Size and shape optimization of aluminum tubes with GFRP honeycomb reinforcements for crashworthy aircraft structures
Size and shape optimization of aluminum tubes with GFRP honeycomb reinforcements for crashworthy aircraft structures
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DOI：
10.1016/j.compstruct.2015.07.077
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发表时间：
2015-12-01
影响因子：
6.3
通讯作者：
Costas, M.
中科院分区：
文献类型：
--
作者：
Paz, J.;Diaz, J.;Costas, M.
飞机和汽车结构的耐撞性优化已成为其各自主导产业的主要研究目标之一。下面的研究提出了一种新的设计飞机的垂直支柱。该设计由一个中空的铝方管与玻璃纤维增强聚合物蜂窝状的内部结构。使用基于尺寸和形状替代的优化技术，以两种材料的厚度、单元尺寸和单元形状作为设计变量。单目标优化选择的目标函数是比能量吸收，而多目标优化的指标是峰值力、质量、吸收能量和比能量吸收。通过显著改变所有设计变量，从单目标优化中获得了22%的具有低峰值力值的比能量吸收的改善。通过多目标优化对抗，得到了两个Pareto前沿，即比吸能对峰值力的影响和质量对吸能的影响。与基线模型相比，优化模型显示出显著的改善，比能量吸收增加了65%或峰值力降低了55%以上。它已被观察到一个重要的影响，细胞的形状对模型的性能。(C)2015爱思唯尔有限公司版权所有。
Crashworthiness optimization of aircraft and automotive structures has become one the main research targets for their respective leading industries. The following research proposes a new design of an aircraft's vertical strut. The design consists of a hollow aluminum square tube with a glass-fiber reinforced polymer honeycomb-shaped inner structure. Size and shape surrogate-based optimization techniques are used, with the thicknesses of both materials, cell size and cell shape as design variables. The objective function chosen for the single-objective optimization is the specific energy absorption, while the metrics for the multi-objective optimization are the peak force, mass, absorbed energy and the specific energy absorption. An improvement of 22% of the specific energy absorption with low peak force values is obtained from the single-objective optimization by significantly changing all design variables. Two Pareto fronts have been obtained from the multi-objective optimization confronting, the specific energy absorption against the peak force and the mass against the energy absorbed. When compared to the baseline model, the optimized models show substantial improvement, increasing the specific energy absorption by 65% or reducing the peak force by over 55%. It has been observed an important effect of the cell shape on the model's performance. (C) 2015 Elsevier Ltd. All rights reserved.