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The perforation resistance of sandwich structures subjected to low velocity projectile impact loading

Published online by Cambridge University Press:  27 January 2016

J. Zhou ,
Z. W. Guan  and
W. J. Cantwell
J. Zhou
Affiliation:
School of Engineering, University of Liverpool, Liverpool, UK
Z. W. Guan*
Affiliation:
School of Engineering, University of Liverpool, Liverpool, UK
W. J. Cantwell
Affiliation:
Department of Aerospace Engineering, Khalifa University of Science, Technology and Research (KUSTAR), Abu Dhabi, UAE
*
zguan@liverpool.ac.uk
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Abstract

This article presents the findings of a study to investigate the impact perforation resistance of sandwich structures. The dynamic response of sandwich panels based on PVC foam cores has been evaluated by determining the energy to perforate the panels. The impact response of the sandwich structures was predicted using the finite element analysis package Abaqus/Explicit. The validated FE models were also used to investigate the effect of oblique loading and to study the impact response of sandwich panels subjected to a pressure differential equivalent to flying at an altitude of 10,000m.

Low velocity impact testing has shown that the energy to perforate the sandwich panels is dependent on the properties of the core. It has been shown that increasing the density of the crosslinked PVC foams by a factor of two yielded a 600% increase in the perforation resistance of the sandwich structures. At higher densities, the crosslinked foam sandwich structures offered a superior perforation resistance to the linear PVC structures. The numerical analysis accurately predicted the perforation energies of the sandwich panels, as well as the prevailing failure mechanisms following impact. Finally, it has been shown that sandwich panels impacted at high altitude offer a similar perforation resistance to those tested at sea level.

Type
Research Article
Information
The Aeronautical Journal , Volume 116 , Issue 1186 , December 2012 , pp. 1247 - 1262
Copyright
Copyright © Royal Aeronautical Society 2012 

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