Fracture toughness weakening effect of high static pre-loaded CSTBD granite subjected to low frequency dynamic disturbance during the rock fracture
文献类型：期刊论文
| 作者 | Wu, Wuxing; Gong, Fengqiang; Jiang, Quan; He, Lei |
| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2022-06-15 |
| 卷号 | 269 |
| 关键词 | High static pre-load Low-frequency dynamic disturbance Fracture toughness weakening effect Deep rock mechanics CSTBD |
| ISSN号 | 0013-7944 |
| 英文摘要 | Highly static pre-loaded rock with cracks will be generated during the deep rock engineering excavation, is subjected to low-frequency dynamic disturbance (Fd) to induce fracture failure. To investigate the fracture mechanisms of the high static pre-loaded rock with cracks, subjected to low-frequency dynamic disturbances, several tests were conducted on cracked straight through Brazilian disc (CSTBD) granite specimens using the MTS system. Based on the average static peak fracture load (Fmax) of the CSTBD specimens, three high static pre-load levels, Fp (70%, 80%, and 90% of Fmax), and the corresponding disturbance amplitude, Fa (30%, 20%, and 10% of Fmax), and low-frequency disturbance frequency, f (1, 5, 10, 30, and 50 Hz), were determined. The results revealed that the fracture toughness of the static pre-loaded CSTBD specimens subjected to lowfrequency dynamic disturbance was lower than that under static load. The higher the Fp, the more significant is the decrease in fracture toughness with f. Comprehensive analysis indicates that the degree of fracture toughness weakening is highly dependent on the Fp, Fd induces strength weakening, and f affects the weakening degree. |
| 学科主题 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000813347400003 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34841]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Southeast University - China; Southeast University - China; 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | Wu, Wuxing,Gong, Fengqiang,Jiang, Quan,et al. Fracture toughness weakening effect of high static pre-loaded CSTBD granite subjected to low frequency dynamic disturbance during the rock fracture[J]. ENGINEERING FRACTURE MECHANICS,2022,269. |
| APA | Wu, Wuxing,Gong, Fengqiang,Jiang, Quan,&He, Lei.(2022).Fracture toughness weakening effect of high static pre-loaded CSTBD granite subjected to low frequency dynamic disturbance during the rock fracture.ENGINEERING FRACTURE MECHANICS,269. |
| MLA | Wu, Wuxing,et al."Fracture toughness weakening effect of high static pre-loaded CSTBD granite subjected to low frequency dynamic disturbance during the rock fracture".ENGINEERING FRACTURE MECHANICS 269(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。