Parametric investigation of the mechanical behavior of expanding-folding absorbers and their implementation in sandwich panels core

Chahardoli, Saber and Alavi Nia, Ali and Asadi, Mehrdad (2019) Parametric investigation of the mechanical behavior of expanding-folding absorbers and their implementation in sandwich panels core. Thin-Walled Structures, 137. pp. 53-66. ISSN 0263-8231

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Official URL: https://doi.org/10.1016/j.tws.2019.01.003

Abstract

Thin-walled energy absorbers are one of the common structures that are used in vehicle body for increasing the crashworthiness and consequently decreasing injuries. Investigated new type of thin-walled aluminum matrix and a thin-walled steel punch energy absorber structure has been investigated in this paper. Energy is absorbed as the matrix expansion followed by simultaneous matrix and punch folding. Present study proposes a sandwich panel based on expanding-folding absorber units to evaluate their crush mechanism. Parametric study has been done using finite element code LS-DYNA while experimental tests have been implemented to validate the FE model. The panels have been tested under three axial quasi-static loading conditions including a rigid half-cylinder and a rigid plate. Parametric study considers the punch angle, matrix thickness and punch thickness. The optimum structure based on energy absorption has then been used as a structural member in the sandwich panel until a panel with high specific energy absorption be introduced. Also it have been seen that all the curves for the expansion section can be estimated using polynomial second order functions, with a high accuracy.

Item Type: Journal Article
Keywords: LS-DYNA, Expanding-folding absorber, Sandwich panel, Bumper, Energy absorber
Faculty: Faculty of Science & Technology
SWORD Depositor: Symplectic User
Depositing User: Symplectic User
Date Deposited: 18 Jan 2019 11:50
Last Modified: 12 Feb 2019 15:01
URI: http://arro.anglia.ac.uk/id/eprint/704021

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