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Proceedings Paper

Fatigue Detection Based On The Change Of Laser-Produced Diffraction Patterns
Author(s): Xu Boqin; Li Li; Wu Xiaoping
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Paper Abstract

Fatigue induced damage and crack initiation is certainly one of the most important problems in solid mechanics. Safety consideration for structures ranging from aircraft to nuclear reactor all hinge upon , to a large extent ,the early detection of fatigue induced damages. Thus, it is paramount that effective means be developed that can detect ,or better yet, predict the onset of a fatigue crack. Optical techniques being non-contact methods are ideally suited for such a tast. Indeed a number of techniques aiready exist, e.g. the methods of holographic correlation, speckle pattern correlation, speckle spectrum pattern correlation, speckle spectrum core energy variation, etc . In this paper a new method is given to detect fatigue damage and crack initiation and judge the shape , position and damage level of the damage zone, based on the change of laser-produced diffraction pattern.

Paper Details

Date Published: 15 January 1988
PDF: 5 pages
Proc. SPIE 0673, Holography Applications, (15 January 1988); doi: 10.1117/12.939070
Show Author Affiliations
Xu Boqin, University of Science & Technology of China (China)
Li Li, University of Science & Technology of China (China)
Wu Xiaoping, University of Science & Technology of China (China)

Published in SPIE Proceedings Vol. 0673:
Holography Applications
Jingtang Ke; Ryszard J. Pryputniewicz, Editor(s)

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