2022 Volume 57 Issue 8 Pages 367-380
In this study, we propose a cylindrical absorber with protrusion (CAP) and its sequential partial bulging plastic forming method. In order to improve the mechanical properties of the cylindrical crash absorber, we proposed a forming method by providing multiple partial protrusions on the side wall of the crash absorber, the initial pick load was reduced and the crash energy absorption performance was improved. In order to form the CAP easily, we put the columnar rubber in the cylindrical tube, and apply pressure to the rubber from both ends of the tube, the CAP can be formed by the swelling force of the rubber. We developed sequential partial bulging forming experimental settings using the rubber, and the forming characteristics and crash energy absorption performance are verified by experiment and numerical analysis.
