Effect of surface cold ablation on shear strength of CFRP adhesively bonded joint after UV laser treatment |
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| Affiliation: | 1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China;2. Advanced Composites Center R&D Department, Shanghai Aircraft Manufacturing Co., Ltd., Shanghai, 201324, China;1. Aviation Materials Research and Development Laboratory, Faculty of Aeronautics and Astronautics, Kocaeli University, Kocaeli 41285, Turkey;2. Electro Optic System Engineering, Kocaeli University, Kocaeli 41380, Turkey;3. Department of Physics, Kocaeli University, Kocaeli 41380, Turkey;4. BEAM Ar-Ge Optics, Laser and Spectroscopy, KOU Technopark, Kocaeli 41275, Turkey;1. Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino, FR 03043, Italy;2. Department of Engineering, Roma Tre University, Roma 00146, Italy;3. Department of Structures in Engineering and Architecture, University of Naples Federico II, Naples 80125, Italy;1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;2. College of Information Science and Engineering, Changsha Normal University, Changsha 410100, China;1. Institute of Production Engineering and Laser Technology, Vienna University of Technology, Vienna, Austria;2. Department of Aerospace Engineering, Indian Institute of Science, 560012 Bengaluru, India |
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| Abstract: | Ultraviolet(UV) laser treatment on the surface of the carbon fiber reinforced polymer (CFRP) laminate becomes an effective method to benefit the bonding strength of adhesively bonded joint in aerospace industries. In the present research, homomorphic CFRP laminates with different resin distribution on the surface are bonded into single-lap joints. Their shear strengths are tested to evaluate the effect of surface resin distribution on bonding mechanical performance. The different resin distributions on the surface of CFRP laminate are obtained by UV pulse laser with different laser scanning speeds. The scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) are conducted to analyze the laser treated surfaces and fracture surfaces of tested joints. The experimental results indicate that the residual resin of CFRP surface increases with the increase of scanning speed. Compared with both the reference surface without laser pre-treatment and that with no-residual resin for bonding, the surface with partial residual resin results in an enhancement of the shear strength of bonded joint. Moreover, the shear strength of the reference sample is higher than that bonded by the surface with no-residual resin. The research lays foundation for understanding the relationship between surface resin distribution and bonding strength. |
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| Keywords: | Ultraviolet laser treatment Carbon fiber reinforced polymer Adhesively bonded joint Shear strength |
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