Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6758359 | NDT & E International | 2015 | 7 Pages |
Abstract
This paper develops a measurement method for accurately determining dispersion curves of Rayleigh-type surface waves propagating on layer-coated elastic cylinders. It utilizes PVDF acoustic transducers and a defocusing measurement system. To deal with the cylindrically curved surface, a new cross-correlation waveform processing approach is proposed and verified. Cylindrical Rayleigh wave velocities of layered cylindrical solid samples have been successfully measured over a frequency range from 3 to 20Â MHz. The measured dispersion curves are in good agreement with their theoretical counterparts. It demonstrates the potential application for non-destructive evaluation of coating layers deposited on cylindrical solids.
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Authors
Chun-I Lin, Yan Lu, Cunfu He, Guorong Song, Yung-Chun Lee,