Abstract

Bioinspired structure/material has attracted attentions in engineering fields. In this article, a novel sandwich cylinder inspired by shore horsetail is proposed by introducing the double-arrowed auxetic filler. The energy absorption characteristics of the sandwich cylinder are analysed comprehensively and compared to the conventional structure to show its superiority. The effects of the geometric parameters on the energy absorption characteristics are also discussed. It is found that the number of layers and cells for auxetic structures, thickness of beams and thin-walled tubes, and the radius of the inner tube have great effects on the crushing force, energy absorption, initial peak force and specific energy absorption. The sandwich cylinder will be a great energy absorber after designing.

摘要

仿生结构/材料已引起工程领域的关注。在本文中，通过引入双箭头拉胀填料，提出了一种以马尾为灵感的新型夹层圆柱体。对夹层圆柱体的吸能特性进行了综合分析，并与常规结构进行了比较，以显示其优越性。还讨论了几何参数对能量吸收特性的影响。研究发现，拉胀结构的层数和孔数、梁和薄壁管的厚度以及内管的半径对破碎力、吸能、初始峰值力和比吸能有很大影响。设计后的夹层圆柱体将是一个很好的能量吸收器。