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根据断裂力学理论,考虑疲劳寿命影响因素的模糊性,将Paris公式和模糊理论相结合,提出一种基于模糊理论的疲劳寿命分析模型.应用有限元分析,得到疲劳破坏危险点和应力幅值.该模型可为疲劳寿命计算分析提供参考.
According to the theory of fracture mechanics and considering the fuzziness of influencing factors of fatigue life, a Paris fatigue model based on fuzzy theory is proposed by combining the Paris formula and fuzzy theory, and the critical point of fatigue damage and stress amplitude are obtained by finite element analysis. The model can provide reference for calculation of fatigue life.