Abstract The fatigue life prediction of adhesive joints still remains a challenging issue. Given the increasing need for safer and more efficient industrial bonded structures, the development of simple fatigue design methodologies is of primordial relevance. In this work, a model based on the S–N approach for the estimation of the fatigue life of single lap adhesive joints with different geometries is proposed. Steel substrates and an epoxy adhesive were considered to manufacture joints with different overlap lengths, adherend thicknesses and widths. The joints were tested under static and fatigue loading conditions. A critical distance approach based on a recently developed effective stress is proposed to deal with the effect of stress concentrations exhibited by this type of joints. The results showed a good correlation between the experimental and the estimated fatigue lives.

中文翻译：

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使用临界距离准则估算单搭接粘接接头的疲劳寿命：等效缺口法

摘要 粘接接头的疲劳寿命预测仍然是一个具有挑战性的问题。鉴于对更安全、更高效的工业粘合结构的需求日益增加，开发简单的疲劳设计方法具有重要意义。在这项工作中，提出了一种基于 S-N 方法的模型，用于估计具有不同几何形状的单搭接胶粘接头的疲劳寿命。钢基材和环氧粘合剂被认为可以制造具有不同重叠长度、被粘物厚度和宽度的接头。接头在静态和疲劳载荷条件下进行了测试。提出了一种基于最近开发的有效应力的临界距离方法来处理此类接头所表现出的应力集中的影响。