Anisotropic time-dependent behaviors of shale under direct shearing and associated empirical creep models
文献类型：期刊论文
| 作者 | Xie, Yachen1,2,3; Hou, Michael Z.3; Liu, Hejuan2; Li, Cunbao1 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2024-04-01 |
| 卷号 | 16期号:4页码:1262-1279 |
| 关键词 | Rock anisotropy Direct shear creep Creep compliance Steady -creep rate Empirical model Creep constitutive model |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.05.001 |
| 英文摘要 | Understanding the anisotropic creep behaviors of shale under direct shearing is a challenging issue. In this context, we conducted shear-creep and steady-creep tests on shale with five bedding orientations (i.e. 0 degrees, 30 degrees, 45 degrees, 60 degrees, and 90 degrees), under multiple levels of direct shearing for the first time. The results show that the anisotropic creep of shale exhibits a significant stress-dependent behavior. Under a low shear stress, the creep compliance of shale increases linearly with the logarithm of time at all bedding orientations, and the increase depends on the bedding orientation and creep time. Under high shear stress conditions, the creep compliance of shale is minimal when the bedding orientation is 0 degrees, and the steadycreep rate of shale increases significantly with increasing bedding orientations of 30 degrees, 45 degrees, 60 degrees, and 90 degrees. The stress-strain values corresponding to the inception of the accelerated creep stage show an increasing and then decreasing trend with the bedding orientation. A semilogarithmic model that could reflect the stress dependence of the steady-creep rate while considering the hardening and damage process is proposed. The model minimizes the deviation of the calculated steady-state creep rate from the observed value and reveals the behavior of the bedding orientation's influence on the steady-creep rate. The applicability of the five classical empirical creep models is quantitatively evaluated. It shows that the logarithmic model can well explain the experimental creep strain and creep rate, and it can accurately predict long-term shear creep deformation. Based on an improved logarithmic model, the variations in creep parameters with shear stress and bedding orientations are discussed. With abovementioned findings, a mathematical method for constructing an anisotropic shear creep model of shale is proposed, which can characterize the nonlinear dependence of the anisotropic shear creep behavior of shale on the bedding orientation. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
| 资助项目 | National Natural Science Foundation of China[U22A20166] ; National Natural Science Foundation of China[12172230] ; Guangdong Basic and Applied Basic Research Foundation[2023A1515012654] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001271914000001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42089]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Cunbao |
| 作者单位 | 1.Shenzhen Univ, Shenzhen Key Lab Deep Engn Sci & Green Energy, Shenzhen 518060, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Tech Univ Clausthal, Inst Subsurface Energy Syst, D-38678 Clausthal Zellerfeld, Germany |
| 推荐引用方式 GB/T 7714 | Xie, Yachen,Hou, Michael Z.,Liu, Hejuan,et al. Anisotropic time-dependent behaviors of shale under direct shearing and associated empirical creep models[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(4):1262-1279. |
| APA | Xie, Yachen,Hou, Michael Z.,Liu, Hejuan,&Li, Cunbao.(2024).Anisotropic time-dependent behaviors of shale under direct shearing and associated empirical creep models.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(4),1262-1279. |
| MLA | Xie, Yachen,et al."Anisotropic time-dependent behaviors of shale under direct shearing and associated empirical creep models".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.4(2024):1262-1279. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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