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A new hybrid energy absorption mechanism subjected to axial loading

一种新型的轴向载荷作用下的混合吸能机制

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Abstract

This study aims to introduce a novel hybrid design with a combination of two more common mechanisms for improving the capacity of systems in absorbing the kinetic energy of moving vehicles or devices. This new model consists of two individual mechanisms, i.e., expansion of a circular tube accompanied by crushing of an inner tube, which dissipate the energy through friction, plastic deformations and failures of inner tube. This study comprises 24 case studies surveyed under two different design controls, constant mass and constant volume, for comparing purposes. Finite element simulations are utilized so as to investigate models’ deformations and to extract some crashworthiness parameters in aid of representing the efficiency of the mechanism as well as conducting a parametric study between three different profiles of inner tube. This study shows that models with inner circular and hexagonal tube profile absorb higher amount of energy due to experiencing three different modes of energy dissipation systems, including folding, shear and ductile damages.

摘要

本研究结合两种常见的机制以提高系统吸收移动车辆或设备动能的能力. 该模型由两个独立的机制组成, 即圆管的膨胀和内胎的破碎, 通过内胎的摩擦、塑性变形和失效来耗散能量. 本研究调查 24 个在恒质量和恒体积两种不同设计控制下的案例以进行比较, 利用有限元模拟方法研究了模型的变形, 提取了耐撞性参数, 以反映机制的效率, 并对三种不同的内胎外形进行了参数化研究. 研究表明, 内环型和六角形管型模型由于经历了折叠、剪切和延性损伤三种不同的能量耗散系统, 吸收了更多的能量.

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Abbreviations

F x :

Axial crushing load

F tot :

Total absorbed energy

b :

Width of aluminum rectangular tube

d :

Diameter of aluminum circular tube

M :

Mass of the tubes

V i :

Internal volume of tubes

c :

Side of aluminum hexagonal tube

l :

Length of tubes

CM:

Constant mass design

CV:

Constant volume design

ECT:

Expansion of circular tubes

ACT:

Axial crushing tubes

CMS:

Sample with circular inner tube and constant mass design

HMS:

Sample with hexagonal inner tube and constant mass design

RVS:

Sample with rectangular inner tube and constant volume design

CVS:

Sample with circular inner tube and constant volume design

HVS:

Sample with hexagonal inner tube and constant volume design

RMS:

Sample with rectangular inner tube and constant mass design

SAEM:

Specific absorbed energy under constant mass

SAEV:

Specific absorbed energy under constant volume

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Authors and Affiliations

  1. Department of Mechanical Engineering, TED University, Ankara, Turkey

    Paygozar Bahman

  2. Department of Mechanical Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran

    Saeimi Sadigh Mohammad Ali

Authors
  1. Paygozar Bahman
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  2. Saeimi Sadigh Mohammad Ali
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Correspondence to Paygozar Bahman.

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Bahman, P., Mohammad Ali, S.S. A new hybrid energy absorption mechanism subjected to axial loading. J. Cent. South Univ. 27, 76–87 (2020). https://doi.org/10.1007/s11771-020-4279-0

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  • DOI: https://doi.org/10.1007/s11771-020-4279-0

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