Adhesives are typically used in metal/composite hybrid structures. In this study, a metal/composite hybrid structure was fabricated by bonding. The effect of the surface morphology on the bonding performance of metal/composite hybrid structures was evaluated. The surfaces of the metal bonding area were designed and machined for six different patterns, and several specimens were fabricated. The double-cantilever beam (DCB) test and the single-lap shear test on the metal/composite hybrid specimens were designed to verify the effect of different metal surface morphologies on the properties of the bonded joints. The experimental results indicate that this treatment can markedly improve the fracture toughness, peel strength, and shear strength of the metal/composite bonded joints. Among the specimens, the metal/composite hybrid structure with a ±45° groove structure exhibited the highest strength. Finally, the DCB test and the tensile shear test of the hybrid joint with a ±45°groove structure were simulated, and the nondeterministic method was used to simulate the adhesive layer. The strength and failure modes were consistent with the results of the experiments, thus verifying the feasibility of the simulation and the reinforcement scheme.

粘合剂通常用于金属/复合材料混合结构。在这项研究中，通过键合制造了金属/复合材料混合结构。评估了表面形貌对金属/复合混合结构结合性能的影响。金属结合区的表面被设计和加工成六种不同的图案，并制造了几个试样。设计了对金属/复合材料混合试样的双悬臂梁 (DCB) 试验和单搭接剪切试验，以验证不同金属表面形态对接合接头性能的影响。实验结果表明，这种处理可以显着提高金属/复合材料结合接头的断裂韧性、剥离强度和剪切强度。在标本中，具有±45°凹槽结构的金属/复合混合结构表现出最高的强度。最后，模拟了±45°槽结构混合接头的DCB试验和拉伸剪切试验，并采用非确定性方法模拟胶层。强度和破坏模式与实验结果一致，从而验证了模拟和加固方案的可行性。