|About this Abstract
||Materials Science & Technology 2019
||Joining of Advanced and Specialty Materials XXI
||A Challenge in Multi-Material Structures with Automotive Metal Fasteners
||Hyun-Ju Choi, Won-Kyung Kang
|On-Site Speaker (Planned)
To meet lightweight construction for vehicle OEMs, many options have been tried out for joining/ bonding multi-material structures with either adhesives or metal fasteners. Among others, mechanical fastening or joining instead of welding is suitable for dissimilar materials. This study provides a recent overview of conventional and advanced joining techniques for multi-material thin sheets. In recent years, we have mainly focused on the dissimilar combination of UHSS[typically 22MnB5]-CFRP with SPR(self-piercing rivets) or FDS(flow drill screws) joints. To verify the suitability of these joints in aggressive environments, joint performance including salt spray testing was evaluated experimentally via tensile test using a single lap joint specimen. Microscopy techniques were used to evaluate the failures of the studied specimens as needed. Fatigue life evaluation until final failure and structural integrity assessments in the joint zone of dissimilar or multi materials mechanically fastened are introduced and discussed.