Surface wave in a Maxwell liquid-saturated poroelastic layer

Abstract

An analytical approach of the propagation and attenuation of Love waves in a viscoelastic liquid-saturated poroelastic layer has been considered in this paper. The equations of motion have been formulated separately for different media under suitable boundary conditions at the interface of viscoelastic liquid, poroelastic layer and elastic substrate. Following Biot's theory of poroelasticity, a new accurate and simple generalized dispersion equation has been established to design Love wave liquid sensors. The effect of liquid shear viscosity on the Love waves velocity has been studied. The influence of thickness and porosity of the waveguide layer has also been shown on the Love waves velocity and attenuation. The various investigations results can serve as benchmark solutions in design of liquid sensors and nonde-structive testing.

Bleustein–Gulyaev waves in a finite piezoelectric material loaded with a viscoelastic fluid

“…For liquid sensing applications, acoustic waves which have the particle displacement parallel to the device surface and normal to the wave propagation direction are preferred. These waves called shear horizontal waves include Love waves [1,2,3,4,5,6] and Bleustein-Gulyaev waves [7,8,9,10,11,12,13,14,15]. The Bleustein-Gulyaev waves have a single component transverse to the propagation direction.…”

“…The Bleustein-Gulyaev sensor is basically formed by a piezoelectric ceramic covered with a very thin metallic layer [11]. This sensor does not require an aditionnal guiding layer to trap the wave energy to the surface as in the case of the Love Wave sensor [5,6]. Consequently, the fabrication of the Bleustein-Gulyaev sensors is easier than the contruction of the Love wave sensors.…”

Mathematical modelling of Love waves propagation in viscoelastic waveguide loaded with complex fluids

“…In this work the substrate is considered to be a semi-infinite medium [13,17], and mechanical displacement u (e) 3 is governed, using the elastodynamic theory by the Navier's equation [15]…”