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为某型航空发动机涡轮盘损伤分析的需要,在涡轮盘材料GH901试件高温拉伸试验、低周疲劳试验、蠕变试验以及疲劳/蠕变交互作用试验基础上,分析Chaboche本构模型特点,基于涡轮盘实际使用中的变幅脉冲循环,将应变幅值记忆项引入Chaboche本构方程;通过已有试验结果,应用量子遗传算法优化得到改进的本构方程各参数。将本构方程计算结果与试验结果对比,证明改进的本构方程是合理的。
In order to analyze the damage of aeroengine turbine disk, based on the high temperature tensile test, low cycle fatigue test, creep test and fatigue / creep interaction test of turbine disk material GH901, the characteristics of Chaboche’s constitutive model are analyzed, Based on the luffing pulse cycle in practical use of turbine disk, the memory term of strain amplitude is introduced into the Chaboche constitutive equation. The parameters of the improved constitutive equation are optimized by using the existing genetic algorithm. Comparing the calculation results of the constitutive equation with the experimental ones, it is proved that the improved constitutive equation is reasonable.