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用有限元和Ｊ积分相结合的方法，确定飞力轮试验盘裂纹尖端参量随裂纹尺寸的变化规律，并根据材料的断裂韧性确定临界裂纹长度。最后算出裂纹疲劳扩展寿命。计算结果与试验结果基本一致。提供的分析方法及计算程序在进行轮盘损伤容限设计分析方面有积极的参考价值
The finite element and J integral method are combined to determine the variation law of crack tip parameters of flywheel test disk with the crack size, and the critical crack length is determined according to the fracture toughness of the material. Finally calculate the crack fatigue life extension. The calculated results are in good agreement with the experimental results. The analysis methods and calculation programs provided have a positive reference value in the design analysis of the damage tolerance of roulette