Attenuation of Lamb waves in the vicinity of a forbidden band in a phononic crystal.
Identifieur interne : 000B45 ( Main/Curation ); précédent : 000B44; suivant : 000B46Attenuation of Lamb waves in the vicinity of a forbidden band in a phononic crystal.
Auteurs : Maxime Bavencoffe [France] ; Anne-Christine Hladky-Hennion ; Bruno Morvan ; Jean-Louis IzbickiSource :
- IEEE transactions on ultrasonics, ferroelectrics, and frequency control [ 1525-8955 ] ; 2009.
Abstract
When a Lamb wave propagates on a plate engraved by a periodic grating, it may exhibit attenuation. This attenuation is related to a coupling of this incident mode with other propagating modes. As the propagation takes place in a periodic medium, the dispersion curves of the modes are of interest because they exhibit passbands and stopbands related to the geometry of the waveguide. The goal of this work is to quantitatively establish the relation between the value of the attenuation of the propagating waves and the width of the forbidden bands appearing inside the Brillouin zone. This study is performed by using a finite element method (ATILA code).
DOI: 10.1109/TUFFC.2009.1272
PubMed: 19811999
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