Characterization of thin films using generalized lamb wave dispersion relations
نویسندگان
چکیده
منابع مشابه
Characterization of thin films using generalized lamb wave dispersion relations
We used the Continuous Wave Scanning Acoustic Microscope to characterize thin film materials. The measurement of the dispersion curve of surface waves and the inversion of this dispersion equation relation, allow to determine the elastic constants, the density or the thickness of a thin layer on a substrate. Besides, it is possible to have qualitative information on the adhesion properties of t...
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Leaky Lamb waves (LLW) propagation in composite materials has been studied extensively since it was first observed in 1982. The wave is induced using a pitch-catch arrangement and the plate wave modes are detected by identifying minima in the reflected spectra to obtain the dispersion data. The wave behavior in multi-orientation laminates was well documented and corroborated experimentally with...
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The phenomenon of Leaky Lamb waves (LLW) in composite materials was first observed in 1982 using a Schlieren system. It has been studied extensively by numerous investigators and successfully shown to be an effective quantitative NDE tool. In spite of the success, the method has not become a standard inspection technique due to shortcoming that will be addressed in this manuscript. The LLW phen...
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Lamb waves are frequently used in nondestructive evaluation and are proposed for structural health monitoring applications. While many numerical methods to obtain dispersion curves for Lamb waves have been developed and implemented, in general they are time consuming and do not lend themselves to analyses involving the perturbation of parameters such as the small thickness and wave speed change...
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ژورنال
عنوان ژورنال: Le Journal de Physique IV
سال: 1993
ISSN: 1155-4339
DOI: 10.1051/jp4:19937346