BUMPER BEAM

摘要

A bumper beam having increased bending strength achieved with a minimum increase in the weight of the bumper beam. The bumper beam (1) is mounted to the front of a vehicle, extends along a reference line (W), and is provided with a beam body (2) and a reinforcing plate (3). In at least one cross section perpendicular to the reference line (W), the reinforcing plate (3) extends linearly and the beam body (2) includes a pair of protrusions (2t, 2s) protruding, while surrounding an inner space, from the reinforcing plate (3) in a direction intersecting the reinforcing plate (3). If the Young's modulus and the density of the beam body (2) are E st and Á st , respectively, and the Young's modulus and the density of the reinforcing plate (3) are E 2 and Á 2 , respectively, the expression (E st /Á st 3 ) < (E 2 /Á 2 3 ) is satisfied.