Digital image correlation analysis of crack initiation and failure in heat-treated granite during the Brazilian test
文献类型：期刊论文
| 作者 | Yang, Zheyi; Wu, Jinwen; Cui ZH(崔哲华); Qiu, Yongfeng; Song, Gaoying; Ma, Yiming; Feng, Zijun; Du, Menglin; Geng, Shaobo; Chen, Shuping |
| 刊名 | GEOTHERMICS
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 121页码:15 |
| 关键词 | Heat-treatment Crack opening displacement Digital image correlation Brazilian splitting test |
| ISSN号 | 0375-6505 |
| DOI | 10.1016/j.geothermics.2024.103042 |
| 通讯作者 | Wu, Jinwen(wujinwen1982@163.com) ; Feng, Zijun(fengzijun@tyut.edu.cn) |
| 英文摘要 | Accurately and quantitatively investigating the progression of macro failure cracks in thermal storage rock masses is crucial to ensuring the safe operation of enhanced geothermal systems (EGS). In this study, we employed the digital image correlation method (DIC) to systematically monitor the development of strain and displacement fields in heat -treated granite during Brazilian splitting tests. The deformation process of the specimen can be categorized into three distinct stages: the elastic stage, the plastic deformation stage (involving the formation and development of the fracture process zone (FPZ)), and the failure stage. As the temperature of heat treatment increases, the elastic stage gradually shortens, the plastic stage extends, and the load level at the elastic -plastic transition point ( P E -F ) gradually decreases. Also, the post -peak load failure stage becomes more distinct, attributed to the increased ductility of the material. The crack opening displacement (COD) values at the transition point P E -F (COD b ) under various temperatures consistently fall within the range of 1-13 mu m. The COD at the peak load (COD c ) follows a parabolic trend with temperature. Specifically, the average COD c at 500 degrees C is about 2.21 times higher than that at 25 degrees C, and it is about 20.46 times greater at 1000 degrees C than at 25 degrees C. This temperature -dependent behavior signifies a transition in the rock ' s failure mechanism, beginning to shift from brittle fracture to ductile fracture between the temperature range of 500-600 degrees C. |
| 分类号 | 二类/Q1 |
| WOS关键词 | FRACTURE PROCESS ZONE ; THERMAL-DAMAGE ; TENSILE-STRENGTH ; MECHANICAL-BEHAVIOR ; HIGH-TEMPERATURE ; ROCK ; PERMEABILITY ; DEFORMATION ; COALESCENCE ; EVOLUTION |
| 资助项目 | National Natural Science Foundation of China[51504220] ; National Natural Science Foundation of China[52122405] |
| WOS研究方向 | Energy & Fuels ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001239952700001 |
| 资助机构 | National Natural Science Foundation of China |
| 其他责任者 | Wu, Jinwen ; Feng, Zijun |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/95596]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 推荐引用方式 GB/T 7714 | Yang, Zheyi,Wu, Jinwen,Cui ZH,et al. Digital image correlation analysis of crack initiation and failure in heat-treated granite during the Brazilian test[J]. GEOTHERMICS,2024,121:15. |
| APA | Yang, Zheyi.,Wu, Jinwen.,崔哲华.,Qiu, Yongfeng.,Song, Gaoying.,...&Chen, Shuping.(2024).Digital image correlation analysis of crack initiation and failure in heat-treated granite during the Brazilian test.GEOTHERMICS,121,15. |
| MLA | Yang, Zheyi,et al."Digital image correlation analysis of crack initiation and failure in heat-treated granite during the Brazilian test".GEOTHERMICS 121(2024):15. |
入库方式： OAI收割
来源：力学研究所
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