This work aimed to design an undermatched lap joint that has an equal load-carrying capacity (ELCC) with a traditional equalmatched joint under out-of-plane bending. A weld strength calculation method was proposed based on the similarity of a lap joint and a T joint, as shown using linear elastic finite element (FE) analysis, and then applied in the analysis of a lap joint and the design of an ELCC lap joint. A single lap joint of HQ785 steel was chosen for experimental verification. The bending force limit of the ELCC joint was 93.35% of the theoretical prediction and 96.90% of the traditional equalmatched joint. The results show that the weld strength calculation method and the ELCC design method are reasonable and feasible.

中文翻译：

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平面外弯曲时不匹配的HSLA搭接接头的强度计算和均等承载力设计

这项工作旨在设计一种不匹配的搭接接头，该搭接在平面外弯曲下具有与传统的等匹配接头相同的承载能力（ELCC）。提出了一种基于搭接接头与T形接头相似性的焊接强度计算方法，如使用线性弹性有限元（FE）分析所示，然后将其应用于搭接接头的分析和ELCC搭接接头的设计。 。选择HQ785钢的单搭接接头进行实验验证。ELCC接头的弯曲力极限为理论预测值的93.35％和传统等距接头的96.90％。结果表明，焊接强度计算方法和ELCC设计方法是合理可行的。