Crushing analysis and multiobjective crashworthiness optimization of foam-filled ellipse tubes under oblique impact loading
Crushing analysis and multiobjective crashworthiness optimization of foam-filled ellipse tubes under oblique impact loading
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DOI：
10.1016/j.tws.2015.11.020
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发表时间：
2016-03-01
影响因子：
6.4
通讯作者：
Wang, Chenzhi
中科院分区：
文献类型：
--
作者：
Gao, Qiang;Wang, Liangmo;Wang, Chenzhi
本文提出了一种新型的泡沫填充椭圆管（FET），并与其他不同截面的空心管和泡沫填充椭圆管在多个加载角度下进行了比较，包括方形、圆形和矩形。首先，这些管的有限元分析表明，FET管具有最好的耐撞性在多个加载角度。其次，采用实验设计方法对径向速度f、壁厚t和泡沫密度ρ（f）进行了分析。第三，非支配排序遗传算法（NSGA-II）被用来优化FET管，其中最佳的参数变化是寻求最大的比能量吸收（SEA）和最小的峰值挤压力（PCF）在多个加载角度。优化后的场效应管比原场效应管和其他不同截面的管具有更好的耐撞性，这表明场效应管可以成为潜在的能量吸收器，特别是在斜向冲击载荷下。(C)2015爱思唯尔有限公司版权所有。
In this paper, a novel foam-filled ellipse tube (FET) is proposed and compared with other hollow and foam-filled tubes with different cross-sections under multiple loading angles, which include square, circle and rectangle. First, finite element analyses of these tubes reveal that the FET tube has the best crashworthiness under multiple loading angles. Second, design of experiments (DOE) was used to analyze the parameters that radial rate f, thickness of wall t and foam density rho(f). Third, the Non-dominated Sorting Genetic Algorithm (NSGA-II) is used to optimize the FET tube, in which the optimal parameter variation is sought for maximizing specific energy absorption (SEA) and minimizing peak crush force (PCF) under multiple loading angles. The optimized FET tube exhibits better crashworthiness than the origin FET tube and other tubes with different cross-section, indicating that the FET tube can be a potential energy absorber especially under oblique impact loading. (C) 2015 Elsevier Ltd. All rights reserved.