Title :
Phase and group velocity in components of Lamb waves in pulses
Author :
Moreno, E. ; Castillo, Maribel ; Acevedo, Pedro
Author_Institution :
DISCA, Univ. Nacional Autonoma de Mexico, Mexico City, Mexico
Abstract :
This paper describes a theoretical and experimental study of the pulse propagation in plates, using Fourier-Laplace transform for the solution of Lame equations. It is shown that a pulse in a plate is formed by three fundamental components with its own dispersion relation. One of these components is the antisymmetrical Lamb wave, which is identified in the experiments.
Keywords :
Fourier transforms; Laplace transforms; surface acoustic waves; ultrasonic dispersion; ultrasonic materials testing; ultrasonic propagation; ultrasonic velocity; Fourier-Laplace transform; Lamb wave components; Lame equations; antisymmetrical Lamb wave; dispersion relation; fundamental components; group velocity; isotropic plates; phase velocity; pulse propagation; Boundary conditions; Dispersion; Elasticity; Fourier transforms; Frequency; Mechanical factors; Partial differential equations; Rheology; Transducers; Viscosity;
Conference_Titel :
Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE
Conference_Location :
Caesars Tahoe, NV
Print_ISBN :
0-7803-5722-1
DOI :
10.1109/ULTSYM.1999.849526
