Direct Tensile Test and FDEM Numerical Study on Anisotropic Tensile Strength of Kangding Slate
文献类型：期刊论文
| 作者 | Liu, Ping3,4; Liu, Quansheng3,4; Huang, Xing1; Hu, Mingming1; Bo, Yin3,4; Yuan, Dong2; Xie, Xianqi4,5 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 55期号:12页码:7765 |
| 关键词 | Kangding slate Direct tensile test Anisotropic tensile failure criterion Bedding dip angles Combined finite-discrete element method (FDEM) |
| ISSN号 | 0723-2632 |
| 英文摘要 | A large amount of slates is distributed along Kangding No. 2 tunnel of Sichuan-Tibet Railway (China). The bedding of the Kangding slate is rich, showing apparent anisotropy of strength. For underground tunnels excavated in the anisotropic rock mass, the rock material is vulnerable to damage in tension because of its low tensile strength. Therefore, the tensile strength and fracture modes are important for the support design of layered surrounding-rock tunnel. In this study, first, a series of direct tensile tests were carried out on slate samples with five kinds of bedding dip angles. Second, the effect of bedding dip angle on the slate's tensile strength, failure modes, and acoustic emission characteristics was analyzed. Third, based on the Nova-Zaninetti criterion and the experiment results, a new phenomenological anisotropic criterion was proposed by introducing anisotropic coefficient, which could describe the nonlinear variation trend of tensile strength with foliation angles. Compared with four typical tensile strength criteria, the accuracy and universality of the new criterion were verified. Finally, the new criterion was implemented into the combined finite-discrete element method (FDEM) to conduct direct tensile simulation of slate with different foliation angles. The results indicated that the direct tensile strength followed an S-shaped increasing trend with the variation of foliation angles. The direct tensile failure modes of slate samples with different foliation angles could be divided into layer activation failure, mixed failure, and rock matrix failure. The acoustic emission process of slate with different bedding inclination under direct tension could be roughly divided into the following three stages: quiet period-stepped saltatory increase-drastic increase. The fitting effect of the new criterion was the highest among Kangding slate and other six typical layered rocks, which showed that the new criterion was suitable for predicting its Brazilian strength and direct tensile strength. At the same time, the numerical simulation results were in good agreement with the experimental results, which further verified the accuracy of the new criterion. |
| 学科主题 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000854685700001 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35331]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, Hubei, China 2.China Railway Eryuan Engineering Group Co. Ltd., Chengdu 610031, Sichuan, China 3.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, Hubei, China 4.The Key Laboratory of Geotechnical and Structural Engineering Safety of Hubei Province, School of Civil Engineering, Wuhan University, Wuhan 430072, Hubei, China 5.Hubei (Wuhan) Explosions and Blasting Technology Institute, Jianghan University, Wuhan 430056, Hubei, China |
| 推荐引用方式 GB/T 7714 | Liu, Ping,Liu, Quansheng,Huang, Xing,et al. Direct Tensile Test and FDEM Numerical Study on Anisotropic Tensile Strength of Kangding Slate[J]. ROCK MECHANICS AND ROCK ENGINEERING,2022,55(12):7765. |
| APA | Liu, Ping.,Liu, Quansheng.,Huang, Xing.,Hu, Mingming.,Bo, Yin.,...&Xie, Xianqi.(2022).Direct Tensile Test and FDEM Numerical Study on Anisotropic Tensile Strength of Kangding Slate.ROCK MECHANICS AND ROCK ENGINEERING,55(12),7765. |
| MLA | Liu, Ping,et al."Direct Tensile Test and FDEM Numerical Study on Anisotropic Tensile Strength of Kangding Slate".ROCK MECHANICS AND ROCK ENGINEERING 55.12(2022):7765. |
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。