A Numerical Study on the Crack Development Behavior of Rock-Like Material Containing Two Intersecting Flaws

Bing Dai, Ying Chen, Guoyan Zhao, Weizhang Liang and Hao Wu
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Bing Dai: School of Resources Environment and Safety Engineering, University of South China, Hengyang 421000, China
Ying Chen: School of Resources Environment and Safety Engineering, University of South China, Hengyang 421000, China
Guoyan Zhao: School of Resources and Safety Engineering, Central South University, Changsha 410000, China
Weizhang Liang: School of Resources and Safety Engineering, Central South University, Changsha 410000, China
Hao Wu: School of Resources and Safety Engineering, Central South University, Changsha 410000, China

Mathematics, 2019, vol. 7, issue 12, 1-16

Abstract: It is quite often that rocks contain intersecting cracks. Therefore, crack behavior cannot be completely studied by only considering several isolated, single flaws. To investigate the crack behavior of rock or rock-like material containing intersecting flaws under uniaxial loading, numerical simulations were carried out using parallel bonded-particle models containing two intersecting flaws with different inclination angles (varying ?) and different intersection angles (varying ??). The crack propagation processes are analyzed and two typical patterns of linkage are observed between two intersecting flaws: (1) One-tip-linkage that contains three subtypes: Coalescence position near the tip; coalescence position at the flaw, but far away from the tip; coalescence position outside the flaw at a certain distance from the tip; and (2) two-tip-linkage with two subtypes: Straight linkage and arc linkage. The geometries of flaws influence the coalescence type. Moreover, the effects of intersection angle ? and inclination angle ? on the peak stress, the stress of crack initiation, and the stress of crack coalescence are also investigated in detail.

Keywords: crack growth behavior; particle model; intersecting flaws; uniaxial compression (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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