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分析了循环Ｊ积分与ＲｉｃｅＪ积分数学形式上的相似性，提出了据应力强度因子手册和利用ＥＰＲＩ弹塑性断裂分析全塑性估算解计算ΔＪ的工程方法。有限元计算结果表明，该方法具有较高的精度。
The similarity between the circular J integral and the mathematical form of RiceJ integral was analyzed. An engineering method for calculating ΔJ based on the stress intensity factor manual and EPRI elastoplastic fracture analysis was proposed. Finite element calculation results show that this method has higher accuracy.