Notch-like defect assessment cannot be done by using classical fracture mechanics (mechanics of cracks). In order to prevent overconservatism, the concepts of notch fracture mechanics, such as notch stress intensity factor or notch energy integral Jρ are generally used for this purpose. A local stress criterion, named volumetric method, defines effective stress. It is used for more advanced assessment when introducing geometry and constraint effects. These effects are taken into account for notch fracture toughness and constraint a modified notch failure-assessment diagram.

中文翻译：

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缺口故障分析

使用经典断裂力学（裂纹力学）无法进行类似缺口的缺陷评估。为了防止过度保守，通常使用缺口断裂力学的概念，例如缺口应力强度因子或缺口能量积分Jρ。称为体积法的局部应力准则定义了有效应力。在引入几何和约束效果时，它用于更高级的评估。这些影响被考虑到缺口断裂韧性并约束修改后的缺口失效评估图。