Studies on Mode II Rock Crack Propagation on Different Loading Environments

C. Cheng; M.X. Li; Y. Liu; X. Zhang; Y.Y. Cheng; X.T. Ling

doi:10.4028/www.scientific.net/KEM.713.305

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 713Studies on Mode II Rock Crack Propagation on...

Studies on Mode II Rock Crack Propagation on Different Loading Environments

Abstract:

In this paper, a new type of specimen, which can be easily made by rock core through geological exploration, of mode II rock crack has been designed and processed. The crack propagation forces F of the specimen are measured under different temperatures and different confining pressures. The crack extension patterns are observed. The 3D finite element model of the specimen is established. The stresses near crack tip are calculated to get the value of K_IIC when the crack initiation. The variation of K_IICof the model II rock crack is obtained under different temperatures and confining pressures. The experiments and numerical results show that temperature and confining pressure have obviously influence on K_IIC, the value of K_IIC decreases with the temperature increasing, and increases with the confining pressure increasing. The results of the paper can provide an important reference for analyzing the stability of the rock cracks in underground engineering.

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Periodical:

Key Engineering Materials (Volume 713)

Pages:

305-308

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.713.305

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Online since:

September 2016

Authors:

C. Cheng*, M.X. Li, Y. Liu, X. Zhang, Y.Y. Cheng, X.T. Ling

Keywords:

Different Confining Pressures, Different Temperatures, Failure Patterns, Finite Element Method (FEM), K_IIC, Mode II, New Type Specimen, Rock Crack

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