Rate-dependent strength and crack damage thresholds of rocks at intermediate strain rate
文献类型：期刊论文
| 作者 | Li, Haibo1,2 ; Liu, Liwang1,2; Fu, Shuaiyang1,2; Liu, Bo1,2; Li, Xiaofeng1
|
| 刊名 | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
 |
| 出版日期 | 2023-11-01 |
| 卷号 | 171页码:12 |
| 关键词 | Servo-controlled apparatus Strain rate Confining pressure Rate-dependent strength Crack damage thresholds |
| ISSN号 | 1365-1609 |
| DOI | 10.1016/j.ijrmms.2023.105590 |
| 英文摘要 | To investigate the rate dependence on the mechanical behaviours of rocks under intermediate strain rate, three types of rock were loaded by using a newly developed servo-controlled dynamic triaxial apparatus. In this study, the dynamic strength and crack damage thresholds of rocks under different confinements were investigated at the strain rate range of 10-3-100s-1, which is of significance to understand the rock damage subjected to earthquakes or far-field blasts. The results indicate that the apparatus could ensure the rock samples being loaded under a stable strain rate without causing prominent disturbance on the confining stress. In addition, the strength and damage thresholds are dependent on the strain rate, i.e., the increasing strain rate would result in the in-crease of dynamic strength and crack damage thresholds. The increase of confinement leads to a higher failure strength, the crack initiation and damage stresses are also positively correlated to the confining pressure under dynamic loads. Based on the theory of fracture mechanics that considers the crack growth velocity, it is found that the dynamic stress intensity factor exhibits a negative correlation with both the strain rate and confining pressure, whilst the fracture toughness presents an inverse trend. Therefore, the larger axial stress is required to initiate the cracks, which might further induce the variation of crack initiation stress. |
| 资助项目 | National Key R & D Pro- gram of China[2020YFA0711802] ; National Natural Science Foundation of China[51439008] |
| WOS研究方向 | Engineering ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:001149123600001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40505]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Liu, Liwang |
| 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 |
| 推荐引用方式 GB/T 7714 | Li, Haibo,Liu, Liwang,Fu, Shuaiyang,et al. Rate-dependent strength and crack damage thresholds of rocks at intermediate strain rate[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2023,171:12. |
| APA | Li, Haibo,Liu, Liwang,Fu, Shuaiyang,Liu, Bo,&Li, Xiaofeng.(2023).Rate-dependent strength and crack damage thresholds of rocks at intermediate strain rate.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,171,12. |
| MLA | Li, Haibo,et al."Rate-dependent strength and crack damage thresholds of rocks at intermediate strain rate".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 171(2023):12. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。