Mechanical behavior and fracture mechanism of red-bed mudstone under varied dry-wet cycling and prefabricated fracture planes with different loading angles
文献类型：期刊论文
| 作者 | Huang, Kang2,3; Dai, Zhangjun2; Meng, Yaoyao4; Yu, Fei2; Yao, Junkai1; Zhang, Wei2,3; Chi, Zecheng2,5; Chen, Shanxiong2 |
| 刊名 | THEORETICAL AND APPLIED FRACTURE MECHANICS
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 127页码:18 |
| 关键词 | Dry-wet cycling Mechanical behavior Failure patterns Microfracture characteristics Fracture mechanism |
| ISSN号 | 0167-8442 |
| DOI | 10.1016/j.tafmec.2023.104094 |
| 英文摘要 | Red-bed mudstone is a common geological material in engineering construction in the Southwest region in China. Its initial fractures are easily influenced by the combined effects of dry-wet cycling and external loads. Therefore, evaluating the mechanical behavior and fracture mechanism of red-bed mudstone under dry-wet cycling and prefabricated fracture planes with different loading angles is of great significance. In this study, the cracked straight through Brazilian disc (CSTBD) specimens with a prefabricated crack were tested using an RMT testing machine. Multiple-scale analysis methods, including digital image correlation (DIC) and acoustic emission (AE) techniques, 3D scanning, and scanning electron microscopy (SEM), were employed to comprehensively analyze the mechanical evolution and fracture damage mechanism of mudstone under dry-wet cycling. The experimental results indicate that as the loading angle increases, the peak load gradually increases, while an increase in the number of dry-wet cycles leads to a decrease in peak load. At the same time, dry-wet cycling causes the expansion and connection of initial microcracks, forming weak layers that affect the morphology of the main crack and the distribution of secondary cracks. Furthermore, with an increasing number of dry-wet cycles, the acoustic emission count significantly decreases, and the relative high value range of acoustic emis-sion count expands. 3D scanning results show that an increase in the number of dry-wet cycles results in rougher fracture planes, while an increase in loading angle generally increases the roughness of the fracture planes. Additionally, SEM observations reveal that with an increasing number of dry-wet cycles, intragranular fracture patterns and microcrack distribution become more widespread, and tensile and shear fracture patterns are also observed in the center of the fracture plane. These research findings have important practical value for evaluating the stability and reliability of red-bed mudstone under dry-wet cycling and prefabricated fracture planes with different loading angles. |
| 资助项目 | National Natural Science Founda-tion of China[42172308] ; Youth Innovation Promotion Asso-ciation CAS[2022331] ; Science and Technology Research and Development Program of China State Railway Group Co., Ltd.[J2022G002] |
| WOS研究方向 | Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001082097000001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39685]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Dai, Zhangjun |
| 作者单位 | 1.China Acad Railway Sci Corp Ltd, Beijing 10081, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Anhui Univ Sci & Technol, State Key Lab Min Response & Disaster Prevent & Co, Huainan 232000, Peoples R China 5.China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Kang,Dai, Zhangjun,Meng, Yaoyao,et al. Mechanical behavior and fracture mechanism of red-bed mudstone under varied dry-wet cycling and prefabricated fracture planes with different loading angles[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2023,127:18. |
| APA | Huang, Kang.,Dai, Zhangjun.,Meng, Yaoyao.,Yu, Fei.,Yao, Junkai.,...&Chen, Shanxiong.(2023).Mechanical behavior and fracture mechanism of red-bed mudstone under varied dry-wet cycling and prefabricated fracture planes with different loading angles.THEORETICAL AND APPLIED FRACTURE MECHANICS,127,18. |
| MLA | Huang, Kang,et al."Mechanical behavior and fracture mechanism of red-bed mudstone under varied dry-wet cycling and prefabricated fracture planes with different loading angles".THEORETICAL AND APPLIED FRACTURE MECHANICS 127(2023):18. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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