Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2019 - September 11, 2019
In order to improve both the crash safety and the fuel efficiency, various shapes of thin-walled structures have been utilized as energy absorbers of automobiles based on the progressive buckling mechanism. In this study, the dynamic crushing behavior of metal honeycombs was studied with laying emphasis on the effects of strain rate, cell geometry and oblique impact on its energy absorption characteristics. Numerical models of some materials were made by considering the adhesive layer and the initial imperfection, and the strain rate dependence of honeycomb structure on the energy absorption capacity was discussed as compared with the corresponding experimental results. Furthermore, the branch angle of cell geometry and the crush angle were also varied to evaluate their effects. Oblique impact loading causes the transition from axial collapse to bending collapse, so that the mean buckling load at the crush angle of 45° was 30–50% smaller than that at the vertical angle.
