Mineral heterogeneity dominates the tensile failure mode of Eastern Himalayan Gneiss
文献类型：期刊论文
| 作者 | Liu, Shijie3; Lan, Hengxing3,4; Martin, C. Derek2; Li, Langping4; Bao, Han1 |
| 刊名 | JOURNAL OF STRUCTURAL GEOLOGY
 |
| 出版日期 | 2025-11-01 |
| 卷号 | 200页码:105515 |
| 关键词 | Gneiss Mineral heterogeneity Tensile failure Crack initiation Crack propagation |
| ISSN号 | 0191-8141 |
| DOI | 10.1016/j.jsg.2025.105515 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | As two fundamental fracture types in rock engineering, tension and shear fractures are commonly considered to operate under different stress conditions. However, abundant recent research shows that the microscale heterogeneity of rocks leads to the possibility of microscale tensile and shear fracturing under any stress state. In particular, localised stress concentrations and tensile fractures caused by mineral heterogeneity under compressive stress have been widely studied. However, the heterogeneity-induced processes involved in the shear fracture under direct tension conditions remain ambiguous. In this study, a micro-direct tensile test was used to comprehensively reveal the process and mechanism by which mineral heterogeneity leads to shear fracture in the gneiss of the eastern Himalayas under direct tension. Microscopic observation of the failure process under direct tension, normalised crack initiation and propagation stress, and transverse strain dilation caused by shear behaviour indicate that gneiss with an exceptional anisotropy angle may exhibit more pronounced shear sliding during progressive tensile failure processes. Micro shear sliding significantly increased the strength of the gneiss and changed its tensile strain, elastic modulus, and progressive failure process, which were determined using a direct tension test. Depending on the degree of frictional sliding, the tensile failure mode of gneiss can be divided into three modes: tensile, hybrid, and shear. Mineral heterogeneity influences the pattern of crack propagation through potential fracture planes, altering the crack propagation stress, significantly affecting the mobilisation of frictional strength, and resulting in a progressive transition between the three modes. The observation of shear sliding under direct tension caused by heterogeneity emphasises the importance of mineral-scale heterogeneity in evaluating the tensile strength of anisotropic rocks. |
| URL标识 | 查看原文 |
| WOS关键词 | MICROCRACKING BEHAVIOR ; STRENGTH ; FRACTURE ; ROCK ; DEFORMATION ; SYNTAXIS ; GROWTH ; TESTS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001543131900001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/215519]  |
| 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, Sch Highway, Xian 710064, Shaanxi, Peoples R China 2.Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB T6G 2W2, Canada; 3.Changan Univ, Coll Geol Engn & Geomat, Xian 710054, Shaanxi, Peoples R China; 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Liu, Shijie,Lan, Hengxing,Martin, C. Derek,et al. Mineral heterogeneity dominates the tensile failure mode of Eastern Himalayan Gneiss[J]. JOURNAL OF STRUCTURAL GEOLOGY,2025,200:105515. |
| APA | Liu, Shijie,Lan, Hengxing,Martin, C. Derek,Li, Langping,&Bao, Han.(2025).Mineral heterogeneity dominates the tensile failure mode of Eastern Himalayan Gneiss.JOURNAL OF STRUCTURAL GEOLOGY,200,105515. |
| MLA | Liu, Shijie,et al."Mineral heterogeneity dominates the tensile failure mode of Eastern Himalayan Gneiss".JOURNAL OF STRUCTURAL GEOLOGY 200(2025):105515. |
入库方式： OAI收割
来源：地理科学与资源研究所
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