抄録
In this paper, the cross-sectional shapes of aluminum hollow extrusions which are excellent for energy absorption performance is developed by FEM analysis and experiment. As a result, average compression stress and energy absorption efficiency of crash-box are improved if its average width-thickness ratio is small and the number of sides is enlarged. In order to reduce the rest of crashed amount, it is effective that the connected angle of adjoined sides is enlarged not to pile up the sides.
