An Improved Method to Measure Slow Compressional Wave in Fluid-Saturated Porous Plates by Using Lamb Modes
The theory of elastic wave propagation in fluid-saturated porous solids was established by Biot in 1956 [1,2]. Biot predicted the existence of three bulk modes: fast compressional wave, slow compressional wave, and shear wave. However, experimental confirmation of Biot’s theory at ultrasonic frequencies was not achieved until 1980 when Plona  observed slow compressional waves on fluid-saturated synthetic porous solids by using mode conversion technique. Since that time, Plona’s method has been adopted as a major approach to measure slow compressional wave in fluid-saturated porous media.
KeywordsFree Boundary Dispersion Curve Slow Wave Rayleigh Wave Lamb Wave
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