A reliable strategy to enhance the bonding ability in carbon reinforced aluminum laminates (CARALL) is proposed, which is based on the mechanical interlocking effect generated by the surface slot structure of aluminum alloy enhances the structural interface between fibers/resins and aluminum alloy. The characteristic of slot structure is determined, and the strengthening mechanism of bonding interfaces is revealed. The CARALL samples with slot structure are fabricated via an hot pressing process. The micro texture morphologies, mechanical, interlayer bonding properties under different conditions are studied. The results indicate that forming a slot structure on the aluminum surface is beneficial for improving the interfacial bonding performance. Compared with the non‐slotted structure, the interlayer type II fracture toughness of the slotted structure is increased by 112.99%. The slotted structure can reduce the defects at the interface between the layers and improve the interface bonding force. In this work, the interlaminar shear strength (ILSS) of the slotted structure sample was 27.08% higher than that of the non‐slotted structure sample.Highlights A slotted structure was proposed to solve the problem of insufficient bonding strength. A slotted structure consistent with the direction of adjacent fibers is designed. The interlayer type II fracture toughness of the slotted structure is increased by 112.99%. The final crack propagation of the slotted structure sample is reduced by 40%. The final failure area of the slotted structure sample is reduced by 53.85%.

中文翻译：

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采用槽结构强化碳纤维增强铝层压板的结合界面

提出了一种增强碳增强铝层压板（CARALL）粘合能力的可靠策略，该策略基于铝合金表面槽结构产生的机械互锁效应增强了纤维/树脂与铝合金之间的结构界面。确定了槽结构的特征，揭示了键合界面的强化机制。具有槽结构的CARALL样品是通过热压工艺制造的。研究了不同条件下的微观织构形貌、力学性能、层间结合性能。结果表明，在铝表面形成槽结构有利于提高界面结合性能。与无缝结构相比，缝结构的层间II型断裂韧性提高了112.99%。开槽结构可以减少层间界面缺陷，提高界面结合力。在这项工作中，开缝结构样品的层间剪切强度（ILSS）比非开缝结构样品高27.08%。 为了解决粘接强度不足的问题，提出了开槽结构。 设计了与相邻纤维方向一致的开槽结构。 开缝结构的层间II型断裂韧性提高了112.99%。 开槽结构样品的最终裂纹扩展减少了40%。 开槽结构样品的最终失效面积减少了53.85%。