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Shock and Vibration
Volume 2018 (2018), Article ID 2968205, 16 pages
Research Article

A Numerical Research on Crack Process of Gypsum Containing Single Flaw with Different Angle and Length in Uniaxial Loading

1Nuclear Resources Engineering College, University of South China, Hengyang, China
2Institut für Geotechnik, Technische Universität Bergakademie Freiberg, Freiberg, Germany

Correspondence should be addressed to He Guicheng

Received 15 August 2017; Accepted 23 November 2017; Published 4 January 2018

Academic Editor: Caiping Lu

Copyright © 2018 Dai Bing et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


To investigate the crack behaviour of rock or rock-like material in uniaxial loading, a series of numerical simulations were conducted on gypsum specimens containing a single flaw with different inclination angle (0°–90°) and length (10 mm–30 mm). Based on the numerical simulations results, the effect of flaw length on peak strength, the CI stress, and the CD stress were investigated with different inclination angles. The results show that the peak strength decreased initially and then increased with increasing of the flaw angle. Meanwhile, the peak strength decreased gradually when the length of the preexisting flaw increased. When the inclination angle was 30°, 45°, and 60°, the reduction degree of peak strength increased with increasing of the flaw length. The CI stress and CD stress not only depend on the inclination angle but also depend on flaw length. Four types of crack were observed in numerical simulations. The present research facilitates increased understanding of crack behaviour of rock under different conditions.