Shear band evolution and acoustic emission characteristics of sandstone containing non-persistent flaws
文献类型：期刊论文
| 作者 | Miao, Shuting1,2; Pan, Peng-Zhi1,2; Zhang, Chuanqing1,2; Huo, Lei3 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2024-02-01 |
| 卷号 | 16期号:2页码:497-513 |
| 关键词 | Shear band evolution Acoustic emission (AE) Crack coalescence Normal stress Shear sliding |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.04.0031674-7755 |
| 英文摘要 | Direct shear tests were conducted on sandstone specimens under different constant normal stresses to study the coalescence of cracks between non-persistent flaws and the shear sliding characteristics of the shear-formed fault. Digital image correlation and acoustic emission (AE) techniques were used to monitor the evolution of shear bands at the rock bridge area and microcracking behaviors. The experimental results revealed that the shear stresses corresponding to the peak and sub-peak in the stressdisplacement curve are significantly affected by the normal stress. Strain localization bands emerged at both the tip of joints and the rock bridge, and their extension and interaction near the peak stress caused a surge in the AE hit rate and a significant decrease in the AE b value. Short and curvilinear strain bands were detected at low normal stress, while high normal stress generally led to more microcracking events and longer coplanar cracks at the rock bridge area. Furthermore, an increase in normal stress resulted in a higher AE count rate and more energetic AE events during friction sliding along the shearformed fault. It was observed that the elastic energy released during the crack coalescence at the prepeak stage was much greater than that released during friction sliding at the post-peak stage. More than 75% of AE events were located in the low-frequency band (0-100 kHz), and this proportion continued to rise with increasing normal stress. Moreover, more AE events of low AF value and high RA value were observed in specimens subjected to high normal stress, indicating that greater normal stress led to more microcracks of shear nature. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
| 资助项目 | National Natural Science Foundation of China[52125903] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001234764800001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41444]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Pan, Peng-Zhi |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.CASIC Res Inst Intelligent Decis Engn, Wuhan 430040, Peoples R China |
| 推荐引用方式 GB/T 7714 | Miao, Shuting,Pan, Peng-Zhi,Zhang, Chuanqing,et al. Shear band evolution and acoustic emission characteristics of sandstone containing non-persistent flaws[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(2):497-513. |
| APA | Miao, Shuting,Pan, Peng-Zhi,Zhang, Chuanqing,&Huo, Lei.(2024).Shear band evolution and acoustic emission characteristics of sandstone containing non-persistent flaws.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(2),497-513. |
| MLA | Miao, Shuting,et al."Shear band evolution and acoustic emission characteristics of sandstone containing non-persistent flaws".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.2(2024):497-513. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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