Influence of single flaw on the failure process and energy mechanics of rock-like material |
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| Affiliation: | 1. School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China;2. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221008, PR China;2. The Key Laboratory of Safety for Geotechnical and Structural Engineering of Hubei Province, Wuhan University, Wuhan 430072, PR China |
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| Abstract: | This paper investigates the influence of a flaw on crack initiation, the failure mode, deformation field and energy mechanism of the rock-like material under uniaxial compression. The results of laboratory test and numerical simulation demonstrate the flaw inclination effect can be classified into three groups: 0–30°, 30–60° and 75–90°. The characteristic stresses increase as the flaw angle increases. The tensile cracks initiate from gentle flaws (α ⩽ 30°) and shear cracks appear at tips of steep flaws (α ⩾ 45°). The input energy, strain energy and dissipation energy of a specimen show approximate increasing trends as the flaw angle increases. |
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| Keywords: | Failure pattern Micro-crack increase Particle deformation field Energy mechanism PFC |
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