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

被引:16
作者
Liu, Xiaokang [1 ]
Zhu, Hang [1 ]
Xie, Yingxi [1 ]
Xu, Lanying [2 ]
Lin, Na [3 ]
Lu, Longsheng [1 ]
机构
[1] South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510641, Peoples R China
[2] Guangdong Polytech Normal Univ, Sch Mechatron Engn, Guangzhou, Peoples R China
[3] Tianjin Polytech Univ, Sch Mech Engn, Tianjin, Peoples R China
基金
中国国家自然科学基金;
关键词
Laser processing; surface microstructures; CFRP; lap joints; shear strength; METAL-COMPOSITE JOINTS; SURFACE-TREATMENT; THERMOPLASTIC COMPOSITE; JOINING STRENGTH; DIRECT ADHESION;
D O I
10.1177/0731684420973066
中图分类号
TB33 [复合材料];
学科分类号
摘要
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.
引用
收藏
页码:463 / 473
页数:11
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