The article discusses the problem related to estimating fatigue life of elements containing stress concentrators. The algorithm for estimating fatigue life presented in this work uses a fictitious ray based on the Neuber method. The proposed algorithm takes into account the variability of microstructural length, which depends on the number of failure cycles. The function thus obtained can be used to select the appropriate value for this length, which simplifies the calculation procedure needed to estimate fatigue life. In addition, this work includes an analysis of the impact of variable cutout geometry on the value of the support coefficient. As a result, it was possible to extend the application of this concept to lower fatigue life values and to structural elements with different notch geometries. The method was verified by performing experiments using elements made of three steel grades. A good correlation between calculation and experimental results was obtained.

中文翻译：

---

使用虚拟半径的变量值来估计缺口元素的疲劳寿命

本文讨论了与估计包含应力集中器的元素的疲劳寿命有关的问题。这项工作中提出的估算疲劳寿命的算法使用了基于Neuber方法的虚拟射线。所提出的算法考虑了微观结构长度的可变性，该可变性取决于失效周期的数量。这样获得的函数可用于选择适合该长度的值，从而简化了估计疲劳寿命所需的计算过程。此外，这项工作还包括分析可变切口几何形状对支撑系数值的影响。结果，有可能将该概念的应用范围扩展到更低的疲劳寿命值以及具有不同缺口几何形状的结构元件。通过使用三种钢种制成的元件进行实验，验证了该方法。计算与实验结果之间具有良好的相关性。