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本文根据塑性力学滑移线场理论求出C形试样的极限载荷P_L,通过试验找到C形试样的无量纲柔度BEC表达式和加力点间弹塑性位移△表达式,并根据J积分与形变功的关系式提出C形试样的J积分公式。
In this paper, the ultimate load P_L of a C-shaped specimen is calculated according to the theory of plastic mechanics slip line field, and the non-dimensional flexibility BEC expression of the C-shaped specimen and the elastic-plastic displacement △ expression of the C-shaped specimen are found through experiments. According to J integral And the relationship between deformation work proposed C-shaped sample J integral formula.