近几年航空发动机叶片失效分析的统计表明,叶片失效多由离心力叠加异常振动的多轴疲劳载荷引起.总结现有单一载荷加载、双轴载荷加载等多轴疲劳试验方法的优缺点,并分析其在评价航空发动机叶片多轴疲劳时存在的问题.重点介绍目前国际上最新研制的可有效模拟发动机叶片受力状态的拉伸-弯曲振动多轴疲劳试验方法.建议尽快建立适合我国航空发动机叶片的多轴疲劳试验系统.
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