Abstract

In this article, a novel multicell filled tubular structure (MFTS) consisting of a multicell tube (MT) and filled circular tube (FCT) is proposed based on the microstructure of the lady beetle elytron. Systematic crashworthiness studies for MFTS under axial crushing have been performed using Abaqus/Explicit. The numerical results show that the MFTS substantially improves for three important indicators, the specific energy absorption (SEA), initial peak force (F_max) and crush force efficiency (CFE), compared to the sum of the MT and FCT under crushing alone due to the coupling effect. The SEA and CFE values were improved by as much as 62.22% and 80.49%, respectively. The F_max value is reduced by as much as 10.12%. A parametric study was performed and the main and interaction effects were analysed. Finally, the non-dominated sorting genetic algorithm II was used to optimise two different multiobjective problems with no constraints and constraints.

摘要

在本文中，基于瓢虫elytron的微观结构，提出了一种由多细胞管（MT）和填充圆管（FCT）组成的新型多细胞填充管状结构（MFTS）。已使用 Abaqus/Explicit 对轴向破碎下的 MFTS 进行了系统的耐撞性研究。数值结果表明，与单独破碎时的 MT 和 FCT 之和相比， MFTS 在比能量吸收 (SEA)、初始峰值力 ( F _max ) 和破碎力效率 (CFE) 三个重要指标上显着提高到耦合效应。SEA 和 CFE 值分别提高了 62.22% 和 80.49%。F_最大值_价值减少多达 10.12%。进行了参数研究，并分析了主要影响和交互作用。最后，利用非支配排序遗传算法Ⅱ对无约束和无约束的两个不同的多目标问题进行优化。