Effect of real-time high temperature and loading rate on mode I fracture toughness of granite
文献类型：期刊论文
| 作者 | Yang, Ke1; Zhang, Fan1; Meng, Fan-zhen3; Hu, Da-wei2; Tan, Xian-feng4 |
| 刊名 | GEOTHERMAL ENERGY
 |
| 出版日期 | 2022-08-23 |
| 卷号 | 10期号:1页码:- |
| 关键词 | Granite Real-time high temperature Loading rate Fracture toughness Notched semi-circular bending |
| ISSN号 | 2195-9706 |
| 英文摘要 | An in-depth understanding of the effect of real-time high temperature and loading rate on the fracture toughness of rocks is highly important for understanding the fracture mechanism of Hot Dry Rock (HDR). Three-point bending tests on notched semi-circular bending (NSCB) samples at the real-time temperatures (25, 100, 200, 300, 400 and 500 celcius) and different loading rates (0.1, 0.01 and 0.001 mm/min) were performed to characterize the temperature and rate dependence of the mode I fracture toughness. Besides, the characteristic of the fracture surface morphology was investigated by scanning electron microscope (SEM) and crack deviation distance analysis. Results show that the temperature has a significant effect on the development of intergranular and transgranular cracks. The fracture toughness and peak load are similarly influenced by temperature (i.e., they both decrease with increasing temperature). At the loading rates of 0.1 mm/min and 0.01 mm/min, from 25 to 400 degrees C, the fracture toughness decreases slightly with decreasing loading rates. However, at a loading rate of 0.001 mm/min, the fracture toughness values above 200 degrees C are very similar, and the fracture toughness does not strictly follow the law of decreasing with decreasing loading rate. Especially at 500 degrees C, fracture toughness and loading rate are negatively correlated. Our study also indicates that the effect of loading rate on macroscopic crack propagation path at real-time high temperature is not obvious. This study could provide an important basis for evaluating the safety and stability of geothermal engineering. |
| 学科主题 | Energy & Fuels ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000843516300001 |
| 出版者 | SPRINGER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35352]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, China 3.Qingdao University of Technology, Qingdao, China 4.Faculty of Engineering, China University of Geosciences, Wuhan, China |
| 推荐引用方式 GB/T 7714 | Yang, Ke,Zhang, Fan,Meng, Fan-zhen,et al. Effect of real-time high temperature and loading rate on mode I fracture toughness of granite[J]. GEOTHERMAL ENERGY,2022,10(1):-. |
| APA | Yang, Ke,Zhang, Fan,Meng, Fan-zhen,Hu, Da-wei,&Tan, Xian-feng.(2022).Effect of real-time high temperature and loading rate on mode I fracture toughness of granite.GEOTHERMAL ENERGY,10(1),-. |
| MLA | Yang, Ke,et al."Effect of real-time high temperature and loading rate on mode I fracture toughness of granite".GEOTHERMAL ENERGY 10.1(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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