AXIAL CRUSHING ENERGY ABSORPTION CAPACITY OF ALUMINUM ALLOY THIN-WALLED MULTI-CORNER TUBES

SUN HongTu; WANG Jian; SHEN GuoZhe; HU Ping

doi:10.16579/j.issn.1001.9669.2018.01.022

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AXIAL CRUSHING ENERGY ABSORPTION CAPACITY OF ALUMINUM ALLOY THIN-WALLED MULTI-CORNER TUBES

更新时间：2022-09-22

- AXIAL CRUSHING ENERGY ABSORPTION CAPACITY OF ALUMINUM ALLOY THIN-WALLED MULTI-CORNER TUBES
- Journal of Mechanical Strength Vol. 40, Issue 1, Pages: 124-129(2018)
- 作者机构：
  
  1. 鲁东大学交通学院
  2. 大连理工大学汽车工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2018.01.022
  CLC：
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SUN HongTu, WANG Jian, SHEN GuoZhe, et al. AXIAL CRUSHING ENERGY ABSORPTION CAPACITY OF ALUMINUM ALLOY THIN-WALLED MULTI-CORNER TUBES. [J]. 40(1):124-129(2018)
DOI：

SUN HongTu, WANG Jian, SHEN GuoZhe, et al. AXIAL CRUSHING ENERGY ABSORPTION CAPACITY OF ALUMINUM ALLOY THIN-WALLED MULTI-CORNER TUBES. [J]. 40(1):124-129(2018) DOI： 10.16579/j.issn.1001.9669.2018.01.022.

摘要

研究了一种薄壁多角管的能量吸收结构,分析对比了相同截面周长、相同材料用量、不同截面结构形式的铝合金薄壁多角管在轴向冲击载荷作用下的能量吸收特性,利用改进的折叠单元方法对薄壁多角管轴向冲击压缩力进行了理论预测,探讨了截面折角对薄壁多角管吸能特性的影响。研究表明,通过截面折角的增加能够提高薄壁管的能量吸收特性,多角管截面折角的数量与折角最短边的长度对吸能特性有重要的影响。在相同材料用量下,折角数量为12的薄壁多角管,最大压缩力效率比方管提高11.6%,但随着截面折角数量的增加使折角最短边的长度减小,薄壁管可能出现整体失稳的现象,吸能特性有所降低。

Abstract

The multi-corner tubes with extra concave corners in cross section were presented to improve energy absorption efficiency of aluminum alloy thin-walled tubes in this paper. The axial crushing energy absorption capacity of square and multicorner aluminum alloy thin-walled tubes was compared with the same cross-sectional perimeter and mass. The improved method of folding element was applied to predict the crushing forces of thin-walled tubes under axial impact. The corners on cross section were discussed for the effect on axial crushing energy absorption capacity of the thin-walled tubes. The results show that the increasing performance of energy absorption of aluminum alloy thin-walled tubes is due to the increasing number of corners on cross section. The number and size of corners both have important effect on the crushing force efficiency of multi-corner tubes.The maximum crushing force efficiency of multi-corner tubes is 11. 6% higher than that of square tubes with the same material consumption of thin-walled tubes. The multi-corner tubes with 12 corners show better energy absorption capacity than the tubes with more corners which could lead to the small size of corners or the unstable deformations. The high axial crushing energy absorption capacity of the multi-corner tubes prefers increasing the corner number and corner size of adjacent sides at the same time.

关键词

薄壁结构轴向冲击能量吸收铝合金有限元

Keywords

Thin-walled structuresAxial impactEnergy absorptionAluminum alloyFinite element

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