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Received: 2005-03-01

Revision Accepted: 2005-04-05

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Journal of Zhejiang University SCIENCE A 2005 Vol.6 No.9 P.945~949

http://doi.org/10.1631/jzus.2005.A0945


Inverse method for the determination of elastic properties of coating layers by the surface ultrasonic waves


Author(s):  CHANG Jun, YANG Zhen, XU Jin-quan

Affiliation(s):  School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China

Corresponding email(s):   changjun@sjtu.edu.cn

Key Words:  Coating layers, Surface waves, Dispersive equation, Inverse algorithm


CHANG Jun, YANG Zhen, XU Jin-quan. Inverse method for the determination of elastic properties of coating layers by the surface ultrasonic waves[J]. Journal of Zhejiang University Science A, 2005, 6(9): 945~949.

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author="CHANG Jun, YANG Zhen, XU Jin-quan",
journal="Journal of Zhejiang University Science A",
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pages="945~949",
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doi="10.1631/jzus.2005.A0945"
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%T Inverse method for the determination of elastic properties of coating layers by the surface ultrasonic waves
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%A XU Jin-quan
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%D 2005
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2005.A0945

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T1 - Inverse method for the determination of elastic properties of coating layers by the surface ultrasonic waves
A1 - CHANG Jun
A1 - YANG Zhen
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J0 - Journal of Zhejiang University Science A
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SP - 945
EP - 949
%@ 1673-565X
Y1 - 2005
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2005.A0945


Abstract: 
As the coated materials are widely applied in engineering, estimation of the elastic properties of coating layers is of great practical importance. This paper presents an inversion algorithm for determining the elastic properties of coating layers from the given velocity dispersion of surface ultrasonic waves. Based on the dispersive equation of surface waves in layered half space, an objective function dependent on coating material parameters is introduced. The density and wave velocities, which make the object function minimum, are taken as the inversion results. Inverse analyses of two parameters (longitudinal and transverse velocities) and three parameters (the density, longitudinal and transverse velocities) of the coating layer were made.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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[7] Windels, F.W., Vanaverbeke, S., Leroy, O., 2001. Thin coating characterization by Rayleigh waves: An analytical model based on normal-mode theory. J. Acoust. Soc. Am., 110(3):1349-1359.

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[9] Wu, T.T., Liu, Y.H., 1999. Inverse determinations of thickness and elastic properties of a bonding layer using laser-generated surface waves. Ultrasonics, 37:23-30.

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