Open AccessNumerical study of the reflected elastic waves using Rayleigh diffraction integral
Author(s) -
Nadir Maghlaoui,
H. Djelouah,
A. Oudina,
Mohamed Ourak,
Fadila Benmeddour
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/657/1/012014
Subject(s) - rayleigh wave , longitudinal wave , acoustics , mechanical wave , reflection (computer programming) , plane wave , diffraction , love wave , ultrasonic sensor , physics , harmonic , optics , transient (computer programming) , lamb waves , surface wave , wave propagation , computer science , programming language , operating system
In this work, the transient ultrasonic waves radiated by a linear phased array transducer in a liquid then reflected at a liquid solid interface is studied. A model based on the Rayleigh integral is used where the reflection at the plane interface is considered by using the reflection coefficients for harmonic plane waves. The transient field is obtained by an inverse Fourier transform of the harmonic field. The obtained results highlight the different components of the ultrasonic field: the direct and edge waves as well as the longitudinal head waves or leaky Rayleigh waves. The temporal representation of these waves has been analyzed and discussed by the rays’ model. Instantaneous cartographies allowed a clear description of all the waves which appear at the liquid-solid interface. The results have been compared to those obtained by using a finite element method.