【摘要】 研究老龄飞机在腐蚀环境下服役的寿命预测方法。针对飞机不同的停放位置与飞行环境,建立详细的环境模型,并对机体上的腐蚀损伤进行测量与统计分析,得到腐蚀损伤随环境和服役时间演化规律的概率模型。利用有限元方法计算得到受腐蚀损伤结构件的受力分布情况,和裂纹扩展分析软件结合起来进行寿命估算。最后应用此方法对坑蚀和剥蚀对机体结构寿命的影响进行算例分析,预测结果和试验结果符合很好。更多还原

【Abstract】 The life prediction method of aging aircraft served in corrosive environments was investigated.The environment model of aircraft in different aerodrome and flying condition was established.The data values of corrosion damage were measured and statistically analyzed,and then the probabilistic model of corrosion damage evolution was proposed.The FEM(finite element method) was used to calculate the load distribution of aircraft structure subjected corrosion damage,and the results of FEM calculation combined with the software of crack growth analyses,the life cycles were estimated.Using the model proposed by the paper,the effect of pitting corrosion and exfoliation corrosion to life of aircraft structure was analyzed and the predicted results were in good agreement with experimental cycles.更多还原