材料自然环境试验数据工程化应用方法探讨

目的研究探讨材料自然环境试验数据在装备设计选材和寿命预测方面的工程化应用方法。方法通过分析材料自然环境试验数据与装备实际使用状态的符合性原则,利用肖维奈准则和子样变异系数法对暴露于海南万宁的2A12铝合金抗拉强度试验数据进行处理。采用环境效应修正系数C-t曲线初步评价2A12铝合金在某型飞机上的工程应用情况及使用寿命。结果 2A12铝合金海洋大气环境下最终的使用年限为36年,满足在海洋大气环境服役使用要求,同时满足一般军用飞机最长30年日历寿命要求,可将2A12铝合金应用于机身、机翼上翼面、平尾、垂尾等机体主要部位。结论该方法初步实现了材料自然环境试验数据在某型飞机上的工程化应用。

Discussion on Engineering Application Method of the Natural Environment Test Data of Material

Objective The engineering application method of the natural environment test data of material in design material selection and life prediction of equipment was discussed. Methods The conformity principle of the natural environment test data of material and the actual state of equipment was analyzed. The tensile strength test data of 2A12 aluminum alloy exposed in Hainan Wanning was processed using Chauvenet criterion and sample variation coefficient method. The engineering application and service life of 2A12 aluminum alloy on a certain aircraft were evaluated by the environmental effect correction coefficient C-t curve. Results The final service life of 2A12 aluminum alloy in marine atmosphere is 36 years. Which meet the requirements of service in the marine atmospheric environment and the general requirements of the 30 year calendar life of military aircraft. 2A12 aluminum alloy can be applied to the main parts of the airframe of the fuselage, wing wing, tail,dying, etc. Conclusion The engineering application of the natural environment test data of material on a certain aircraft was initially realized by this method.