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

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posted on 2023-08-30, 15:57 authored by Saber Chahardoli, Ali Alavi Nia, Mehrdad Asadi
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.

History

Refereed

  • Yes

Volume

137

Page range

53-66

Publication title

Thin-Walled Structures

ISSN

0263-8231

Publisher

Elsevier

File version

  • Accepted version

Language

  • eng

Legacy posted date

2019-01-18

Legacy creation date

2019-01-17

Legacy Faculty/School/Department

Faculty of Science & Engineering

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