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本文用弹塑性有限元方法,证实了硬夹软不均匀裂纹体J 积分的路径无关性及能量率表达式J=-1/B(?)的适用性。研究了简化为软夹层中含裂纹的硬夹软不均匀体的低匹配焊接接头力学性能不均匀性对断裂表征参量J 积分的影响规律。
In this paper, by means of the elasto-plastic finite element method, the path independence of J-integral of an inhomogeneous hard crack and the applicability of the energy rate expression J = -1 / B (?) Are verified. The influence of mechanical properties inhomogeneity on J-integral of fracture characterization was studied.