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Attenuation of Lamb waves in the vicinity of a forbidden band in a phononic crystal

  • M Bavencoffe
  • A-C Hladky-Hennion
  • B Morvan
  • J-L Izbickil
Part of the Springer Proceedings in Physics book series (SPPHY, volume 128)

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 pass bands and stop bands 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).

Keywords

Dispersion Curve Brillouin Zone Lamb Wave Perfectly Match Layer Poynting Vector 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • M Bavencoffe
    • 1
  • A-C Hladky-Hennion
    • 2
  • B Morvan
    • 1
  • J-L Izbickil
    • 1
  1. 1.Laboratoire Ondes et Milieux Complexes, FRE-3102 CNRS, Groupe Ondes AcoustiquesUniversité du HavreLe HavreFrance
  2. 2.Institut d’Electronique, de Microélectronique et de Nanotechnologie, UMR-8520 CNRSLilleFrance

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