@inproceedings{9582294bfb074351a22b294b03a39c8c,
title = "Nonlinear acoustic measurements and Rayleigh waves",
abstract = "An effective way to evaluate changes in the microstructure of a material or to assess fatigue damage at an early stage in fatigue life is by measuring the acoustic nonlinearity parameter β. Beta is defined originally for plane harmonic longitudinal waves and depends on the ratio of the amplitudes of the first and second harmonics in the measured signal. This paper extends the concept of the conventional nonlinear parameter to the case of nonlinear Rayleigh surface waves. Surface waves are more efficient in detecting fatigue damage that is usually initiated and more concentrated near the material surface. Based on using an approximate model for nonlinear wave propagation, a nonlinearity parameter β R for Rayleigh surface waves is proposed. Comparisons and discussions are made on the use of the nonlinearity parameter β R for Rayleigh surface waves.",
keywords = "Fatigue damage, Nonlinear Rayleigh waves, Nonlinear parameter",
author = "Mueller, {T. O.} and Kim, {J. Y.} and J. Qu and Jacobs, {L. J.}",
year = "2006",
month = mar,
day = "6",
doi = "10.1063/1.2184542",
language = "English",
isbn = "0735403120",
series = "AIP Conference Proceedings",
pages = "291--298",
booktitle = "Review of Progress in Quantitative Nondestructive Evaluation",
note = "Review of Progress in Quantitative Nondestructive ; Conference date: 31-07-2005 Through 05-08-2005",
}