Modeling Damage Evolution in Heterogeneous Granite Using Digital Image-Based Grain-Based Model
文献类型：期刊论文
| 作者 | Hu, Xunjian2,3; Xie, Ni4; Zhu, Qizhi5; Chen, Liang1; Li, PengCheng4 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2020-07-17 |
| 页码 | 21 |
| ISSN号 | 0723-2632 |
| 关键词 | Grain-based model Damage Heterogeneity Digital image processing |
| DOI | 10.1007/s00603-020-02191-3 |
| 英文摘要 | A particle-based discrete element model combined with digital image processing to take into account the grain geometry and size distribution is used to investigate the mechanical and microcracking behavior of Beishan granite (BG), a typical crystalline rock potential for nuclear waste disposal in China. First, the procedure to construct a digital image-based grain-based model is introduced. The unsupervisedK-means clustering algorithm is used to determine mineral boundaries, and four micro-parameters are assigned according to the Weibull distribution to reflect micro-heterogeneity of rock. Then, the model is calibrated to the macro-properties of BG obtained from laboratory tests, and consistency between model simulation and laboratory test results of both microcracking processes and failure modes is found. It is shown that intragrain cracks are initiated successively in quartz, feldspar, and mica; and their numbers in quartz and feldspar are much more than that in mica. Crack cluster, forking cracks and cataclastic microcracking are typical in quartz, while the "voids" is found in mica. Grain property heterogeneity has a significant impact on micro-cracking behavior and macro-properties of the model, with greater heterogeneity resulting in a lower uniaxial compression strength and elastic modulus, and a more scattered distribution of microcrack inclination. The modeling procedures presented here provide an effective method for investigating mechanical and damage behavior of granites, with specific consideration of heterogeneity involving the distribution of mineral grains and their mechanical properties. |
| 资助项目 | National Natural Science Foundation of China[41877265] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| 出版者 | SPRINGER WIEN |
| WOS记录号 | WOS:000549687200001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/24525]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Xie, Ni |
| 作者单位 | 1.Beijing Res Inst Uranium Geol, CNNC Key Lab Geol Disposal High Level Radioact Wa, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.China Univ Geosci Wuhan, Fac Engn, Wuhan 430074, Peoples R China 5.Hohai Univ, Geotech Res Inst, Nanjing 210098, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Xunjian,Xie, Ni,Zhu, Qizhi,et al. Modeling Damage Evolution in Heterogeneous Granite Using Digital Image-Based Grain-Based Model[J]. ROCK MECHANICS AND ROCK ENGINEERING,2020:21. |
| APA | Hu, Xunjian,Xie, Ni,Zhu, Qizhi,Chen, Liang,&Li, PengCheng.(2020).Modeling Damage Evolution in Heterogeneous Granite Using Digital Image-Based Grain-Based Model.ROCK MECHANICS AND ROCK ENGINEERING,21. |
| MLA | Hu, Xunjian,et al."Modeling Damage Evolution in Heterogeneous Granite Using Digital Image-Based Grain-Based Model".ROCK MECHANICS AND ROCK ENGINEERING (2020):21. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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