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Proceedings Paper

Thermal transient thermographic NDT and E of composites
Author(s): Nicolas P. Avdelidis; Darryl P. Almond; A. Dobbinson; B. Hawtin; Clemente Ibarra-Castanedo; Xavier P. Maldague
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Paper Abstract

The necessity for more efficient and cost effective aircraft has led in the development of innovative testing and evaluation techniques. Smart and cost effective methods for evaluating the integrity of aircraft structures are necessary to both reduce manufacturing costs and out of service time of aircraft due to maintenance. Nowadays, thermal non-destructive testing and evaluation (NDT & E) techniques are frequently used in the effective assessment of composites. Such techniques are non-contact; the investigated material is heated or cooled by an external stimulus source (flash lamps, air gun, etc) and the resulting thermal transient at the surface is monitored using an infrared - thermal camera. This paper presents certain applications of thermal transient techniques relating to the investigation of composites. Different features or defects were studied: (i) notches, delaminations and fibre optics under multi-ply composite patching (bonded with FM73 adhesive film to the surface of Al 2024-T3), (ii) drilling induced defects on multi-ply laminates of HEXCEL AS4/8552 carbon fibre composites and (iii) impact damage on carbon fibre reinforced plastic (CFRP) panels and honeycomb sandwich structures (bonded with AF-163-2U.03 adhesive film). The approaches used in this study, provided first-rate results in all cases.

Paper Details

Date Published: 12 April 2004
PDF: 11 pages
Proc. SPIE 5405, Thermosense XXVI, (12 April 2004); doi: 10.1117/12.549901
Show Author Affiliations
Nicolas P. Avdelidis, MIKAT Surveillance Systems (Greece)
Univ. of Bath (United Kingdom)
Darryl P. Almond, Univ. of Bath (United Kingdom)
A. Dobbinson, Univ. of Bath (United Kingdom)
B. Hawtin, Univ. of Bath (United Kingdom)
Clemente Ibarra-Castanedo, Univ. Laval (Canada)
Xavier P. Maldague, Univ. Laval (Canada)

Published in SPIE Proceedings Vol. 5405:
Thermosense XXVI
Douglas D. Burleigh; K. Elliott Cramer; G. Raymond Peacock, Editor(s)

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