Study of the adhesion using high frequency ultrasound

Author

Ouaftouh, M. ; Xu, W.J. ; Ourak, M. ; Nongaillard, B. ; Rouvaen, J.M.

Author_Institution

Lab. d´´Opto-Acousto-Electron, Valenciennes Univ., France

fYear

1991

fDate

8-11 Dec 1991

Firstpage

899

Abstract

The use of high-frequency (50 to 500 MHz) bulk (longitudinal and shear) ultrasonic waves for evaluating the adhesion from the reflection or transmission coefficient at an interface is discussed. The mechanical displacements inside optical transparent materials are measured using a laser probe and the Fresnel coefficients deduced for several representative adhesion defects. This allows for fixing the order of magnitude of the variations in the Fresnel coefficients versus the degree of adhesion. A comparison of these experimental results with those deduced from a theoretical model is reported in order to evaluate the effectiveness of ultrasonic nondestructive testing methods for adhesion studies

Keywords

adhesion; ultrasonic materials testing; 50 to 500 MHz; Fresnel coefficients; adhesion; high frequency ultrasound; longitudinal waves; mechanical displacements; optical transparent materials; reflection coefficient; shear waves; transmission coefficient; ultrasonic nondestructive testing; Adhesives; Displacement measurement; Frequency; Fresnel reflection; Laser modes; Mechanical variables measurement; Optical materials; Optical reflection; Ultrasonic imaging; Ultrasonic variables measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1991. Proceedings., IEEE 1991

Conference_Location

Orlando, FL

Type

conf

DOI

10.1109/ULTSYM.1991.234062

Filename

234062