Modelling the Effect of Lateral Inertia on the Dynamic Response of Aluminium Square Tube Extrusions

Authors

  • O. T. Shitta-Bey Vehicle Safety Research Group, Department of Mechanical Engineering, University of Lagos, Lagos State, NIGERIA
  • A. E. Olorunnisola Vehicle Safety Research Group, Department of Mechanical Engineering, University of Lagos, Lagos State, NIGERIA
  • O. Olatunbosun Vehicle Safety Research Group, Department of Mechanical Engineering, University of Lagos, Lagos State, NIGERIA

Keywords:

Aluminium, Square-Tube, Dynamics, Lateral Inertia, Thickening, Thin-walls

Abstract

Crashworthiness of automotives require the design of crush tubes installed as a frontal structure to absorb energy by deforming plastically during collision. The crushing behaviour of aluminium extrusions modelled as square tubes is investigated under quasi-static and dynamic loading conditions using the non-linear explicit finite element code LS DYNA. Previous works have attributed the dynamic increase of the peak and mean crushing load of aluminium thin-walled structures under axial compression, to inertia effects. Results of our investigation revealed that there is a considerable thickening of the shell side walls before and during progressive folding. This shell thickening is established as the cause of lateral inertia which consequently results in increased crush strength. In addition, a positive correlation was established between the shell thickening and crushing speeds.

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Published

2022-06-30

Issue

Vol. 41 No. 3 (2022): NIGERIAN JOURNAL OF TECHNOLOGY, VOL. 41 NO. 3, MAY 2022

Section

Chemical, Industrial, Materials, Mechanical, Metallurgical, Petroleum & Production Engineering

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Copyright (c) 2022 Nigerian Journal of Technology

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How to Cite

Modelling the Effect of Lateral Inertia on the Dynamic Response of Aluminium Square Tube Extrusions. (2022). Nigerian Journal of Technology, 41(3), 464-475. https://nijotech.com/index.php/nijotech/article/view/2847