An Insight into the Mechanical and Fracture Characterization of Minerals and Mineral Interfaces in Granite Using Nanoindentation and Micro X-Ray Computed Tomography
文献类型：期刊论文
| 作者 | Liu, Xiu-yang; Xu, Ding-ping; Li, Shao-jun; Qiu, Shi-li; Jiang, Quan |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2023-05-01 |
| 卷号 | 56期号:5页码:3359 |
| ISSN号 | 0723-2632 |
| 关键词 | Deep-buried granite Modulus Mineral interface Fracture toughness Upscaling analysis Nanoindentation Micro X-ray computed tomography |
| 英文摘要 | It is extremely important to investigate the mechanical properties and failure characteristics of granite at the mesoscale to understand the mesoscopic evolution mechanism of the time-dependent fracture of deep-buried hard rocks. This study explores the mesoscopic mechanical properties (i.e., hardness, Young's modulus, and fracture toughness) of the primary granite minerals and their interfaces using nanoindentation. Micro X-ray computed tomography was used to analyze the fracture characteristics of the failed Brazilian disc of granite. Moreover, two homogenization upscaling methods were used to calculate granite's Young's modulus and compared with that from uniaxial compression test results. The results demonstrate the following: (1) The mechanical properties of granite minerals are related to the peak load of nanoindentation. Young's modulus and hardness of quartz, K-feldspar, and plagioclase decrease with an increase in the peak load and tend to be stable when the peak load reaches 5000 mu N, whereas Young's modulus and hardness of biotite at multiple peak loads are in variability and irregularity. (2) Young's modulus and hardness of quartz-plagioclase and quartz-biotite interfaces are between quartz and plagioclase and quartz and biotite, respectively. Furthermore, a linear formula is proposed to estimate fracture toughness based on Young's modulus of granite minerals. (3) The generalized means method that predicts granite's Young's modulus is more accurate compared to the Mori-Tanaka method. (4) Under Brazilian splitting conditions, similar to 84% of tensile cracks along intragranular cracks primarily occur in feldspar minerals, while similar to 16% along grain boundaries occur at feldspar-biotite interfaces. |
| 学科主题 | Engineering ; Geology |
| 语种 | 英语 |
| 出版者 | SPRINGER WIEN |
| WOS记录号 | WOS:000919233200001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34805]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; 2.Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS |
| 推荐引用方式 GB/T 7714 | Liu, Xiu-yang,Xu, Ding-ping,Li, Shao-jun,et al. An Insight into the Mechanical and Fracture Characterization of Minerals and Mineral Interfaces in Granite Using Nanoindentation and Micro X-Ray Computed Tomography[J]. ROCK MECHANICS AND ROCK ENGINEERING,2023,56(5):3359. |
| APA | Liu, Xiu-yang,Xu, Ding-ping,Li, Shao-jun,Qiu, Shi-li,&Jiang, Quan.(2023).An Insight into the Mechanical and Fracture Characterization of Minerals and Mineral Interfaces in Granite Using Nanoindentation and Micro X-Ray Computed Tomography.ROCK MECHANICS AND ROCK ENGINEERING,56(5),3359. |
| MLA | Liu, Xiu-yang,et al."An Insight into the Mechanical and Fracture Characterization of Minerals and Mineral Interfaces in Granite Using Nanoindentation and Micro X-Ray Computed Tomography".ROCK MECHANICS AND ROCK ENGINEERING 56.5(2023):3359. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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