Scholte wave characterization and its decay for various materials

Nasr, Salah; Duclos, J.; Leduc, Michel

doi:10.1121/1.398921

Cited by 10 publications

(6 citation statements)

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“…[8][9][10][11] Depending on the configuration used, two kinds of interface waves may propagate on a plane solid-liquid interface: the leaky Rayleigh wave and the Scholte wave ͑also called ''Stoneley wave'' or ''Scholte-Stoneley wave''͒. Both types of wave are of considerable interest in seismology, engineering, and nondestructive testing ͑NDT͒.…”

Section: Introductionmentioning

confidence: 99%

On the character of acoustic waves at the interface between hard and soft solids and liquids

Glorieux

Rostyne

Nelson

et al. 2001

The Journal of the Acoustical Society of America

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Laser ultrasonics is used to optically excite and detect acoustic waves at the interface between a liquid and a solid or coated solid. Several case studies show that this technique is feasible to investigate experimentally the theoretically predicted fundamental properties of different aspects of interface waves at liquid-solid interfaces and to characterize the elastic properties of soft solids. The theoretical prediction that the leaky Rayleigh (LR)-type root of the characteristic determinant becomes forbidden when the shear velocity of the solid lies below the bulk velocity of the liquid was experimentally confirmed. The depth profiling and nondestructive testing potential of Scholte waves was experimentally illustrated and explained by the properties of the wave displacement profile.

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Section: Introductionmentioning

confidence: 99%

On the character of acoustic waves at the interface between hard and soft solids and liquids

Glorieux

Rostyne

Nelson

et al. 2001

The Journal of the Acoustical Society of America

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“…For "hard" solid-fluid interfaces, such as "metal-fluid," the Scholte phase velocity is approximately equal to the speed of sound in the fluid. This is often attributed to the fact that the speed of sound in the fluid is substantially less than both the longitudinal and transverse speeds of sound in the metal [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…For "soft" solid-fluid interfaces, the phase velocity of the Scholte interface wave is notably less than the speed of sound in the fluid [5], with the symmetric coupled Scholte mode on a soft plate exhibiting dispersive behavior, and deviating from the Scholte and the fluid velocities at low frequencies. This has been previously observed by optically exciting these nearfield modes in plastic films, with thicknesses of 130 μm [23] and 50 μm [24] using laser ultrasonic techniques at megahertz frequencies.…”

Section: Introductionmentioning

confidence: 99%

“…This present study explores these soft solid-fluid interfaces, and examines the conditions under which they occur. The role of the material's elastic properties are fully considered, as opposed to just the speeds of sound [3][4][5]8,21,22,25]. The behavior of the coupled Scholte modes along a thin plate with soft interfaces is investigated.…”

Section: Introductionmentioning

confidence: 99%

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Coupled Scholte modes supported by soft elastic plates in water

et al. 2021

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Localized acoustic surface waves supported by a "soft" elastic plate in water are explored. Unlike many materials, such as aluminum, for soft interfaces the Scholte wave, a localized interface wave, has a speed well below that of sound in water, and the energy of the Scholte wave is no longer mainly localized to the water. We note that the Scholte velocity is largely independent of Poisson's ratio in the solid, and rather than the bulk speeds of sound, the ratio between the Young's modulus and the density of the solid may better indicate whether an interface is soft. The behavior of the coupled Scholte modes along a thin plate with soft interfaces are investigated. It is demonstrated, and experimentally verified using acrylic plates underwater, that for soft interfaces, the symmetric coupled Scholte mode exhibits dispersive behavior, and deviates from the Scholte and the fluid velocities at low frequencies.

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“…Scholte wave velocity is always lower than the longitudinal velocity of the fluid and the transverse velocity of the interfacing solids [21]. Sensing applications with quasi-Scholte waves have been reported for liquid characterization [3,11,[22][23][24] with their most important advantages being single transducer compatibility, high sensitivity to perturbations in liquids, and lossless transmission through the waveguide enabling separation of transducer and the target. Dipstick sensing system can be employed, which briefly consists of a thin plate solid waveguide, to which a shear wave transducer is attached to one end, and the other side is immersed in the target liquid.…”

Section: Introductionmentioning

confidence: 99%

Dispersion and Sensitivity Analysis of Quasi-Scholte Wave Liquid Sensing by Analytical Methods

Onen

2017

Journal of Sensors

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Ultrasonic-guided wave sensing relies on perturbation of wave propagation by changing physical properties of the target media. Solid waveguides, through which guided waves can be transduced between the transducer and the target media, are frequently employed for liquid sensing and several other applications. In this manuscript, liquid sensing sensitivity of dispersive quasi-Scholte waves, which are guided interface waves that travel at the solid-liquid boundary, is investigated. Dispersion analysis of quasi-Scholte waves is done and sensitivities of quasi-Scholte waves to changes in fluid density and speed of sound in a dipstick configuration are analyzed. An experimentally verified analytical model based on a global matrix approach is employed in a nondimensional manner to generate representative dispersion and sensitivity surfaces. Optimum configurations with respect to the material properties of the liquid and of the waveguide are illustrated, which would enable optimal quasi-Scholte liquid sensing.

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Scholte wave characterization and its decay for various materials

Cited by 10 publications

References 0 publications

On the character of acoustic waves at the interface between hard and soft solids and liquids

On the character of acoustic waves at the interface between hard and soft solids and liquids

Coupled Scholte modes supported by soft elastic plates in water

Dispersion and Sensitivity Analysis of Quasi-Scholte Wave Liquid Sensing by Analytical Methods

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