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Proceedings Paper

Characterizing back surface loss of skin thickness and presence of corrosion by time-resolved infrared radiometry
Author(s): Jane W. Maclachlan Spicer; W. D. Kerns; Robert Osiander; John C. Murphy
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Paper Abstract

This paper describes the use of time-resolved infrared radiometry (TRIR) to identify characteristic temperature-time signatures resulting from different subsurface thermal structures in aging aircraft. Central to the TRIR technique is the analysis of the temperature- time signatures at various locations as a step heating pulse is applied to the structure. Of particular interest is determining whether a signature can be identified which discriminates the presence of corrosion product from the simple thinning of the aircraft skin as might occur as a result of a previous repair. A technique is proposed which implements both area and localized heating sources. The area heating source provides one-dimensional heating of the specimen and allows suspect areas to be rapidly detected. A localized heating source is then used to further characterize the suspect regions.

Paper Details

Date Published: 3 December 1993
PDF: 9 pages
Proc. SPIE 2001, Nondestructive Inspection of Aging Aircraft, (3 December 1993); doi: 10.1117/12.163836
Show Author Affiliations
Jane W. Maclachlan Spicer, Johns Hopkins Univ. (United States)
W. D. Kerns, Johns Hopkins Univ. (United States)
Robert Osiander, Johns Hopkins Univ. (United States)
John C. Murphy, Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 2001:
Nondestructive Inspection of Aging Aircraft
Michael T. Valley; Nancy K. Del Grande; Albert S. Kobayashi, Editor(s)

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