Abstract

This work reports the performance of energy absorbers made in mild-steel and aluminum thin-walled square tubes under quasi-static compression tests. They have circular holes discontinuities laterally drilled on two or four opposing faces of the tube, according to three different distances based on the effective crushing distance, resulting in 23, 36, and 46 mm, as well as two diameters 8 and 12 mm. The tubes are 300 mm in effective length, 50 mm wide, and thickness varies. A substantial variation at performance parameters occurs with wall thickness and material changes. Failure initiators with 12 mm in diameter distant from each other 23 and 36 mm lead to better performance for aluminum and steel absorbers, respectively. Von Mises equivalent stress reaffirms that failure initiator influences stress distribution; consequently, the deformation process and; eigenvalue buckling analysis highlights the relation of buckling effect with the peak force and the stiffness of the tube face.

摘要

这项工作报告了由低碳钢和铝薄壁方管制成的能量吸收器在准静态压缩试验下的性能。它们在管子的两个或四个相对面上横向钻有圆形孔不连续性，根据有效破碎距离的三种不同距离，产生 23、36 和 46 毫米，以及 8 和 12 毫米两种直径。管子的有效长度为 300 毫米，宽 50 毫米，厚度各不相同。随着壁厚和材料的变化，性能参数会发生很大变化。直径为 12 毫米、彼此相距 23 和 36 毫米的失效引发剂分别导致铝和钢吸收器的更好性能。Von Mises 等效应力重申失效引发剂影响应力分布；所以，变形过程；特征值屈曲分析突出了屈曲效应与峰值力和管面刚度的关系。