A zero-point effective notch stress method is proposed to predict the fatigue limit of notched plates. The effective stress is the sum of the structural hot-spot stress and the notch hot-spot stress, which are obtained by stress linearization of the overall stress and the non-linear peak stress at a characteristic length d₀, respectively. A good agreement with experimental data in the literature can be achieved by the zero-point effective notch stress. The geometry dependence and mesh sensitivity of the proposed method are discussed. Comparing with the TCD, the proposed method can achieve identical prediction accuracy and is only geometry-dependent.

中文翻译：

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基于零点有效缺口应力法的缺口板疲劳极限预测

提出了一种零点有效缺口应力法来预测缺口板的疲劳极限。有效应力是结构热点应力和缺口热点应力的总和，分别通过对特征长度d ₀处的总应力和非线性峰值应力进行应力线性化得到。零点有效缺口应力可以与文献中的实验数据很好地吻合。讨论了所提出方法的几何依赖性和网格敏感性。与 TCD 相比，所提出的方法可以达到相同的预测精度，并且仅与几何相关。