Study on Macroscopic Mechanical Behavior and Meso-failure Evolution of Gabbro of Different Particle Sizes
文献类型：期刊论文
| 作者 | Ding, Haifeng3,4; Fu, Xiaodong3,4; Sheng, Qian3,4; Chen, Jian1,3,4; Yan, Chengzeng5; Tian, Kaiwei3,4; Hu, Bo2 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2023-09-10 |
| 页码 | 17 |
| 关键词 | Rock heterogeneity Mechanical behaviour Micro-fracture mechanism Gabbro FDEM Digital image processing |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-023-03531-9 |
| 英文摘要 | As a typical heterogeneous material, the macroscopic mechanical properties of rocks are influenced by factors, such as the type, size, and spatial distribution of internal mineral particles. To study the influence of microscopic heterogeneity on the nonlinear mechanical behavior and fracture process of rocks, DIP (digital image processing) technology and FDEM (finite-discrete element method) are used to establish numerical models that characterize the microstructures of three types of gabbro: coarse-grained, medium-grained, and fine-grained. First, CT (Computed Tomography) scan images were segmented and vectorized. Then, the model was calibrated based on uniaxial compression experiment results. Finally, numerical tests of uniaxial compression were carried out on the three heterogeneous models to explore the deformation characteristics, crack propagation laws, and energy conversion effects of the micro-heterogeneous structures of the three gabbros. Combined numerical and laboratory uniaxial compression experiments results, the results showed that micro-cracks in gabbro appeared at the boundary between clinopyroxene and plagioclase, and propagated continuously along the mineral interface, and the final crack distribution was controlled by the spatial distribution of mineral particles. In addition, the particle size of gabbro had a significant impact on the micro-crack propagation and macroscopic mechanical properties of the model. The finer the particle size, the smaller the heterogeneity, the higher the UCS (uniaxial compression strength) and E (elastic modulus), the faster the energy dissipation, and the stronger the brittleness of the rock. The results of this study conclude the macroscopic mechanical behavior and micro-failure mechanism of gabbro in the compressed state, and also provide technical support for the study of similar rocks. |
| 资助项目 | Youth Innovation Promotion Association CAS[2021325] ; National Natural Science Foundation of China[U21A20159] ; National Natural Science Foundation of China[52179117] ; China-Pakistan Joint Research Center on Earth Sciences |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001062600600004 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39403]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Fu, Xiaodong |
| 作者单位 | 1.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad, Pakistan 2.Changan Univ, Sch Civil Engn, Xian 710064, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 5.China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ding, Haifeng,Fu, Xiaodong,Sheng, Qian,et al. Study on Macroscopic Mechanical Behavior and Meso-failure Evolution of Gabbro of Different Particle Sizes[J]. ROCK MECHANICS AND ROCK ENGINEERING,2023:17. |
| APA | Ding, Haifeng.,Fu, Xiaodong.,Sheng, Qian.,Chen, Jian.,Yan, Chengzeng.,...&Hu, Bo.(2023).Study on Macroscopic Mechanical Behavior and Meso-failure Evolution of Gabbro of Different Particle Sizes.ROCK MECHANICS AND ROCK ENGINEERING,17. |
| MLA | Ding, Haifeng,et al."Study on Macroscopic Mechanical Behavior and Meso-failure Evolution of Gabbro of Different Particle Sizes".ROCK MECHANICS AND ROCK ENGINEERING (2023):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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