Abstract

In this work, crash characteristics of side door reinforced beams under low speed impact were investigated. The side door panels of three different cross-sections, namely, circular, U and W shapes were considered. The advanced high strength (AHS) steel grade 1000 was used and both quasi-static and dynamic tensile tests were carried out for obtaining the rate-dependent flow stress behaviour. The geometries of all panels were modified with a specified design space constraint. FE simulations of profile variants under lateral impact load were carried out and resulting peak forces and maximum intrusions were afterwards determined. The most effective geometrical parameters for enhancing impact resistance of each reinforced beam were identified. The Wshape panel exhibited the greatest compromise of increasing crushing force efficiency, potential of weight reduction and minimizing structural damage. Finally, side door beams with combined best configurations were proposed and their crashworthiness including normalized specific energy absorptions were compared.

摘要

在这项工作中，研究了低速冲击下侧门加强梁的碰撞特性。考虑了三种不同截面的侧门板，即圆形、U 形和 W 形。使用高级高强度 (AHS) 钢级 1000，并进行准静态和动态拉伸试验以获得速率相关的流变应力行为。所有面板的几何形状都根据指定的设计空间约束进行了修改。对横向冲击载荷下的型材变体进行了有限元模拟，随后确定了由此产生的峰值力和最大侵入量。确定了增强每个加固梁抗冲击性的最有效几何参数。Wshape 面板在提高破碎力效率方面表现出最大的妥协，减轻重量和最大限度地减少结构损坏的潜力。最后，提出了具有组合最佳配置的侧门梁，并比较了它们的耐撞性，包括归一化比能量吸收。