Effects of random deviations in interface properties on the propagation of ultrasound in thick composites
作者:
Yichi Lu,
Jan D. Achenbach,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1991)
卷期:
Volume 90,
issue 5
页码: 2576-2585
ISSN:0001-4966
年代: 1991
DOI:10.1121/1.402061
出版商: Acoustical Society of America
关键词: ULTRASONIC WAVES;WAVE PROPAGATION;TRANSFER MATRIX METHOD;DISPERSION RELATIONS;MONTE CARLO METHOD;COMPOSITE MATERIALS;RANDOMNESS;ULTRASONIC TESTING
数据来源: AIP
摘要:
Propagation of ultrasound across a solid layer with equally spaced parallel interfaces is studied by using a transfer matrix method. For a layer with identical interfaces the propagation of ultrasound is governed by a dispersion relation, which displays passing and stopping bands in the frequency domain. For a layer with interfaces that have random deviations from mean interface properties, the Fürstenberg theorem and Monte Carlo simulation have been used to study propagation of ultrasound across the layer. It has been shown that at all frequencies there is an exponential decay in the amplitude of the transmitted wave. This decay, which increases with increasing frequency, defines a localization phenomenon, since wave motion will be confined to the insonified side of the layer.
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