Mechanical Behavior and Fracture Evolution Mechanism of Composite Rock Under Triaxial Compression: Insights from Three-Dimensional DEM Modeling
文献类型：期刊论文
| 作者 | Song, Yu1; Yang, Sheng-Qi1; Li, Ke-Sheng1; Yin, Peng-Fei1; Pan, Peng-Zhi2 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2023-07-21 |
| 页码 | 27 |
| 关键词 | Transversely isotropic rock Three-dimensional discrete element model Weak bedding faces Mechanical behavior Fracture characteristics Internal stress behavior |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-023-03443-8 |
| 英文摘要 | Existing studies on transversely isotropic rock formations, a special geology, have mainly focused on its mechanical characteristics; whereas, investigations on its fracture process and damage microscopic mechanisms are relatively limited. To remedy this deficiency, in this study, a three-dimensional numerical model is established using discrete elements (PFC3D), focusing on the effects of confining pressure (0, 5, 10, 15, and 20 MPa) and laminar inclination angle (& theta;(0 & DEG;), & theta;(15 & DEG;), & theta;(30 & DEG;), & theta;(45 & DEG;), & theta;(60 & DEG;), & theta;(75 & DEG;), and & theta;(90 & DEG;)) on the failure behavior of the composite rock. To demonstrate the accuracy of the simulations, the stress-strain curves and ultimate failure modes obtained from the numerical simulations were compared with the previous laboratory mechanical test results and X-ray CT images. Numerical models using the smooth-joint contact model were shown to simulate the laboratory results reasonably well. Numerical simulation results indicate that the confining pressure and laminar angle significantly influence the internal crack evolution patterns of the specimen. The internal cracks change from a concentrated to a discrete distribution as the confining pressure increases. The internal cracks of specimens with & theta;(0 & DEG;) and & theta;(90 & DEG;) laminar inclination emerges from the soft rock and eventually extends to the hard rock, while the inclined specimens crack from the laminar face and finally spread to the rock matrix, which can be explained by the graph of the increasing number of cracks. In addition, the internal principal stress and tangential stress in soft and hard rocks were monitored by arranging measurement circles, and it was found that the tangential stresses are the essential cause of the difference between the mechanical behavior of the two rock types. |
| 资助项目 | National Natural Science Foundation of China[42077231] ; Fundamental Research Funds for the Central Universities[2021ZDPYJQ002] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001034290700002 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39065]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Yang, Sheng-Qi |
| 作者单位 | 1.China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China 2.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, Yu,Yang, Sheng-Qi,Li, Ke-Sheng,et al. Mechanical Behavior and Fracture Evolution Mechanism of Composite Rock Under Triaxial Compression: Insights from Three-Dimensional DEM Modeling[J]. ROCK MECHANICS AND ROCK ENGINEERING,2023:27. |
| APA | Song, Yu,Yang, Sheng-Qi,Li, Ke-Sheng,Yin, Peng-Fei,&Pan, Peng-Zhi.(2023).Mechanical Behavior and Fracture Evolution Mechanism of Composite Rock Under Triaxial Compression: Insights from Three-Dimensional DEM Modeling.ROCK MECHANICS AND ROCK ENGINEERING,27. |
| MLA | Song, Yu,et al."Mechanical Behavior and Fracture Evolution Mechanism of Composite Rock Under Triaxial Compression: Insights from Three-Dimensional DEM Modeling".ROCK MECHANICS AND ROCK ENGINEERING (2023):27. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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