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Proceedings Paper

Crack detection in fastener holes using surface acoustic wave
Author(s): Xiao-Qi Bao; Vasundara V. Varadan; Vijay K. Varadan
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Paper Abstract

This paper presents an investigation of the monitoring of cracks at the edge of fastener holes on plates using an ultrasonic pulse-echo technique. Our studies show that, if the surface of the plate surrounding the hold is free, an acoustic wave on the surface of the plate is able to detect the cracks located in an arc of 60 degree(s). When the inner surface of the hole is free, surface acoustic waves on the inner surface are alternate choices. For the case when all these surfaces are in tight contact with other parts, hence unavailable for mounting transducers, a particular type of Lamb wave mode is presented.

Paper Details

Date Published: 8 May 1995
PDF: 7 pages
Proc. SPIE 2443, Smart Structures and Materials 1995: Smart Structures and Integrated Systems, (8 May 1995); doi: 10.1117/12.208269
Show Author Affiliations
Xiao-Qi Bao, The Pennsylvania State Univ. (United States)
Vasundara V. Varadan, The Pennsylvania State Univ. (United States)
Vijay K. Varadan, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 2443:
Smart Structures and Materials 1995: Smart Structures and Integrated Systems
Inderjit Chopra, Editor(s)

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