Evaluation Of Energy Absorbing Materials
Under Blast Loading
Author(s)
H. Bornstein & K. Ackland
Abstract
Traditional blast protection systems present a hard metallic surface, which acts to
deflect and attenuate the blast loading. However, more recently, lightweight
energy absorbing materials, including cellular materials, are being considered.
These materials reduce the transmitted force by deforming elastically or
plastically under the blast load. In this study, four commercially available energy
absorbing materials were considered for application in blast protection. The
materials considered were aluminium foam, Nomex® honeycomb, Skydex® and
expanded polystyrene. The impulse transmitted by the rear face of experimental
test panels under blast loading was assessed by positioning a mass on the rear
face of each of the four panels, the velocity of which was measured using high
speed imaging. Measurements of the permanent deformation of the rear face of
the panels were also taken. The aluminium foam recorded both the lowest
permanent deformation and impulse transfer to the mass of the materials tested,
making it the most suitable material of those tested for use as an appliqué panel
in this particular scenario. Analysis of the panels suggested that for the particular
experimental setup used, minimal energy was absorbed by plastic deformation or
crushing of the energy absorbing materials. Instead, the permanent deformation
of the panels may be related to the mechanical properties of the materials in the
plane perpendicular to the blast load.
Keywords: energy absorbing materials, blast, blast testing.
Keywords
energy absorbing materials, blast, blast testing
Related Book
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