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Proceedings Paper

Electronic shearography for inspecting steel bridges: a feasibility study
Author(s): Arup K. Maji; Debashis Satpathi; S. Zawaydeh
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Paper Abstract

Although a large number of nondestructive techniques based on laser interferometry have been developed over the last few decades, most of them are incapable of handling large structures. Shearography has shown potential as a full field nondestructive technique, capable of being used on large structures like bridges. The method however has been beset with the problem of poor fringe quality, and as any other interferometric technique, suffers from the problem of speckle de-correlation due to rigid body motions. This paper investigates the effect of rigid body motion on fringe visibility with an emphasis on applications in nondestructive testing of bridges. To this effect, a finite element and fracture mechanics analysis is carried out on a real bridge to identify the constraints on shearography in full scale structural testing.

Paper Details

Date Published: 1 March 1994
PDF: 10 pages
Proc. SPIE 2004, Interferometry VI: Applications, (1 March 1994); doi: 10.1117/12.172596
Show Author Affiliations
Arup K. Maji, Univ. of New Mexico (United States)
Debashis Satpathi, Univ. of New Mexico (United States)
S. Zawaydeh, Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 2004:
Interferometry VI: Applications
Ryszard J. Pryputniewicz; Gordon M. Brown; Werner P. O. Jueptner, Editor(s)

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