Strain fatigue and stress fatigue are related by the influence coefficient of strain distribution.
通过应变分布影响系数把应变疲劳与应力疲劳联系起来。
Stress index method and fatigue strength weakened coefficient method are important methods for designing fatigue vessel.
应力指数法和疲劳强度减弱系数法是进行疲劳容器设计的重要方法。
The pre-straining prolonged the fatigue crack initiation life, and increased resistance coefficient and equivalent stress threshold of the fatigue crack initiation.
预应变可以延长疲劳裂纹形成寿命，提高疲劳裂纹形成的抗力系数和裂纹形成的当量应力门槛值；
Then the effect of Stress Concentration and the Stress Gradient were introduced into the prediction of fatigue life through Correction Coefficient of Stress with the wider suitable life scope.
通过应力修正系数对危险点最大应力进行修正，将应力集中和应力梯度效应引入到寿命的估算中，因而扩大了传统的应力寿命法可适用的寿命范围。
Then the effect of Stress Concentration and the Stress Gradient were introduced into the prediction of fatigue life through Correction Coefficient of Stress with the wider suitable life scope.
通过应力修正系数对危险点最大应力进行修正，将应力集中和应力梯度效应引入到寿命的估算中，因而扩大了传统的应力寿命法可适用的寿命范围。
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