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Broadband Dispersion Behaviors of Wedge Waves Propagating Along Large-Angled Wedges

Published online by Cambridge University Press:  05 May 2011

C.-H. Yang  and
K.-Y. Tsai
C.-H. Yang*
Affiliation:
Department of Mechanical Engineering, Chang Gung University, Taoyuan, Taiwan 333, R.O.C.
K.-Y. Tsai*
Affiliation:
Department of Mechanical Engineering, Chang Gung University, Taoyuan, Taiwan 333, R.O.C.
*
* Professor
** Graduate student
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Abstract

Broadband dispersion behaviors of wedge waves traveling along large-angled wedges are investigated with a laser ultrasound technique. Wedge waves are guided acoustic waves propagating along wedge tips. Until now, no elasticity-based close-form solution is available for the prediction of dispersion behavior of wedge waves. By assuming the wedge as a thin plate with variable thickness, McKenna obtained a theoretical approximation for the prediction of dispersion relation of truncated wedges within limited apex angle and bandwidth. The current research provides experimental data on wideband dispersion spectra of wedge waves traveling along large-angled wedges. It is found that the thin plate theory is accurate only within a small wavenumber regime. Also, a limiting behavior in the large wavenumber regime the ASF dispersion spectra are found to approach the Rayleigh wave speed.

Keywords

Wedge waveDispersionLarge-angledLaser ultrasound technique
Type
Articles
Information
Journal of Mechanics , Volume 21 , Issue 4 , December 2005 , pp. 243 - 247
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2005

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References

1.Lagasse, P. E., “Analysis of a Dispersion Free Guide for Elastic Waves,” Electron. Lett., 8, pp. 372–373 (1972).Google Scholar
2.Lagasse, P. E., Mason, I. M. and Ash, E. A., “Acoustic Surface Waveguides-Analysis and Assessment,” IEEE Trans. Sonics and Ultrasonics, SU-20(2), pp. 143–154 (1973).Google Scholar
3.McKenna, J., Boyd, G. D. and Thurston, R. N., “Plate Theory Solution for Guided Flexural Acoustic Waves Acoustic Waves Along the Tip of a Wedge,” IEEE Trans. Sonics and Ultrasonics, SU-21(3), pp. 178–186 (1974).Google Scholar
4.Krylov, V. V. and Shanin, A. V., “Influence of Elastic Anisotropy on the Velocities of Acoustic Wedge Modes,” Sov. Phys. Acoust, 37(1), pp. 65–67 (1991).Google Scholar
5.Krylov, V. V. and Parker, D. F., “Harmonic Generation and Parametric Mixing in Wedge Acoustic waves,” Wave Motion, 15, pp. 185–200 (1992).Google Scholar
6.Krylov, V. V., “Propagation of Wedge Acoustic Waves Along Wedges Imbedded in Water,” IEEE Ultrasonics Symposium, pp. 793–796 (1994).Google Scholar
7.Krylov, V. V., “On the Velocities of Localized Vibration Modes in Immersed Solid Wedges,” J. Acoust. Soc. Am., 103(2), pp. 767–770 (1998).CrossRefGoogle Scholar
8.Chamuel, J. R., “Edge Waves Along Immersed Elliptical Wedge with Range Dependent Apex Angle,” IEEE Ultrasonics Symposium, pp. 313–318 (1993).Google Scholar
9.Chamuel, J. R., “Contactless Characterization of Antisymmetric Edge Wave Dispersion Along Truncated Wedge using Electromagnetic Acoustic Transducer,” J. Acoust. Soc. Am., 95(5), p. 2893 (1994).Google Scholar
10.Chamuel, J. R., “Flexural Edge Waves Along Free and Immersed Elastic Waveguides,” Review of the Progress in QNDE, 16, pp. 129–136 (1997).Google Scholar
11.Jia, X., Auribault, D., de Billy, M. and Quentin, G., “Laser Generated Flexural Acoustic Waves Traveling Along the Tip of a Wedge,” IEEE Ultrasonics Symposium, pp. 637–640 (1993).Google Scholar
12.Jia, X. and de Billy, M., “Observation of the Dispersion Behavior of Surface Acoustic Waves in a Wedge Waveguide by Laser Ultrasonics,” Appl. Phys. Lett., 61(25), pp. 2970–2972 (1992).Google Scholar
13.Yang, C.-H. and Liaw, J. S., “Observation of Dispersion Behavior of Acoustic Wedge Waves Propagating Along the Tip of a Circular Wedge with Laser Ultrasonics,” Jpn. J. Appl. Phys., 39(5 A), pp. 2741–2743 (2000).Google Scholar
14.Alleyne, D. N. and Cawley, P., “A 2-Dimensional Fourier Transform Method for the Measurement of Propagating Multi-Mode Signals,” J. Acoust. Soc. Am., 89, pp. 1159–1168 (1991).Google Scholar