Study of mode II fracture characteristics and roughness in salt rock after treatment coupled thermo-hydro-mechanical environment
文献类型：期刊论文
| 作者 | Meng, Tao1,2; Wang, Tongtao1; Guo, Kai3; Zhang, Dengke2 |
| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2023-10-26 |
| 卷号 | 291页码:21 |
| 关键词 | Coupled THM pretreatment Mode II loading Fracture characteristics Fracture topography Digital image correlation technique |
| ISSN号 | 0013-7944 |
| DOI | 10.1016/j.engfracmech.2023.109572 |
| 英文摘要 | It is crucial to observe the fracture characteristics and roughness of rocks subjected to thermohydro-mechanical (THM) coupling experiments. Previous studies have predominantly focused on investigating fracture characteristics in mode I, with comparatively less attention given to mode II fractures of rocks, especially following combined THM treatment. Therefore, this study focuses on utilizing salt rock as the primary subject, and the specimens are pretreated using a selfdesigned THM coupling triaxial tester. Subsequently, the three-point bending (SCB) test is conducted under ambient pressure conditions. At the peak load stage, the length of the fracture process zone is determined using the digital image correlation (DIC) technique. Additionally, macroscopic and microscopic fracture information on the fracture surface is recorded using 3D laser scanning and electron microscopy. Fracture roughness is evaluated using the apparent tilt function. The findings indicate that: 1) When subjected to various THM coupling conditions, the fracture toughness of salt rock in mode II exhibits a similar evolutionary pattern to that of mode I. However, its value experiences a rapid decrease once the temperature exceeds 500 degrees C. 2) With increasing temperature, the number of microcracks in salt rock and the degree of microdamage both escalate, leading to a progressive extension of the fracture process zone at the crack tip during the peak stage. 3) Gradually increasing temperature causes a progressive rise in the fracture roughness of salt rock. This is evident in the fact that the roughness along the crack propagation direction is less than that perpendicular to the crack propagation direction. The anisotropy of fracture roughness diminishes gradually. |
| 资助项目 | Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering ; Institute of Rock and Soil Mechanics ; Chinese Academy of Sciences[SKLGME021025] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDC10020300] ; National Natural Science Foundation of China[42072307] ; Hubei Province Outstanding Youth Fund[2021CFA095] |
| WOS研究方向 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001080021100001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39627]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Wang, Tongtao |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Taiyuan Univ Sci & Technol, Taiyuan 030024, Peoples R China 3.PetroChina, Gas Storage Co, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Tao,Wang, Tongtao,Guo, Kai,et al. Study of mode II fracture characteristics and roughness in salt rock after treatment coupled thermo-hydro-mechanical environment[J]. ENGINEERING FRACTURE MECHANICS,2023,291:21. |
| APA | Meng, Tao,Wang, Tongtao,Guo, Kai,&Zhang, Dengke.(2023).Study of mode II fracture characteristics and roughness in salt rock after treatment coupled thermo-hydro-mechanical environment.ENGINEERING FRACTURE MECHANICS,291,21. |
| MLA | Meng, Tao,et al."Study of mode II fracture characteristics and roughness in salt rock after treatment coupled thermo-hydro-mechanical environment".ENGINEERING FRACTURE MECHANICS 291(2023):21. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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