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Numerical Simulations on Cracking Behavior of Rock-Like Specimens with Single Flaws under Conditions of Uniaxial and Biaxial Compressions
The expanded distinct element method based on a strain strength criterion was applied herein with the aim of analyzing and comparing the cracking behaviors of rock-like specimens with single flaws under uniaxial and biaxial compressions. The cracking characteristics in uniaxial and biaxial compressions were compared and the effects of confining pressure on the tensile/shear behaviors were analyzed. The confining pressure obviously changed the boundary condition and the cracking behaviors in biaxial compression. The initiation stress, the peak strength, and the number of shear cracks in biaxial compression were obviously larger than in uniaxial compression. The confining pressure affected the initiation and propagation of the secondary cracks, the failure mechanisms, and the distribution of horizontal displacement fields in a large extent. The initiation and propagation of the tensile cracks were inhibited by the confining pressure. An increase in confining pressure had no obvious effects on the initiation time and the propagation rates of the shear cracks but mainly affected the numbers of shear cracks.
Numerical Simulations on Cracking Behavior of Rock-Like Specimens with Single Flaws under Conditions of Uniaxial and Biaxial Compressions
The expanded distinct element method based on a strain strength criterion was applied herein with the aim of analyzing and comparing the cracking behaviors of rock-like specimens with single flaws under uniaxial and biaxial compressions. The cracking characteristics in uniaxial and biaxial compressions were compared and the effects of confining pressure on the tensile/shear behaviors were analyzed. The confining pressure obviously changed the boundary condition and the cracking behaviors in biaxial compression. The initiation stress, the peak strength, and the number of shear cracks in biaxial compression were obviously larger than in uniaxial compression. The confining pressure affected the initiation and propagation of the secondary cracks, the failure mechanisms, and the distribution of horizontal displacement fields in a large extent. The initiation and propagation of the tensile cracks were inhibited by the confining pressure. An increase in confining pressure had no obvious effects on the initiation time and the propagation rates of the shear cracks but mainly affected the numbers of shear cracks.
Numerical Simulations on Cracking Behavior of Rock-Like Specimens with Single Flaws under Conditions of Uniaxial and Biaxial Compressions
Zhao, Cheng (author) / Niu, Jialun (author) / Zhang, Qingzhao (author) / Yu, Songbo (author) / Morita, Chihiro (author)
2019-09-30
Article (Journal)
Electronic Resource
Unknown
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Failure characteristics of rock-like materials with single flaws under uniaxial compression
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Failure characteristics of rock-like materials with single flaws under uniaxial compression
| Online Contents | 2018