等幅载荷下的有限寿命疲劳设计方法

The fatigue design method of finite life under loading of coustant amplitude

本文论述了等幅款待下的有限寿命疲劳设计方法，研究了非对称循环下的疲劳寿命估算方法和疲劳强度评价方法，推导出了各种非对称循环下的疲劳强度判据和计算应力表达式。并用4种零件进行疲劳试验．对提出的疲劳强度评价方法的精度和安全性进行了验证。

This paper discussed the fatigue design methodof finite life under loading of constant amplitude,studied theevaluation method of fatigue life and the appraisement methodof fatigue strength under non-symmetrical cycle. It derivedthe criteria of fatigue strength and the expression of stress cal-culation under various kinds of mon-symmetrical cysle. Finallythe accuracy and safety property of the advanced assessmentmethod for fatigue strength have been verified by fatigue testcarried on four kinds of components.