Experimental Investigation On The Folding Of
Axially Crushed Hexagonal Tubes
Author(s)
M. R. Said, A. A. Mokhtar, A. Alias & A. Ibrahim
Abstract
The objective of this paper is to investigate the folding mechanism of an empty
hexagonal tube made of mild steel with respect to the energy absorption. This
includes the determination of the plastic wavelength, type of deforming mode
and the mean load of the tube subjected to an axial loading. The introduction of
chamfer at one end of the tube is also examined and studied. The comparison
load-displacement curves between experiment and Finite Element Analysis
(FEA) are made. The experimental mean load is also compared with theoretical
analysis. The response of the hexagonal tube subjected to axial loading is
observed through experiments. The formation of plastic fold length is observed
and measured. The mean load and area under the load-displacement curve are
calculated to obtain the energy absorption. By introducing the chamfer at one
end, the deforming pattern can be determined, i.e. in-out chamfer gives a
diamond mode while all-out chamfer gives a concentina mode. The FEA loaddisplacement
curve agrees well with the experiment. However, the predicted
mean load is overestimated, while the equivalent circular cylinder underestimates
the experimental result.
Keywords: energy absorption, hexagonal tubes, triggering, and crushed.
1 Introduction
Energy absorption systems made of thin-walled circular tubes and tube nests
have been given significant attention by researchers for the past few decades. In
particular, the initiation progressive axisymmetric and non-axisymmetrical
Keywords
energy absorption, hexagonal tubes, triggering, and crushed.
Related Book
Other papers in this volume
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