Effects of different design and lightweight material on energy distribution and collision characteristics for hot-formed B-pillar using finite element simulation

Ebru Barut, A. Eker, Orçun Yöntem
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Abstract

In line with international environmental policies and efforts to reduce carbon emissions, the number of electric vehicles also shows a sharp increase. This increase is aimed at reducing energy use, vehicle lightening, and increasing passenger safety by leading vehicle manufacturers to use new generation materials. However, the use of newly developed materials in the automotive industry takes a long time, and the developments in the field of materials and vehicle technologies are progressing at different speeds. In this study; the B-pillar part of a B-segment car was analyzed with HPF2000 material instead of the current HPF1500 material using the finite element method. The designs prepared as two different options were simulated with Ls-Dyna according to EuroNCAP side impact test standards. As a result of the simulations, the effects of different design and material variables on energy absorption, collision characteristics, and lightness were examined. It was seen that the energy absorbed by the part increased by 2.9% thanks to the new material and design. Specific energy absorption, another feature indicating the collision characteristic, increased by 11.81%. The total weight of the part decreased by 9.7% with using new generation material. In summary; With the use of new generation high-strength hot-formed steels in vehicle parts, besides the vehicle’s lightness, the mechanical properties have improved the collision characteristics and vehicle safety has also increased.
利用有限元模拟不同设计和轻质材料对热成型 B 柱能量分布和碰撞特性的影响
随着国际环保政策和减少碳排放的努力,电动汽车的数量也出现了大幅增长。这一增长旨在减少能源消耗、实现汽车轻量化和提高乘客安全,从而引导汽车制造商使用新一代材料。然而,在汽车行业使用新开发的材料需要很长的时间,材料领域和汽车技术领域的发展速度也不尽相同。在本研究中,使用有限元方法分析了一辆 B 级车的 B 柱部分,用 HPF2000 材料代替了当前的 HPF1500 材料。根据 EuroNCAP 侧面碰撞测试标准,使用 Ls-Dyna 模拟了两种不同方案的设计。模拟结果表明,不同的设计和材料变量对能量吸收、碰撞特性和车身轻量化的影响。结果表明,由于采用了新材料和新设计,部件吸收的能量增加了 2.9%。表示碰撞特性的另一个特征--比能量吸收增加了 11.81%。使用新一代材料后,零件的总重量减少了 9.7%。总之,随着新一代高强度热成型钢在汽车零部件中的使用,除了使汽车轻量化外,其机械性能还改善了碰撞特性,提高了汽车的安全性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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