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Proceedings Paper

Pulsed thermography of ceramic matrix composites
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Paper Abstract

Pulsed thermography is a powerful method for the nondestructive evaluation (NDE) of composite materials since it provides a large field means for detecting subsurface material defects and material variations. The main difficulty in the use of this technique, however, is the processing and interpretation of the acquired thermal image data. This paper examines three methods for processing pulsed thermography results concerning a composite plate with material inserts that simulate delamination type defects. Using the same temporal data set, a specimen is analyzed utilizing peak contrast, peak slope and a newly developed thermal image reconstruction technique. Comparisons are made on a composite panel with differing defect sizes and depths. In addition, results are compared to images gathered using through transmission ultrasonics and microfocus radiography. With subjective manipulation, pulsed thermography was able to show the defects more clearly than either the ultrasonic or radiographic techniques. A discussion of this subjectivity and future directions for automation are provided in an effort to better understand the potential of the method.

Paper Details

Date Published: 18 June 2002
PDF: 11 pages
Proc. SPIE 4704, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Civil Infrastructures, (18 June 2002); doi: 10.1117/12.470713
Show Author Affiliations
Richard E. Martin, Cleveland State Univ. (United States)
Andrew L. Gyekenyesi, Ohio Aerospace Institute and NASA Glenn Research Ctr. (United States)

Published in SPIE Proceedings Vol. 4704:
Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Civil Infrastructures
Andrew L. Gyekenyesi; Steven M. Shepard; Dryver R. Huston; A. Emin Aktan; Peter J. Shull, Editor(s)

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