Abstract

Thin-walled tubes are widely used as energy absorption devices because of their excellent crashworthiness. In this paper, a novel tubular configuration with a double-layer sinusoidal corrugated section, namely, a double-layer sinusoidal tube (D-LSCT), is proposed to improve the energy absorption capacities. Quasi-static compression experiments and finite element simulations were used to analyse the axial crushing behaviour and energy absorption performance of the D-LSCTs. The results revealed that the geometric parameters had a significant effect on the crashworthiness of the D-LSCTs and that the D-LSCTs had four deformation modes: ordered progression extensional mode (OPEM), ordered progression inextensional mode (OPIM), inextensional mode (IM) and mushroom mode (MM). OPEM and OPIM were more ideal modes, while the IM and MM were unideal modes. To further improve the deformation stability, D-LSCTs were transformed into a three-layer structure by superimposing a regular polygon tube. Experiments and simulations showed that the improved structural design can indeed stabilise deformation and improve the crashworthiness performance.

摘要

薄壁管因其优异的耐撞性而被广泛用作能量吸收装置。在本文中，提出了一种具有双层正弦波纹截面的新型管状结构，即双层正弦管（D-LSCT），以提高能量吸收能力。准静态压缩实验和有限元模拟用于分析D-LSCT的轴向破碎行为和能量吸收性能。结果表明，几何参数对D-LSCT的耐撞性有显着影响，D-LSCT具有四种变形模式：有序级数伸展模式（OPEM）、有序级数非伸展模式（OPIM）、非伸展模式（IM）。 ) 和蘑菇模式 (MM)。OPEM和OPIM是比较理想的模式，而IM和MM是不理想的模式。为了进一步提高变形稳定性，D-LSCTs通过叠加一个正多边形管转化为三层结构。实验和仿真表明，改进后的结构设计确实可以稳定变形，提高耐撞性能。