DocumentCode :
2980165
Title :
Nondestructive evaluation of adhesive joints in layered structures using nonlinear measurements of second harmonics of ultrasonic Lamb waves
Author :
Deng, Mingxi ; Wang, Ping ; Lv, Xiafu
Author_Institution :
Chongqing Univ. of Posts & Telecommun. & Logistics Eng. Univ., China
Volume :
3
fYear :
2004
fDate :
23-27 Aug. 2004
Firstpage :
2291
Abstract :
Based on nonlinear measurements of the second harmonics of ultrasonic Lamb waves, this work develops a promising method for NDE of the properties of adhesive joints in layered planar structures. When ultrasonic Lamb waves have a strong nonlinearity, the measurements of amplitude-frequency curves for the second harmonics of Lamb waves at the surfaces of the given layered planar structures (aluminum sheet-epoxy-aluminum sheet) have been carried out. It is verified that there is no overlapping of multi-modes of the double frequency Lamb waves in the received signals. Experimental results show that both the stress wave factors of the nonlinear Lamb waves and the frequency values corresponding to the peaks of the amplitude-frequency curves of the second-harmonic signals can effectively characterize the properties of the adhesive joints.
Keywords :
composite materials; harmonics; inhomogeneous media; nonlinear acoustics; surface acoustic waves; ultrasonic materials testing; Al; adhesive joints; aluminum-epoxy-aluminum; amplitude-frequency curves; layered structures; nondestructive evaluation; nonlinear measurements; stress wave factors; ultrasonic Lamb wave second harmonics; Aluminum; Automation; Dispersion; Frequency; Joining materials; Logistics; Manufacturing; Stress; Surface waves; Ultrasonic variables measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Ultrasonics Symposium, 2004 IEEE
ISSN :
1051-0117
Print_ISBN :
0-7803-8412-1
Type :
conf
DOI :
10.1109/ULTSYM.2004.1418298
Filename :
1418298
Link To Document :
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