Optimization of microstructural morphology via laser processing to enhance the bond strength of Al-CFRP

Optimization of microstructural morphology via laser processing to enhance the bond strength of Al-CFRP
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通过激光加工优化微观结构形态以增强 Al-CFRP 的结合强度

DOI:
10.1177/0731684420973066
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发表时间:
2020-11
影响因子:
3.1
通讯作者:
Longsheng Lu
Longsheng Lu
中科院分区:
材料科学3区
文献类型:
--
作者:
Xiaokang Liu;Hang Zhu;Yingxi Xie;Lanying Xu;Na Lin;Longsheng Lu

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表面功能化微结构是提高金属与碳纤维复合材料(CFRP)结合强度的有效途径。在这项研究中,不同的显微组织形貌组成的两个不同的图案上的铝合金(A7075)表面上产生通过激光加工。实验结果表明,不同的显微组织形态有助于提高搭接接头的剪切强度。这些接头的最大剪切强度几乎是没有显微组织的搭接接头的4倍。此外,研究表明,剪切强度不仅取决于表面粗糙度和接触面积,而且还取决于不同的微观结构的排列。这些结果主要是由于机械联锁和物理粘合的组合。最后,根据搭接接头的粘结机理和断裂行为,提出了相应的力学模型。
Generating surface-functional microstructures is an effective way to enhance the bonding strength of metal and carbon fiber-reinforced polymer (CFRP). In this study, different microstructural morphologies consisting of two different patterns were generated on the aluminum alloy (A7075) surface via laser processing. The experimental results indicated that different microstructural morphologies contribute to the enhancement of the shear strength of lap joints. The maximum shear strength of these joints was almost four times stronger than that of lap joints without the microstructures. In addition, the investigation indicated that the shear strength was not only determined by surface roughness and contact area but also by the arrangement of different microstructures. These results are mainly due to the combination of mechanical interlocking and physical adhesion. Finally, the corresponding mechanical models of Al-CFRP lap joints were proposed according to the bonding mechanisms and fracture behaviors.
通过两步激光表面处理增强碳纤维增强塑料(CFRP)层压板粘合接头的剪切强度
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