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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：President of international exchange committee of the Chinese Society of Rock Mechanics and Engineering CSRME
其他任职：国际岩石力学与岩石工程学会（ISRM）中国国家小组副主席
性别：男
毕业院校：东北大学
学位：博士
所在单位：土木工程系
办公地点：综合实验四号楼330
联系方式：tca@mail.neu.edu.cn
Study of the fracture process in heterogeneous materials around boreholes filled with expansion cement
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论文类型：期刊论文
发表时间：2017-05-01
发表刊物：INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
收录刊物：SCIE、EI、Scopus
卷号：112
页面范围：1-15
ISSN号：0020-7683
关键字：Fracture process; Expansion cement; Numerical simulation; Heterogeneous materials
摘要：A numerical model is proposed to study crack initiation, propagation and coalescence in heterogeneous materials subjected to expansion pressure in boreholes using the finite element method and damage mechanics. The strength heterogeneity of materials is modeled at the mesoscopic level using the Weibull distribution. Using this numerical model, the initiation and propagation of cracks generated by expansion cement in boreholes were simulated. The numerical simulations qualitatively reproduced the crack patterns in samples tested in laboratory experiments. Moreover, the results clarified the failure mechanisms and fracture processes, thereby contributing to a better understanding of fracture mechanisms in heterogeneous materials subjected to expansion pressure in boreholes. The numerical model allows direct observation of the entire process of crack initiation and growth to a degree that would be difficult to obtain in experimental studies. (C) 2017 Elsevier Ltd. All rights reserved.