根据汽轮机低压叶片所受载荷的特点，建立了一种基于三维有限元法和改进局部应力应变法的叶片疲劳寿命预测模型。
According to the characteristics of loads on blades, a model for estimating fatigue life of blades is presented based on three-dimensional finite element method and improved local strain method.
采用无裂纹缺陷试件进行疲劳试验得到试件的疲劳寿命，同时利用考虑了记忆特性的局部应力应变法对试件的疲劳寿命进行定量分析。
The fatigue life is obtained by using specimens without crack and by a special analysis based on local stress-strain method in which remembrance characteristics are considered.
用局部应力应变法进行疲劳寿命估算，必须使用应变—寿命曲线。
The strain-life curves are essential in order to apply the local stress strain approach for fatigue life prediction.
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