Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
To create a sustainable society, efforts are being made to reduce CO2 emissions from transportation equipment, including automobiles. To improve fuel/electric efficiency, lightweight structures with high strength and stiffness are desired. Specifically, to enhance stiffness, rather than adding members that increase mass, an approach involves focusing on joints where stress is likely to concentrate and re-evaluating the structure and number of joints. We have investigated the stiffness of bolted joints and have shown that the joint area could be a parameter affecting stiffness. Since spot welding is the primary joining method in automobiles and the use of adhesive bonding has been increasing, we compared the shear tensile stiffness of bolted joints, spot welded joints, and adhesive bonded joints. As a result, we found that there is a qualitative proportional relationship between stiffness and joint area regardless of the joining method. However, it was also found that joint area alone cannot fully explain the stiffness.
