Abstract

The bumper beams mounted on the front or rear of the vehicles should act as an energy absorber in slight collisions and prevent the other parts to be damaged. In most crashes the bumper beam deforms in bending mode, so strengthening this hollow thin walled structure with internal stiffeners (ribs) against this type of loading is the aim of this study. Several aluminum beams with rectangular cross-section and different types of stiffeners were fabricated and tested under quasi static three-point bending loads. The peak and average bending force and the energy absorption capacity were the parameters that measured during the tests and used to evaluate the flexural properties of the beams. The results indicate that the beam with a vertical and two oblique ribs had the most resistance to bending and also absorbed more energy than others. Also, numerical simulation of the tests was carried out using LS-DYNA software.

摘要

安装在车辆前部或后部的保险杠横梁应在轻微碰撞时起到吸收能量的作用，并防止损坏其他部件。在大多数碰撞中，保险杠梁在弯曲模式下变形，因此本研究的目的是加强这种带有内部加强筋（肋）的空心薄壁结构以抵抗这种类型的载荷。在准静态三点弯曲载荷下制造并测试了几根矩形截面铝梁和不同类型的加强筋。峰值和平均弯曲力以及能量吸收能力是在测试过程中测量的参数，用于评估梁的弯曲特性。结果表明，具有垂直和两个斜肋的梁具有最大的弯曲阻力，并且吸收的能量也比其他梁多。还，