Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Academic Titles: President of international exchange committee of the Chinese Society of Rock Mechanics and Engineering CSRME
Other Post: Vice President of the Chinese Society of Rock Mechanics and Engineering CSRME
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Paper Publications
Study of the fracture process in heterogeneous materials around boreholes filled with expansion cement
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Indexed by:Journal Article
Date of Publication:2017-05-01
Journal:INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Included Journals:Scopus、EI、SCIE
Volume:112
Page Number:1-15
ISSN:0020-7683
Key Words:Fracture process; Expansion cement; Numerical simulation; Heterogeneous materials
Abstract: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.