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The accuracy of acoustic birefringence shear wave measurements in sheet metal

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Dixon, S., Fletcher, M. P. and Rowlands, G. (George). (2008) The accuracy of acoustic birefringence shear wave measurements in sheet metal. Journal of Applied Physics, Vol.104 (No.11). p. 114901. ISSN 0021-8979

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Official URL: http://dx.doi.org/10.1063/1.3033395

Abstract

In rolled metal sheet the through thickness shear wave energy is steered into two orthogonal polarizations, parallel and perpendicular to the sheet's rolling direction. Ultrasonic velocity measurements used to determine the orientation distribution coefficients in thin sheets can be obtained from the fast Fourier transform of the time domain signal. It is observed that the data obtained using a linearly polarized electromagnetic acoustic transducer (EMAT) do not correspond with that obtained using a radially polarized EMAT. An analytical model has been developed, which explains the source of this effect from the using the fast Fourier transform.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Engineering Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Sheet-metal -- Mathematical models, Shear waves -- Mathematical models, Refraction, Double -- Mathematical models
Journal or Publication Title:	Journal of Applied Physics
Publisher:	American Institute of Physics
ISSN:	0021-8979
Official Date:	1 December 2008
Volume:	Vol.104
Number:	No.11
Number of Pages:	5
Page Range:	p. 114901
Identification Number:	10.1063/1.3033395
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
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URI:	http://wrap.warwick.ac.uk/id/eprint/28717