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Proceedings Paper

Output signal prediction of an open-ended waveguide probe when scanning elliptically shaped cracks in metals
Author(s): Farhad Mazlumi; Hesam Sadeghi; R. Moini
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Paper Abstract

We present a modeling technique for the interaction of an elliptical-shape crack in a metal with an open-ended waveguide. The crack is first modeled by an appropriate number of short rectangular waveguides. The mode-matching technique is then used to calculate the scattering matrix of the new segmented waveguide structure. The probe reflection coefficient of the dominant mode is finally calculated for various positions of the crack in order to predict the probe output signal. To demonstrate the accuracy of the model, we consider cracks of various aspect ratios. The comparison of our results with those obtained using a commercial finite element code validates the model introduced in this paper.

Paper Details

Date Published: 7 June 2002
PDF: 8 pages
Proc. SPIE 4703, Nondestructive Evaluation and Reliability of Micro- and Nanomaterial Systems, (7 June 2002); doi: 10.1117/12.469619
Show Author Affiliations
Farhad Mazlumi, Amirkabir Univ. of Technology (Iran)
Hesam Sadeghi, Amirkabir Univ. of Technology (Iran)
R. Moini, Amirkabir Univ. of Technology (Iran)

Published in SPIE Proceedings Vol. 4703:
Nondestructive Evaluation and Reliability of Micro- and Nanomaterial Systems
Norbert Meyendorf; George Y. Baaklini; Bernd Michel, Editor(s)

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