Continuous-discontinuous element method for three-dimensional thermal cracking of rocks

被引:9
|
作者
Nie, Wen [1 ]
Wang, Junlin [1 ]
Feng, Chun [2 ]
Zhang, Yiming [1 ]
机构
[1] Hebei Univ Technol, Sch Civil & Transportat Engn, Tianjin 300401, Peoples R China
[2] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
来源
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING | 2023年 / 15卷 / 11期
基金
中国国家自然科学基金;
关键词
Rock thermal cracking; Continuous-discontinuous element; Simplex integration; Temperature dependence; Numerical simulation; NUMERICAL MANIFOLD METHOD; MESHFREE METHOD; EMBEDDED APPROACH; MODEL; DEFORMATION; TEMPERATURE; PERIDYNAMICS; PROPAGATION; SIMULATION; INITIATION;
D O I
10.1016/j.jrmge.2023.02.017
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
Thermal cracking of rocks can significantly affect the durability of underground structures in engineering practices such as geothermal energy extraction, storage of nuclear waste and tunnelling in freeze-thaw cycle induced areas. It is a scenario of strong coupled thermomechanical process involving discontinuity behaviours of rocks. In this context, a numerical model was proposed to investigate the thermal cracking of rocks, in a framework of the continuous-discontinuous element method (CDEM) for efficiently capturing the initiation and propagation of multiple cracks. A simplex integration strategy was adopted to account for the influences of temperature-dependent material properties. Several benchmark tests were considered and the obtained results were compared with analytical solutions and numerical results from the literature. The results show that the fracture degree of the cases when considering temperature-dependent material parameters had 10% differences approximately compared with the cases with constant parameters. (C) 2023 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/).
引用
收藏
页码:2917 / 2929
页数:13
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