CFRP/Al胶接接头形貌特征对连接性能影响

为解决汽车轻量化设计与制造中的异质材料间的连接问题，基于内聚力模型模型，对碳纤维增强复合材料（CFRP）/铝合金单搭接胶接接头，建立了接头有限元分析模型，并对有限元模型的有效性进行了试验验证.构建了3种具有不同形貌特征的CFRP/Al胶接接头结构方案，以单向拉伸载荷下的极限破坏载荷和破坏吸能量作为性能指标.结果表明:相对于普通单搭接接头，弧形接头破坏载荷和吸能量分别降低11.3%和9.88%；矩形槽接头失效载荷虽有所降低，但由于能更有效地发挥胶层中部区域的作用，在接头吸能特性方面有较大提升，接头抗冲击性能提升了91.63%. 

The Effect of Morphology Characteristics of CFRP/Al Single Lap Joints on Bonding Properties

The multi-material structures is one of the effective technical approaches to realize vehicle weight reduction, and the technical difficulty is the connection between heterogeneous materials. For the CFRP/Al single-lap joints, based on the cohesive force model, one finite element analysis model was established, and the effectiveness of the finite element model was verified through experiments. Three CFRP/Al adhesive joints with different morphological features were constructed, and the ultimate failure load and failure energy absorption under uniaxial tensile load were used as performance indicators. The results show that compared with the ordinary single lap joints, the arc joint damage load and energy absorption are reduced by 11.3% and 9.88%, respectively. Although the failure load of rectangular slot joints has been reduced, but due to the more effective use of the middle region of the adhesive layer, the joint energy absorption characteristics have been greatly improved, and the joint impact resistance performance has increased by 91.63%.