| 摘要 |
PROBLEM TO BE SOLVED: To increase impact absorption capacity per unit weight of a door beam made of an aluminum alloy extruded material.SOLUTION: In a door beam including an inner flange 2, an outer flange 3, and a pair of webs 4 and 5 to connect them, the inner flange 2 is 65-100 mm in width Hi and 1.0-5.0 mm in thickness tfi. The height h of a neutral axis 9 on the cross section is in the range of 20-50% of the cross section height W. The length do of a projection part of the outer flange 3, the interval D of the pair of webs 4 and 5, the height dw of the webs, and the thickness tw of the webs satisfy the following relationships: 1<D/do<3.5...(1), and 6<dw/tw<22...(2)SELECTED DRAWING: Figure 1 |
