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CFRP-Aluminum 이종소재의 Self-Piercing Rivet 접합
전남기(Nam-Ki Jeon),이세헌(Sehun Rhee),감동혁(Dong-Hyuck Kam) 대한용접·접합학회 2018 대한용접·접합학회지 Vol.36 No.3
In response to the environmental regulations and market forces for fuel economy, automotive industry has continued trying to apply lightweight multi-materials for weight reduction. Carbon fiber reinforced plastics (CFRP) is one of the most attractive structural materials because of its high strength to weight ratio. CFRP-metal dissimilar joints are inevitable to realize a variety of CFRP-metal hybrid designs. However, conventional fusion joining methods for metals are not applicable to CFRP-metal dissimilar joints. In this study, considering the process productivity and the joint reliability, self-piercing rivet (SPR) is investigated to join CFRP and aluminum panels. The SPR joint quality such as head height, interlock, bottom thickness is considered to find an optimal combination of the processing parameters, which include rivet, die, and punch force. In the tensile lap shear test of CFRP-aluminum SPR joints, the first fracture load is found to be a better parameter for representing the joint quality over the max fracture load because of the discontinuous property of CFRP panel. The first fracture load achieved in this study is up to 4.4 kN for SPR lap joint with 1.8 mm thickness CFRP upper and 2.0 mm Al5083-O lower.