Mixed mode I-II fracture mechanism of sandstone samples after thermal treatment: Insights from optical monitoring and thermal analysis
文献类型：期刊论文
| 作者 | Feng, Yujie; Su, Haijian; Yu, Liyuan; Wu, Chen; Wang, Hao |
| 刊名 | THEORETICAL AND APPLIED FRACTURE MECHANICS
 |
| 出版日期 | 2023-06-01 |
| 卷号 | 125 |
| ISSN号 | 0167-8442 |
| 关键词 | Mixed mode I -II Fracture process zone Fracture mechanism DIC Thermal analysis |
| 英文摘要 | The complex response of rocks to high temperatures and mixed stress poses a significant challenge in deep rock engineering. Sandstone samples with varying notch offsets were subjected to thermal treatment and then tested under mixed mode I-II loading. The effect of notch offset and temperature on rock fracture mechanism is the focus. By employing digital image correlation (DIC) technology, the complete process of rock fracture was scrutinized and quantitatively characterized. The results indicate that thermal treatment has a negative effect on the peak load, fracture toughness, and fracture energy of sandstone. Specifically, sandstone samples treated at 700 degrees C had a fracture toughness that was less than half that of the samples tested at room temperature. Furthermore, the fracture toughness and fracture energy of sandstone exhibited significant increases with increasing notch offset. In particular, the crack tip displacement (CTD) and crack mouth displacement (CMD) curves of the samples with 72 mm notch offset, compared to the pure mode I loading, show a clear infection point near the peak load. The fracture process zone (FPZ) demonstrates an approximately linear increase with both temperature and notch offset. Additionally, thermal analysis was performed on the sandstone samples, revealing the impact of high temperature on the microstructure and mineral phase transition. |
| 学科主题 | Engineering ; Mechanics |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000975182600001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35090]  |
| 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.China University of Mining & Technology; 3.Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS |
| 推荐引用方式 GB/T 7714 | Feng, Yujie,Su, Haijian,Yu, Liyuan,et al. Mixed mode I-II fracture mechanism of sandstone samples after thermal treatment: Insights from optical monitoring and thermal analysis[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2023,125. |
| APA | Feng, Yujie,Su, Haijian,Yu, Liyuan,Wu, Chen,&Wang, Hao.(2023).Mixed mode I-II fracture mechanism of sandstone samples after thermal treatment: Insights from optical monitoring and thermal analysis.THEORETICAL AND APPLIED FRACTURE MECHANICS,125. |
| MLA | Feng, Yujie,et al."Mixed mode I-II fracture mechanism of sandstone samples after thermal treatment: Insights from optical monitoring and thermal analysis".THEORETICAL AND APPLIED FRACTURE MECHANICS 125(2023). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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