uniaxial and biaxial compression are molded. The effects of confining stress on the growth of new cracks are investigated. The confining stress restrains the propagation of tensile cracks, it is easy to promote the growth of shear cracks. The concentration and transfer effects of stress can plainly revel the failure mechanism of flawed rocks. The present numerical method is reasonable to predict the tensile shear failure modes of flawed specimens under compression-dominating stresses.