FUZZY RELIABILITY APPROACH TO PREDICT FATIGUE LIFE OF AIRCRAFT STRUCTURE AND EXPERIMENTAL VALIDATION
The failure process of aircraft structure under corrosive environment is significantly complicated; there are not only random factors but also fuzzy factors. According to the failure mechanism and fracture mechanics, the failure process was divided into three stages, namely pro-corrosion stage, pit growth, short fatigue crack growth and long fatigue crack growth. Based on fuzzy mathematics, a fuzzy reliability model to predict corrosion and corrosion fatigue holistic life of aircraft structure. The dog-bone fatigue specimens were machined from the military retired aircraft skin, which had serviced for more than twenty years at a high temperature, high humidity and high salt fog airport. The specimens were tested in laboratory air with different stress ratio and stress level, and the residual lives were obtained. By comparing test lives with calculating lives, the rationality and feasibility of the model was verified. The results show that they agree with each other to some extent.
TAN Xiaoming MU Zhitao CHEN Yueliang JIN Ping
Aviation Machinery Department, College of Navy Aviation Engineering, Qingdao, China.
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）