Shuping Zhang, Yu Cao, Wenfeng Yang, Yan Cai, Wenwen Liu, Dehua Zhu, Huan Zhang. Effects of Surface Silane Modification and Laser Machining Microbarb Structure on Performance of Aluminum Alloy-CFRP Adhesive Joint[J]. Chinese Journal of Lasers, 2023, 50(12): 1202203
- Chinese Journal of Lasers
- Vol. 50, Issue 12, 1202203 (2023)
Fig. 1. Schematics of laser and optical path. (a) Physical picture of laser; (b) schematic of laser optical path
Fig. 2. Schematics of barb array parameters and fabrication process. (a) Structure of barb array; (b) schematic of barb array parameters; (c) schematics of barb array fabrication process
Fig. 3. Schematics of gluing process. (a) Laser treatment; (b) application of silane coupling agent; (c) application of adhesive; (d) pressurized bonding; (e) addition of gaskets
Fig. 4. 3D morphologies of barb array structure. (a) Macroscopic 3D morphology of barb structure on aluminum alloy surface; (b) macroscopic 3D morphology of barb structure on CFRP surface; (c) 3D microstructure of aluminum alloy barb structure; (d) 3D microstructure of CFRP barb structure
Fig. 5. Cross-sectional views of adhesive joint. (a) Cross section of barb array joint; (b) cross section of joint after sandpaper roughening; (c) cross section of untreated joint
Fig. 6. XPS images of fracture interface of aluminum alloy. (a) Al2p and (b) O1s spectra without silane coupling agent modification; (c) Al2p and (d) O1s spectra after silane coupling agent modification
Fig. 7. Schematic of joint strength
Fig. 8. Fracture diagrams of adhesive joints under different treatment methods. (a) No treatment; (b) sandpaper treatment; (c) only laser treatment; (d) silane coupling agent modification and laser treatment
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Table 1. Barb structure shape parameters
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Table 2. Laser parameters used to produce barb arrays on aluminum and CFRP surfaces
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