Eur. Phys. J. Appl. Phys.
Volume 37, Number 2, February 2007
|Page(s)||223 - 228|
|Section||Physics and Mechanics of Fluids, Microfluidics|
|Published online||24 January 2007|
Guided ultrasonic propagation in the tri-layer structures. Application to the reconstruction of their material properties from dispersion curves
Laboratory of Acoustics and Vibration, Department of Physics,
Faculty of sciences, BP 20, El Jadida, Morocco
Corresponding author: email@example.com
Revised: 6 October 2007
Accepted: 30 October 2006
Published online: 24 January 2007
This paper deals with the guided ultrasonic propagation in the tri-layer structures. The propagation model and the procedure used to determine the dispersion curves and the displacement field in the structure are those presented earlier in B. Bougaze et al. [Eur. Phys. J. Appl. Phys. 32, 207 (2005)] and tested for the case of (aluminium/adhesive/aluminium) structure. Here, we consider the case of a tri-layer structure presenting two different adherents: copper and steel. We adjusted our programs for this case and determined the dispersion curves and the displacement field in the structure. The obtained dispersion curves are then used to reconstruct the material properties of the tri-layer structure via a proposed numerical inverse method based on an optimization process. These material properties include the longitudinal and shear wave velocities as well as the density of each layer of the structure. The agreement between the reconstructed and the exact material properties is very well demonstrating the efficiency of the proposed numerical inverse method.
PACS: 68.60.Bs – Mechanical and acoustical properties / 43.20.Mv – Waveguides, wave propagation in tubes and ducts
© EDP Sciences, 2007
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