GFRP/Al 복합재료의 접합부 레이저 패턴이 계면인성에 미치는 영향

• Published in: 한국안전학회지 Vol. 38; no. 2; pp. 1 - 7
• Main Authors: 심우용, Woo Yong Sim, 윤유성, Yu Seong Yun, 권오헌, Oh Heon Kwon
• Format: Journal Article
• Language: Korean
• Published: 한국안전학회 30.04.2023
• Subjects: ADCB; asymmetric double cantilever bending specimen; composite; fiber metal laminates; FMLs; interfacial toughness; laser patterns; specimen; 안전공학; fiber metal laminates (FMLs) composite; interfacial toughness; laser patterns; asymmetric double cantilever bending specimen (ADCB) specimen
• ISSN: 1738-3803; 2383-9953

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.