Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Effect of Bonding Surface Laser Patterns on Interfacial Toughness of GFRP/Al Composite

GFRP/Al 복합재료의 접합부 레이저 패턴이 계면인성에 미치는 영향

  • Woo Yong Sim (Department of Safety Engineering, Pukyong National University) ;
  • Yu Seong Yun (JM Eco Co., Ltd.) ;
  • Oh Heon Kwon (Department of Safety Engineering, Pukyong National University)
  • Received : 2023.01.17
  • Accepted : 2023.04.19
  • Published : 2023.04.30
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Abstract

Fiber-metal laminates (FMLs) and polymer matrix composites (PMCs) are formed in various ways. In particular, FMLs in which aluminum is laminated as a reinforced layer are widely used. Also, glass fiber-reinforced plastics (GFRPs) are generally applied as fiber laminates. The bonding interface layer between the aluminum and fiber laminate exhibits low strength when subjected to hot press fabrication in the event of delamination fracture at the interface. This study presents a simple method for strengthening the interface bonding between the aluminum metal and GFRP layer of FML composites. The surfaces of the aluminum interface layer are engraved with three kinds of patterns by using the laser machine before the hot press works. Furthermore, the effect of the laser patterns on the interfacial toughness is investigated. The interfacial toughness was evaluated by the energy release rate (G) using an asymmetric double cantilever bending specimen (ADCB). From the experimental results, it was shown that the strip type pattern (STP) has the most proper pattern shape in GFRP/Al FML composites. Therefore, this will be considered a useful method for the safety assessment of FML composite structures.

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References

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