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The Scientific World Journal
Volume 2013, Article ID 154984, 8 pages
http://dx.doi.org/10.1155/2013/154984
Research Article

Ultrasonic Characterization of the Fiber-Matrix Interfacial Bond in Aerospace Composites

1Department of Mechanics of Materials and Constructions, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
2Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece

Received 10 April 2013; Accepted 13 June 2013

Academic Editors: K.-M. Chung, E. E. Imrak, and A. F. B. A. Prado

Copyright © 2013 D. G. Aggelis 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 properties of advanced composites rely on the quality of the fiber-matrix bonding. Service-induced damage results in deterioration of bonding quality, seriously compromising the load-bearing capacity of the structure. While traditional methods to assess bonding are destructive, herein a nondestructive methodology based on shear wave reflection is numerically investigated. Reflection relies on the bonding quality and results in discernable changes in the received waveform. The key element is the “interphase” model material with varying stiffness. The study is an example of how computational methods enhance the understanding of delicate features concerning the nondestructive evaluation of materials used in advanced structures.