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Advances in Optical Technologies
Volume 2012 (2012), Article ID 765953, 6 pages
Research Article

Porosity and Inclusion Detection in CFRP by Infrared Thermography

1C.I.R.A. Italian Aerospace Research Centre, via Maiorise snc, 81043 Capua, Italy
2Department of Aerospace Engineering, University of Naples Federico II, 80125 Naples, Italy
3Department of Aerospace Engineering (DIAS), University of Naples Federico II, Via Claudio, 21 80125 Naples, Italy
4Department of Aerospace Engineering (DIAS), University of Naples Federico II, P.le Tecchio, 21 80125 Naples, Italy

Received 6 August 2012; Accepted 22 October 2012

Academic Editor: Laura Abbozzo Ronchi

Copyright © 2012 C. Toscano 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.


The ever wide use of composite materials in the aeronautical industry has evidenced the need for development of ever more effective nondestructive evaluation methodologies in order to reduce rejected parts and to optimize production costs. Infrared thermography has been recently enclosed amongst the standardized non destructive testing techniques, but its usefulness needs still complete assessment since it can be employed in several different arrangements and for many purposes. In this work, the possibility to detect slag inclusions and porosity is analyzed with both lock-in themography and pulse thermography in the transmission mode. To this end, carbon-fiber-peinforced polymers different specimens are specifically fabricated of several different stacking sequences and with embedded slag inclusions and porosity percentages. As main results, both of the techniques are found definitely able to reveal the presence of the defects above mentioned. Moreover, these techniques could be considered complementary in order to better characterize the nature of the detected defects.