Abstract

In this study, the crashworthiness performance of three homogeneous sheet metal beams (AA6061-T6, AA2024-T351, and DP 800) and six hybrid sheet metal beams designed by combining different combinations of these materials with spot welding were compared under impact loading. Specific energy absorption (SEA) and peak crushing force (PCF) values of the beams that critical crashworthiness indices were compared according to Euro NCAP Full Width Frontal Impact test simulations. ‘Center portion DP 800 and side portion AA2024-T351 hybrid beam’ resulted in the lowest PCF value. Maximum SEA value was obtained with ‘Center portion AA2024-T351 and side portion AA6061-T6 hybrid beam’. Single and multi-objective optimisation studies were carried out to maximise SEA and minimise PCF for this beam. The optimal beam has an advantage over the reference hybrid beam in terms of crashworthiness. So, this beam can be used in the design of vehicle front bumper beams to improve passenger safety.

摘要

在这项研究中，比较了三种均质钣金梁（AA6061-T6、AA2024-T351 和 DP 800）和通过将这些材料的不同组合与点焊相结合而设计的六种混合钣金梁在冲击载荷下的耐撞性能。根据 Euro NCAP 全宽度正面冲击试验模拟比较了梁的特定能量吸收 (SEA) 和峰值压碎力 (PCF) 值，这些值是关键耐撞性指数。“中心部分 DP 800 和侧面部分 AA2024-T351 混合光束”导致 PCF 值最低。使用“中心部分 AA2024-T351 和侧面部分 AA6061-T6 混合梁”获得最大 SEA 值。进行了单目标和多目标优化研究，以使该光束的 SEA 最大化和 PCF 最小化。就耐撞性而言，最佳梁比参考混合梁具有优势。因此，该横梁可用于车辆前保险杠横梁的设计，以提高乘客的安全性。