This study aims to predict the failure loads of adhesive double-strap joints (DSJs) with the help of validated finite element (FE) analyses performed in a commercial FE package (ABAQUS/Standard). The damage initiation and propagation in the adhesive was evaluated by a cohesive zone model. The effects of the patch part (i.e. material, length and thickness of the patch) on the failure load of the DSJs joints are investigated. In addition, a stress analysis of the adherends and patch part is performed to provide insights into the stress distribution in the materials, thereby avoiding potential premature or unsuitable failure in the different parts of the joints. It is revealed that the dimensions of the patch can have measurable influences on the failure load and the stress distribution in different parts of the joint which may threaten the suitable performance of the joints. Moreover, the results obtained from the joints with both aluminium and composite straps are almost the same, although considering the weight added to the system, the latter outweighs the other.

这项研究旨在借助在商业有限元分析软件包（ABAQUS / Standard）中进行的有效有限元（FE）分析来预测胶粘双带接头（DSJ）的破坏载荷。通过内聚区模型评估粘合剂中的损伤引发和扩散。研究了补片部分（即补片的材料，长度和厚度）对DSJ接头失效载荷的影响。此外，还对被粘物和补片部分进行了应力分析，以洞悉材料中的应力分布，从而避免了关节不同部位潜在的过早损坏或不合适的损坏。结果表明，补片的尺寸可能会对接头的不同部位的破坏载荷和应力分布产生可测量的影响，这可能会威胁到接头的适当性能。而且，尽管考虑到系统的重量，但铝制和复合材料带的连接处获得的结果几乎相同，后者要胜过另一个。