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Energy absorption characteristic of bionic lightweight protective structure with curved tubes under impact loading
Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications ( IF 2.5 ) Pub Date : 2021-07-09 , DOI: 10.1177/14644207211028254
Jianxun Du 1 , Peng Hao 2 , Zhiqiang Xie 3 , Mabao Liu 1
Affiliation  

Reinforcing and toughening materials with light quality in engineered structures remains a challenge. In the biological tissues of numerous animal and plant species, efficient strategies have evolved to construct structures that have excellent mechanical properties. As a kind of biological structure with high-strength fiber, beetle elytron not only provides protection function for beetles, but also makes beetles light enough to obtain good flight ability. Because of these advantages of inner fibrous structure of elytron, the bionic investigation of beetle elytron has gradually become one of the research focuses in civil engineering and automobile anti-collision fields. In the present work, the honeycomb and tubes composed of fiber in the beetle elytra was analyzed, and a variety of bionic thin-walled honeycomb structures with curved hollow tubes were designed and modeled. The energy absorption ability of the bionic honeycomb structures with different types of tubes under impact loading were calculated by finite element software. The internal energy values and collapse processes of bionic structures were compared and analyzed at different crushing displacements. The parameter study, including wall thickness and impact angle, was carried out in the collapse time range from 0 ms to 8 ms. These results could be applied in developing crush-resistant materials in the field of automotive passive safety.



中文翻译:

冲击载荷下弯管仿生轻量化防护结构的吸能特性

在工程结构中增强和增韧质量轻的材料仍然是一个挑战。在众多动植物物种的生物组织中,已经进化出有效的策略来构建具有优异机械性能的结构。甲虫鞘翅作为一种具有高强度纤维的生物结构,不仅为甲虫提供保护功能,而且使甲虫足够轻以获得良好的飞行能力。由于鞘翅内纤维结构的这些优点,甲虫鞘翅的仿生研究逐渐成为土木工程和汽车防撞领域的研究热点之一。在目前的工作中,分析了甲虫鞘翅中由纤维组成的蜂窝和管子,并设计和建模了各种带有弯曲空心管的仿生薄壁蜂窝结构。采用有限元软件计算了不同管型仿生蜂窝结构在冲击载荷下的吸能能力。比较分析了不同破碎位移下仿生结构的内能值和倒塌过程。包括壁厚和冲击角度在内的参数研究是在 0 ms 到 8 ms 的坍塌时间范围内进行的。这些结果可用于开发汽车被动安全领域的抗压材料。比较分析了不同破碎位移下仿生结构的内能值和倒塌过程。包括壁厚和冲击角度在内的参数研究是在 0 ms 到 8 ms 的坍塌时间范围内进行的。这些结果可用于开发汽车被动安全领域的抗压材料。比较分析了不同破碎位移下仿生结构的内能值和倒塌过程。包括壁厚和冲击角度在内的参数研究是在 0 ms 到 8 ms 的坍塌时间范围内进行的。这些结果可用于开发汽车被动安全领域的抗压材料。

更新日期:2021-07-09
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