Numerical predictions and experiments on the free-plate edge mode

Emmanuel Le Clezio; Mihai Valentin Predoi; Michel Castaings; Bernard Hosten; Martine Rousseau

doi:10.1016/s0041-624x(02)00391-8

Numerical predictions and experiments on the free-plate edge mode

Ultrasonics. 2003 Jan;41(1):25-40. doi: 10.1016/s0041-624x(02)00391-8.

Authors

Emmanuel Le Clezio¹, Mihai Valentin Predoi, Michel Castaings, Bernard Hosten, Martine Rousseau

Affiliation

¹ Laboratoire de Mécanique Physique, Université Bordeaux 1, UMR CNRS 5469 351, Cours de la Libération, 33405 Talence Cedex, France. e.leclezio@lmp.u-bordeaux.fr

PMID: 12464410
DOI: 10.1016/s0041-624x(02)00391-8

Abstract

In this paper, te edge mode variation is studied with three different methods: the reciprocal work method, already used by Torvik [J. Acoust. Soc. Am. 41 (1967) 346] to model this phenomenon, the S-parameter method and a finite element model that are applied for the first time to the study of the edge resonance. Moreover, laser probe measurements of the edge mode have also been performed and compared to the numerical predictions. The good agreement between the numerical predictions and the experimental data allows full understanding of the resonant phenomenon. The edge resonance is linked to the strong increase in amplitude of two complex Lamb waves, and the edge mode is proved to radiate into the plate as the first symmetrical Lamb mode S(0). Displacements at the edge and away from the edge have been computed and measured to evaluate the spatial and temporal behaviour of the edge mode. The dependence of the edge resonance frequency and amplitude on the Poisson coefficient has also been studied.