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Proceedings Paper

Thermography detection of damage initiation during fatigue tests
Author(s): Jean-Claude Krapez; Didier Pacou
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Paper Abstract

The design of mechanical structures that are subject to repeated loads relies upon the knowledge of the fatigue limit of the constitutive materials. Conventional methods for the fatigue limit evaluation are lengthy and therefore expensive. We propose a new approach for this problem. It is based on the detection of a modification of the thermomechanical couplings occurring together with the damage onset. A specific synchronous demodulation thermography approach was devised which provides a map of the two first harmonics of temperature and a map of the temperature mean rise. Experiments performed on steel XC48, 316L and on Al 7010, Al 2024 show the high potential of this method.

Paper Details

Date Published: 15 March 2002
PDF: 15 pages
Proc. SPIE 4710, Thermosense XXIV, (15 March 2002); doi: 10.1117/12.459593
Show Author Affiliations
Jean-Claude Krapez, ONERA (France)
Didier Pacou, ONERA (France)

Published in SPIE Proceedings Vol. 4710:
Thermosense XXIV
Xavier P. Maldague; Andres E. Rozlosnik, Editor(s)

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