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Three-dimensional numerical study on the failure characteristics of intermittent fissures under compressive-shear loads |
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| Authors: | Wang Yun-Teng Zhou Xiao-Ping Kou Miao-Miao |
| Institution: | 1.School of Civil Engineering, Wuhan University, Wuhan, 430072, People’s Republic of China ;2.School of Civil Engineering, Chongqing University, Chongqing, 400045, People’s Republic of China ;3.Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing, 400045, People’s Republic of China ;4.State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400045, People’s Republic of China ; |
| Abstract: | A 3-D conjugated bond-pair-based peridynamic model is developed to comprehensively investigate failure characteristics of rock-like materials with intermittent fissures in the compressive-shear loading tests. Rock-like specimens containing one single central fissure are first simulated. Numerical results indicate that the 3-D conjugated bond-pair-based peridynamic model can faithfully reproduce failure characteristics of rock-like materials under compressive-shear loads. Then, the failure characteristics of rock-like specimens containing two parallel central intermittent fissures are numerically investigated. Effects of fissure inclination angle, fissure ligament length and rock bridge angle on fracturing behaviors, such as crack coalescence patterns, are also studied as well as crack initiation stress and coalescence stress. |
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