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ON THE CONCEPT OF FATIGUE NOTCH FACTOR

机译：关于疲劳缺口因子的概念

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Numerous theoretical models have been developed to predict the fatigue notch factor (also known as the fatigue strength reduction factor); an important parameter in the fatigue life prediction of notched components. These models include: the classical average stress method, the fracture mechanics method, the stress field intensity method, the strain energy method, and the weakest link method. This paper gives a detailed literature review of these methods. It also discusses a recently developed probabilistic method for microstructure-sensitive fatigue notch factor. The probabilistic method provides a very strong physical basis for fatigue strength reduction and the associated notch sensitivity; thus it can be used to determine the effect of notches on reduction of fatigue resistance in a way that directly incorporates microstructure. The results obtained using the new probabilistic framework and other conventional methods are compared with experimental data for notched components.
机译：已经开发了许多理论模型来预测疲劳缺口因子（也称为疲劳强度降低因子）。缺口零件疲劳寿命预测中的重要参数。这些模型包括：经典平均应力法，断裂力学法，应力场强度法，应变能法和最弱连接法。本文对这些方法进行了详细的文献综述。它还讨论了微结构敏感性疲劳缺口因子的最新开发的概率方法。概率方法为降低疲劳强度和相关的缺口敏感性提供了非常强大的物理基础。因此，它可以用来直接确定微观结构，从而确定缺口对降低疲劳强度的影响。将使用新的概率框架和其他常规方法获得的结果与带缺口部件的实验数据进行比较。

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