中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地理科学与资源研究所
  3. 中国科学院地理科学与资源研究所
  4. 资源与环境信息系统国家重点实验室
  5. 外文论文
Biotite effect on the anisotropic properties of gneiss in Eastern Himalayas, China

文献类型：期刊论文

作者Liu, Shijie1; Lan, Hengxing1,4; Chen, Zhao2; Li, Langping4; Bao, Han3
刊名JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
出版日期2025-08-01
卷号17期号:8页码:4852-4870
关键词Gneiss Biotite Tensile strength Induced crack Crack propagation Fragmentation characteristic
ISSN号1674-7755
DOI10.1016/j.jrmge.2025.01.046; 10.1016/j.jrmge.2025.01.046
产权排序2
文献子类Article
英文摘要Intact rocks with layered microstructures, such as gneiss, exhibit strong anisotropy. Although anisotropy in the macroscopic strength of gneiss has been widely reported, the role of microstructures in tensile mechanics remains largely unclear. Utilizing a range of methodologies, it was determined that the tensile strength, deformation, and fracturing behavior of Himalayan gneiss are predominantly influenced by biotite. In contrast to the behavior of other transversely isotropic rocks, the apparent tensile strength of the gneiss first decreased and then increased with anisotropic angle b, rather than the widely reported monotonic increase or single-shoulder response. The shear sliding of biotite along cleavage planes caused stress concentrations in the surrounding brittle minerals, inducing cracks and reducing the overall tensile strength of the gneiss. Micro-observations of the relationship between cracks and biotite orientation identified three types of biotite crystal fragmentation: tensile fragmentation along cleavage planes, shear fragmentation along cleavage planes, and tensile fragmentation perpendicular to cleavage planes. Tensile and shear fragmentation of biotite along cleavage planes negatively affected the gneiss' macroscopic tensile strength. Conversely, when the tensile stress was parallel to the biotite cleavage planes, tensile fragmentation perpendicular to the cleavage planes increased the macroscopic tensile strength of the gneiss due to plastic deformation and high surface energy. Quantitative analysis of shear stress along biotite cleavage planes revealed the mechanical mechanism behind the reduced tensile strength of the East Himalayan gneisses near an anisotropic angle of 30 degrees. These results elucidated the influence of grainlevel anisotropy on the macroscopic tensile mechanical properties of intact layered rocks. (c) 2025 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Published 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/).
URL标识查看原文
WOS关键词ACOUSTIC-EMISSION CHARACTERISTICS ; TENSILE-STRENGTH ; MECHANICAL ANISOTROPY ; LAYER ORIENTATION ; FAILURE CRITERION ; CRACK INITIATION ; ROCK-MECHANICS ; FRACTURE ; TESTS ; SHALE
WOS研究方向Engineering
语种英语
WOS记录号WOS:001547206100002
出版者ELSEVIER
源URL[http://ir.igsnrr.ac.cn/handle/311030/215518]  
专题资源与环境信息系统国家重点实验室_外文论文
通讯作者Lan, Hengxing
作者单位1.Changan Univ, Coll Geol Engn & Geomat, Xian 710054, Peoples R China;
2.Shaanxi Prov Transport Planning Design & Res Inst, Xian 710065, Peoples R China;
3.Changan Univ, Sch Highway, Xian 710064, Peoples R China
4.Chinese Acad Sci, State Key Lab Resources & Environm Informat Syst, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China;
推荐引用方式
GB/T 7714		 Liu, Shijie,Lan, Hengxing,Chen, Zhao,et al. Biotite effect on the anisotropic properties of gneiss in Eastern Himalayas, China[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2025,17(8):4852-4870.
APA Liu, Shijie,Lan, Hengxing,Chen, Zhao,Li, Langping,&Bao, Han.(2025).Biotite effect on the anisotropic properties of gneiss in Eastern Himalayas, China.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,17(8),4852-4870.
MLA Liu, Shijie,et al."Biotite effect on the anisotropic properties of gneiss in Eastern Himalayas, China".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 17.8(2025):4852-4870.

入库方式： OAI收割

来源：地理科学与资源研究所

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。