Evaluation of fatigue lives for civil aircraft structures under corrosive condition
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摘要: 提出了考虑腐蚀环境影响的民机结构疲劳寿命评定方法.根据腐蚀条件下民机结构使用特点,将其使用过程简化为独立的地面停放与空中环境预腐蚀和空中腐蚀疲劳过程,综合考虑上述影响因素,建立腐蚀影响系数曲线,采用疲劳损伤当量折算方法,对一般环境下的疲劳寿命结论进行修正,可以有效地进行腐蚀条件下民机结构疲劳寿命评定.Abstract: A method evaluating fatigue lives for civil aircraft structures under corrosive environment was presented. The service process of civil aircraft structures was simplified to two independent parts: pre-corrosion on the ground and in the air environment, corrosion fatigue in the air. All these effect factors were synthesized then the curve of corrosion influence factor(C) versus time(T) could be built up. Then evaluation of civil aircraft structures fatigue lives under corrosive environment could perform effectively by correcting fatigue life under common environment.
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Key words:
- corrosion /
- corrosion fatigue /
- civil aircraft /
- fatigue life
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