一种适用于应力疲劳和应变疲劳的通用寿命模型  

General Life Model Adapted to Both Stress Fatigue and Strain Fatigue

作　　者：赵福星[1] 史海秋[1] 耿中行[1] 

机构地区：[1]空军第一研究所,北京100076

出　　处：《航空动力学报》2003年第1期140-145,共6页Journal of Aerospace Power

摘　　要：本文通过应变分布对寿命的影响函数分析,导出了一种适用于应力疲劳和应变疲劳的通用寿命模型。通过应变分布影响系数把应变疲劳与应力疲劳联系起来。该方法不仅可用于构件从应力疲劳到应变疲劳的各类疲劳寿命预测,还可用于构件的疲劳试验模拟件设计。文中列举了各种典型材料的典型应力集中试件的算例。A general life model adapted to both stress fatigue and strain fatigue is deduced through analyzing the influence function of strain distribution on life. Strain fatigue and stress fatigue are related by the influence coefficient of strain distribution. This method can be applied to designing sample components for fatigue test as well as to forecasting various fatigue life of component from stress fatigue to strain fatigue. Examples of calculating various typical materials with typical stress concentration are listed.

关 键 词：航空推进系统 航天推进系统 疲劳寿命 预测模型 应变分布 

分 类 号：V231.95[航空宇航科学与技术—航空宇航推进理论与工程]