期刊
ENGINEERING FRACTURE MECHANICS
卷 178, 期 -, 页码 212-230出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2017.04.037
关键词
Rock fracture; Heterogeneous specimens; 3-D internal crack; Weibull distribution; Slope project
类别
资金
- National Natural Science Foundation of China [51608117, 51209094]
- Specialized Research Fund for the Doctoral Program for higher Education [20130131110033]
- National High-tech R&D Program of China (863 Program) [2012AA041802]
To analyse the damage evolution process of jointed rock masses, a modified numerical model on the basis of secondary development in fast Lagrangian analysis of Continua (FLAC3D) is proposed to simulate the fracture development of jointed rock mass. To validate the feasibility of this numerical model, numerous case studies on 2-D and 3-D cracking problems are conducted. The progressive failure processes of rock specimens with two pre-cracks under uniaxial and biaxial compressions are simulated and compared with the results obtained from the lab experiments, and they are found to be in good agreement. The failure processes of heterogeneous rock specimens with four pre-cracks are studied for further analysis. When applied to 3-D cases, the numerical results consistently match lab test results. Moreover, it is also used to analyse the failure process of a 3-D Weibull distribution specimen with an internal crack. Finally, it is used to investigate the crack propagation and stability of a slope project, presenting an excellent effect. It is concluded that this numerical model is effective and efficient in dealing with 3-D and numerous element cases. (C) 2017 Elsevier Ltd. All rights reserved.
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