Abstract

In this article, a new double-tapered rectangular tube (DTRT) with diaphragms is introduced as an energy absorber. The material tensile test and impact test were performed to verify the finite element model (FEM) of the tube. Based on the FEM, the Box–Behnken design (BBD) was applied to study the effects of diaphragm geometry on energy absorption (EA) and specific energy absorption (SEA). The weld length between the diaphragm and tube wall has positive effects on the EA and SEA of the DTRT, whereas the hole size on the diaphragms has negative effects. The optimal solution improved the EA and SEA by 12.01% and 9.29%, respectively. The conclusions of this study are based on engineering practice and are expected to aid engineers in designing the diaphragms of tubes as energy-absorbing structures.

摘要

在本文中，介绍了一种带有隔膜的新型双锥形矩形管 (DTRT) 作为能量吸收器。进行材料拉伸试验和冲击试验以验证管的有限元模型（FEM）。基于有限元法，Box-Behnken 设计 (BBD) 被应用于研究隔膜几何形状对能量吸收 (EA) 和比能量吸收 (SEA) 的影响。隔膜和管壁之间的焊缝长度对 DTRT 的 EA 和 SEA 有积极影响，而隔膜上的孔尺寸有负面影响。最优解将 EA 和 SEA 分别提高了 12.01% 和 9.29%。本研究的结论基于工程实践，有望帮助工程师将管膜设计为吸能结构。