The fractal methods are used to describe the tortuous shape of rock fracture cracks, and the theoretical models for fracture toughness of rock with fractal cracks are built.
引入分形几何理论，应用分形方法来描述岩石断裂裂纹的曲折形态，进而建立分形裂纹下的岩石断裂韧性理论模型。
Based on substantial experimental data, the effects of loading rates on the strength, fracture toughness and fragmentation efficiency of rock materials are discussed in this paper.
本文以充分的实验结果为依据，讨论了加载率对岩石材料的强度、断裂韧度和破碎效果的影响。
But the damage and fracture of rock is closely related to each other. And the relationship between strength criterion parameters of rock and fracture toughness of fracture theory is particular.
然而，岩石的破坏和断裂是紧密相联的，岩石强度准则的材料参数和断裂理论的断裂韧度存在特定的方程关系。
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