Abstract
The existence of inherent microcracks in granite makes accurately describing crack propagation and fracture behaviors challenging, which is crucial in engineering applications. We found that the crack propagation was competitively affected by the geometry of the flaw and inherent microcracks. During the process of semi-circular bending, the width of the fracture process zone was influenced by the inherent microcracks, whereas the length was not. The existence of inherent microcracks broadened the fracture process zone and increased its influence scope. The fracture process zone and isolated strain concentration caused by inherent microcracks coalesced to form a continuous fracture path. Additionally, the fracture toughness with size dependence was discussed using the data obtained from simulation.
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