Title :
Characterization of evanescent ultrasonic waves in a band gap of a 1D phononic crystal
Author :
Bavencoffe, Maxime ; Morvan, Bruno ; Izbicki, Jean-Louis ; Hladky-Hennion, Anne-Christine
Author_Institution :
Lab. Ondes et Milieux Complexes, Univ. du Havre, Le Havre, France
Abstract :
This work deals with the propagation of Lamb waves on a plate engraved by a 1D periodic grating. Dispersion curves of the modes exhibit pass bands and stop bands. The aim of this work is to establish a link between the attenuation of the ultrasonic waves observed in the case of a limited grating and the values of the imaginary part of the wave number in a stop band computed for an infinite grating.
Keywords :
dispersion (wave); energy gap; phononic crystals; surface acoustic waves; ultrasonic waves; 1D periodic grating; 1D phononic crystal; Lamb wave propagation; band gap; evanescent ultrasonic waves; infinite grating; limited grating; mode dispersion curves; pass bands; plate engraved by a; stop bands; ultrasonic wave attenuation; wave number imaginary part; Attenuation; Equations; Finite element methods; Frequency; Gratings; Harmonic analysis; Periodic structures; Photonic band gap; Surface waves; Transmission line matrix methods;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5441893
