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Advances in Materials Science and Engineering
Volume 2013 (2013), Article ID 129864, 10 pages
http://dx.doi.org/10.1155/2013/129864
Research Article

Damage Characterization of Polypropylene Honeycomb Sandwich Panels Subjected to Low-Velocity Impact

1School of Mechanical Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia
2School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia

Received 15 July 2013; Revised 2 October 2013; Accepted 2 October 2013

Academic Editor: John W. Gillespie

Copyright © 2013 Freeda A. Amir et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The post-test deformation and failures of sandwich composites may involve complex interactions between various failure mechanisms. In this study, the extent of impact damages and response of the thermoplastic honeycomb sandwich are analysed through energy profile diagrams and associated load history curves. The degree of the postimpact damages of the sandwich is further characterized using an optical surfaces metrology analysis. The thickness of the honeycomb was found to influence the extent of the damage which occurred following the low-velocity impact. Thicker core was able to sustain a higher load as well as the energy absorption before total failure occurred.