| 摘要 |
<p>A cylindrical impact absorbing member (1) that absorbs impact energy by plastically deforming in a bellows shape when an axial compression load has been received and is formed using a steel plate having a tensile strength of at least 590 MPa. In this impact absorbing member (1): a cross sectional shape orthogonal to the axial direction has a substantially cross shaped closed cross section having 12 apexes and an angle (a) is set within the range of 120°=a=150° said angle (a) being formed by straight lines that join apexes at both ends of an oblique side of an octagon formed by connecting using straight lines 8 of the 12 apexes to an apex therebetween; the aspect ratio for the cross sectional shape is set between 1:1 to 2:1; and the ratio between the length of the longer side out of the vertical side and the horizontal side of the octagon and the length of the oblique side thereof is set between 1:1 and 1.5:1.</p> |
