This paper reports an experimental investigation into mechanical behaviors and failure mechanisms of different joint methods for dissimilar materials, including adhesive joints, rivet joints, and hybrid joints with adhesive and rivet. In this study, a series of quasi-static tensile tests were conducted for different joint methods. The digital image correlation (DIC) technique was used to scrutinize the deformation and failure process in situ in real time. The failure modes were identified through macro-/microscopic analyses. The effects of rivet directions and filling enhancement on the joint behavior were characterized by means of experimental and theoretical methods. The results indicated that the hybrid connection exhibited the best mechanical characteristics among these three types of joints. Importantly, an interactive enhancement effect between the rivet and adhesive was identified in the hybrid joints. It was further found that the filling adhesive in a preformed hole of the substrate could better disperse the stress around it and effectively reduce the stress concentration near the hole edge. This paper provides some new insights into the design of different joint methods for dissimilar materials through a comparative study, which exhibits considerable potential and credibility for applying hybrid joints in engineering practice.

本文对不同材料的不同接头方法的力学行为和破坏机理进行了实验研究，这些方法包括粘合接头，铆钉接头以及带有粘合剂和铆钉的混合接头。在这项研究中，针对不同的连接方法进行了一系列准静态拉伸试验。使用数字图像相关技术（DIC）实时检查变形和破坏过程。通过宏观/微观分析确定了失效模式。通过实验和理论方法表征了铆钉方向和填充增强对接头行为的影响。结果表明，混合连接在这三种类型的接头中表现出最佳的机械特性。重要的，在混合接头中，确定了铆钉和粘合剂之间的交互增强作用。进一步发现，在基板的预成型孔中的填充粘合剂可以更好地分散其周围的应力，并有效地减小孔边缘附近的应力集中。通过对比研究，本文为异种材料的不同连接方法的设计提供了一些新见解，在工程实践中应用混合连接具有巨大的潜力和信誉。