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Journal of Nondestructive Evaluation

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01-09-2018

Air-Coupled Nondestructive Evaluation Dissected

Authors: Mohammad Said Harb, Fuh-Gwo Yuan

Published in: Journal of Nondestructive Evaluation | Issue 3/2018

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Abstract

This work develops a two-dimensional theoretical model to simulate the behavior of a fully non-contact air-coupled nondestructive evaluation system for a thin isotropic plate. The model is divided into transmission, guided wave propagation and reception phase. The validation of the complete model was carried out by modeling the same system by means of finite element method using a Multiphysics software. In addition, the dependency of the generated Lamb waves on different transmitter’s parameters and incidence angle is thoroughly investigated. The results of the acoustic pressure excited by the transducer, the out-of-plane velocity amplitudes for the generated first antisymmetric Lamb wave mode, and the radiated pressure from the plate caused by the leaky Lamb wavefield were all compared between the two models and a reasonable degree of similarity was found.

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Title: Air-Coupled Nondestructive Evaluation Dissected
Authors: Mohammad Said Harb
Fuh-Gwo Yuan
Publication date: 01-09-2018
Publisher: Springer US
Published in: Journal of Nondestructive Evaluation / Issue 3/2018
Print ISSN: 0195-9298
Electronic ISSN: 1573-4862
DOI: https://doi.org/10.1007/s10921-018-0502-4

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