PMID: 16529119Mar 15, 2006Paper

Determination of lamb wave dispersion data in lossy anisotropic plates using time domain finite element analysis. Part I: theory and experimental verification

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Gordon Hayward, Jamie Hyslop

Abstract

A theoretical and experimental approach for extraction of guided wave dispersion data in plate structures is described. Finite element modeling is used to calculate the surface displacement data (in-plane and out-of-plane) when the plate is subject to either symmetrical or antisymmetrical impulsive force stimulation at one or both of the parallel faces. Fourier transformation of the resultant space-time displacement histories is then employed to obtain phase velocity as a function of frequency. Experimental verification in the case of antisymmetrical stimulation is provided by means of a high-power Q-switched laser source that is used to excite guided waves in the plate. The subsequent out-of-plane displacement data were then obtained by means of a scanning laser vibrometer, and good agreement between theory and experiment is demonstrated. Examples of dispersion data are provided for aluminum, and excellent correlation between the data sets and conventional Rayleigh-Lamb theory for plate structures was obtained. This was then extended to lossy polymeric plates, in addition to both unpolarized and polarized piezoelectric ceramic plates, again with good agreement between the finite element modeling and optical experiments. The la...Continue Reading

References

May 2, 2000·The Journal of the Acoustical Society of America·G BennyR Chapman
Sep 24, 2002·The Journal of the Acoustical Society of America·Mikaël WilmThomas Pastureaud
Nov 24, 2004·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Stephen P KellyTomás E Gómez Alvarez-Arenas

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Citations

Jul 20, 2010·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Florian ThalmayrMasatsune Yamaguchi

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