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Loading rate dependence of staged damage behaviors of granite under uniaxial compression: Insights from acoustic emission characteristics

文献类型：期刊论文

作者Zhai, Mengyang1,2,3; Xu, Chao1,2,3; Xue, Lei1,2; Cui, Yuan1,2,3; Dong, Jinyu4
刊名THEORETICAL AND APPLIED FRACTURE MECHANICS
出版日期2022-12-01
卷号122页码:15
ISSN号0167-8442
关键词Granite Damage process Loading rate Acoustic emission Uniaxial compression
DOI10.1016/j.tafmec.2022.103633
英文摘要A series of laboratory-based uniaxial compression tests combined with acoustic emission (AE) monitoring was conducted to investigate the loading rate dependence of AE characteristics and the damage process of granite. Experimental results showed that the mechanisms of formation and evolution of cracks within the rock during loading can be characterized by AE parameters and real-time spatial AE locations. With increasing loading rate, the cumulative AE count decreased as a negative power function while the cumulative AE energy decreased almost linearly. Decreasing b-values indicate additional large-magnitude AE events and more concentrated distribution modes of fractures under high-speed loading conditions. Moreover, with increasing loading rate, the dominant failure mechanism was observed to transition from shear to tensile. A transition from tensile to shear crack modes during the damage process of each sample was noted to correspond with a decrease in b-values and the onset of crack nucleation, which may serve as a diagnostic precursor to rock failure. Crack nucleation pat-terns also exhibited rate dependence. Under low-speed loading conditions, nucleation was initiated at the un-stable crack growth stage and was characterized by interactions between linked tensile microcrack arrays to form a shear macrorupture zone, whereas crack nucleation advanced to the stable crack growth stage under high-speed loading conditions, resulting in vertical splitting.
WOS关键词STRAIN-RATE ; ANISOTROPIC SHALE ; ROCK FAILURE ; HARD-ROCK ; B-VALUE ; FRACTURE ; SPECIMENS ; STRESS ; MECHANISMS ; PRESSURE
资助项目National Natural Science Foundation of China ; National Key Research and Development Program of China ; [42090052] ; [41977249] ; [2019YFC1509701]
WOS研究方向Engineering ; Mechanics
语种英语
出版者ELSEVIER
WOS记录号WOS:000879914600002
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/107706]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Zhai, Mengyang; Xue, Lei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.North China Univ Water Resources & Elect Power, Res Inst Geotech Engn & Hydraul Struct, Zhengzhou 450046, Peoples R China
推荐引用方式
GB/T 7714		 Zhai, Mengyang,Xu, Chao,Xue, Lei,et al. Loading rate dependence of staged damage behaviors of granite under uniaxial compression: Insights from acoustic emission characteristics[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2022,122:15.
APA Zhai, Mengyang,Xu, Chao,Xue, Lei,Cui, Yuan,&Dong, Jinyu.(2022).Loading rate dependence of staged damage behaviors of granite under uniaxial compression: Insights from acoustic emission characteristics.THEORETICAL AND APPLIED FRACTURE MECHANICS,122,15.
MLA Zhai, Mengyang,et al."Loading rate dependence of staged damage behaviors of granite under uniaxial compression: Insights from acoustic emission characteristics".THEORETICAL AND APPLIED FRACTURE MECHANICS 122(2022):15.

入库方式： OAI收割

来源：地质与地球物理研究所

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