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Proceedings Paper

Inspection of composite structures using line scanning thermography
Author(s): Obdulia Ley; Manny Butera; Valery Godinez
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Paper Abstract

This work deals with the non destructive analysis of different composite parts and structures using Line Scanning Thermography (LST), a non-contact inspection method based in dynamic thermography. The LST technique provides a quick and efficient methodology to scan wide areas rapidly; the technique has been used on the inspection of composite propellers, sandwich panels, motor case tubes and wind turbine blades, among others. In LST a line heat source is used to thermally excite the surface under study while an infrared detector records the transient surface temperature variation of the heated region. Line Scanning Thermography (LST), has successfully been applied to determine the thickness of metallic plates and to assess boiler tube thinning. In this paper the LST protocols developed for the detection of sub-surface defects in different composite materials commonly used in aerospace applications, plates will be presented. In most cases the thermal images acquired using LST will be compared with ultrasonic c-scans. The fundamentals of LST will be discussed, as well as the limitations of this technique for NDT inspection.

Paper Details

Date Published: 18 May 2012
PDF: 6 pages
Proc. SPIE 8354, Thermosense: Thermal Infrared Applications XXXIV, 835406 (18 May 2012); doi: 10.1117/12.919176
Show Author Affiliations
Obdulia Ley, Mistras Group (United States)
Manny Butera, Mistras Group (United States)
Valery Godinez, Mistras Group (United States)

Published in SPIE Proceedings Vol. 8354:
Thermosense: Thermal Infrared Applications XXXIV
Douglas Burleigh; Gregory R. Stockton, Editor(s)

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