1. The stability of macrocrack in engineering was analyzed based on LEFM(linear elastic fracture mechanics) model;and the crack tip′s stress intensity factor was calculated by displacement direct method.
   基于线弹性断裂力学模型对工程中存在的宏观裂缝进行稳定性分析,采用位移直接法计算缝端应力强度因子。

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