Journal
JOURNAL OF APPLIED PHYSICS
Volume 121, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4974950
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Funding
- French National Agency for Research (ANR) [ANR 2010 BLAN 0302]
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This paper reports the implementation of digital color holography to investigate elastic waves propagating along a layer of a granular medium. The holographic set-up provides simultaneous recording and measurement of the 3D dynamic displacement at the surface. Full-field measurements of the acoustic amplitude and phase at different excitation frequencies are obtained. It is shown that the experimental data can be used to obtain the dispersion curve of the modes propagating in this granular medium layer. The experimental dispersion curve and that obtained from a finite element modeling of the problem are found to be in good agreement. In addition, full-field images of the interaction of an acoustic wave guided in the granular layer with a buried object are also shown. Published by AIP Publishing.
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