Mechanical Behaviour Of Polymeric Foam Core
At Various Orientation Angles
Author(s)
M. R. M. Rejab, M. S. M. Sani, M. M. Noor, K. Kadirgama,
M. M. Rahman & A. Alias
Abstract
Polymeric foam is widely used as core materials in various applications such as
cushioning, padding, insulating, structural use and buoyancy. This is because of
its ability to provide high bending stiffness tied with lightweight in composite
sandwich construction. The purpose of this paper is to present the behaviour of
polyurethane foam, which is fabricated in various orientation angles. Five
different orientation angles have been studied i.e. 0º, 30º, 45º, 60º and 90º. Three
mechanical tests were performed under tension, compression and shear loads to
investigate the polyurethane foam (PU) behaviour. Electron microscope was
used to capture the microstructure of the specimens before and after the tests.
Comparisons have been made between different orientation angles in fracture
modes and mechanical properties. Deformation and failure occur during foam
crushing are discussed according to experimental evidence. Since the main
application of foam materials are for energy absorption, foam response under
considerable compression has been studied intensively. At angle of 90º, it
permits more localised failure with high-energy absorption and in contrary, 0º
which posses the lowest of energy absorption. Energy absorption for PU foam
material tends to increase when the orientation of angle is increased.
Keywords: polyurethane foam, cell orientation angles, fracture mode.
1 Introduction
Foam materials have a cellular structure with a three-dimensional array of cells
and they are being used increasingly in engineering. Their microscopic cellular
structure determines their superior performance as an energy absorbing materials
Keywords
polyurethane foam, cell orientation angles, fracture mode
Related Book
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