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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 |
| 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 |
| References: | 1G.A. Alers, Rev. Prog. Quant. Nondestr. Eval. 18, 1695 (1999). 2R.J. Roe, J. Appl. Phys 36, 2024 (1965). 3M.J.P. Musgrave, Math. and Phys Sci 40, 131 (1985). 4M.J.P. Musgrave, Crystal Acoustics (Holden-Day 1970). 5M.L. Boas, Mathematical Methods In The Physical Sciences (John Wiley & Sons 1983). 6E Schneider, Optics and Lasers in Engineering 22, pp. 305-323 (1995). 7A.V. Clark, Ultrasonics 23, 21, (1985). 8Y. Pao, W. Sachse and H. Fukuoka, Physical Acoustics – Volume XVII (Academic Press 1984). 9CM Sayers, J. Phys. D 15, 2157 (1982). 10H.M. Frost, Physical Acoustics – Volume XIV (Academic Press 1979). 11E.R. Dobbs, Physical Acoustics – Volume X (Academic Press 1973). 12S. Dixon S, C. Edwards and S.B. Palmer, Ultrasonics 39, 445 (2001). 13S. Dixon S, B. Lanyon and G. Rowlands, J. Phys. D: Appl. Phys. 39, 506 (2006). 14M.P. Fletcher and S. Dixon, Rev. Prog. Quant. Nondestr. Eval. 26B, 1244 (2007). |
| URI: | http://wrap.warwick.ac.uk/id/eprint/28717 |
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