In this paper, we studied the propagation of Love waves in multilayered viscoelastic orthotropic medium in the presence of initial stress by using finite difference scheme. The closed form of dispe...

Propagation of Love wave in multilayered viscoelastic orthotropic medium with initial stress

The analysis of the wave propagation phenomenon on magnetoelastic fiber-reinforced (MEFR) composites has not yet been much explored. The present paper investigates the dispersive behavior ...

Analysis of SH-Wave Propagation in Magnetoelastic Fiber-Reinforced Layer Resting over Inhomogeneous Viscoelastic Half-Space with Corrugation

By using the characteristics of two disparate materials (BaTiO3 ceramic and PZT-5H ceramic) on SiO2 glass, we have analyzed shear horizontal wave (SH wave) propagation through a piezo-visco-elastic...

Comparative study of the piezo-viscous effect of SH wave propagation with irregular and irregular free interfaces in different piezo-electric stratified media

The present study is carried out to investigate the traversing of a Love-type wave in a prestressed anisotropic magnetoelastic stratum (PAMES) bounded between a prestressed anisotropic porous upper substrate (PAPUS) and prestressed anisotropic porous lower substrate (PAPLS). The exact solution of the governing equations is acquired and explained in detail for various effective parameters. Irregular boundary conditions have been employed for both the interfaces of the sandwiched layer. The variable separable technique has been used to determine the exact solution of the governing equations. The impacts of diverse parameters such as prestress, anisotropic porosity, anisotropic magnetoelasticity, irregularity parameters on phase, and damped velocity of Love-type wave have been discussed. This model contains huge potential to deal with many commercial and industrial applications in acoustical engineering, geotechnical engineering, ultrasonics, earthquake engineering, and geophysics. Results indicate that the anisotropic magnetoelastic parameter possesses a positive impact on phase and damped velocity. The damped velocity converges to some constant magnitude for distinct values of the porosity parameter.Practical ApplicationsThis is a theoretical work on the seismic wave propagation of surface waves. In this work, the seismic tremor, the soil components, and the transducers are made with the help of both theoretical and numerical calculations. This research could have also been used in acoustic design, earthquake engineering, geophysics, and ultrasonics. Seismic waves are also applicable for forecasting. This can be improved by putting a porous material on the structure's free surface. The goal of looking at different physical situations is to find ways that the results of this study can be used in science, technology, or the field of geotechnics. Geotechnical engineering is an integral part of civil engineering that looks at how earth materials work in engineering. Geotechnical engineers use soil properties, such as porosity, void ratio, permeability, and so forth, to analyze site conditions and plan earthworks, retaining structures, and foundations. The surface wave survey method is under continuous evolution. On a small scale, it can be used to describe a medium without touching it. On a large scale, it can be used to do a geotechnical survey after an earthquake. Even though the sizes of these applications are very different, they all use the way surface waves move along the edge of a layered medium. 

Impact of Prestressed Anisotropic Porous and Prestressed Anisotropic Magnetoelastic Layers on a Love-Type Wave

The behavior of surface horizontally polarized shear waves (SH waves) in the composite multi-material structure with a periodic irregular surface and interface is investigated analytically in the present study. To unravel the enshrouded features of the SH-wave propagation in a multi-layer structure, we consider a model of three distinct composite materials. In the schematic of the problem, the guiding layer (M-I) contains fluid-saturated porous materials of finite thickness, the intermediate layer (M-II) contains fiber-reinforced composites, and the substrate contains the functionally graded orthotropic materials (M-III). The free surface of M-I and the upper interface of the medium are considered to be irregular on a periodic basis, but the interface of M-II and M-III is supposed to be regular. The dispersion relation is obtained analytically and demonstrated graphically for the phase velocity versus the wave number to analyze the propagation behavior of the SH-wave propagation in the proposed structure. The acquired results resemble the typical Love wave results, confirming the validity of the present work. The current work provides a comprehensive evaluation of the impact of regular and irregular boundaries of the composite materials on the phase velocity of the SH waves. It is notable that the behavior of the reinforced parameters, initial stress, and porosity on the phase velocity is consistent in both scenarios. More than the irregularity of the free surface, the periodic irregularity of the interface had an impact on the phase velocity. The obtained results are useful to understand the compositions of the materials on the mountain surface.

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The Behavior of Shear Waves in the Composite Multi-Material Structure with the Periodic Asymmetric Surfaces

A mathematical model was designed to analyze the propagation characteristics of Love waves traversing through an orthotropic visco-elastic FGM layer under initial stress lying over a half-s...

Analysis of Dispersion and Damping Characteristics of Love Wave Propagation in Orthotropic Visco-Elastic FGM Layer with Corrugated Boundaries

Dispersion characteristics of SH wave propagation in a viscous fiber-reinforced stratified media

The present study investigates the traversal of torsional wave at a corrugated interface between viscoelastic sandy medium and inhomogeneous half-space. In the lower half-space, the inhomogeneity has been assumed as an exponential variation in density and rigidity with respect to depth. We have taken the method of variable separation to obtain analytical solution of displacement components for layer and half-space. Consequently, we have obtained the wave velocity equation of torsional wave using sufficient boundary conditions. Moreover, the wave velocity equation has been reduced to the pre-established classical relationship of Love wave, when both the media are isotropic and homogeneous, as shown in special case. The comparative study of the influence of various parametric traits viz. sandiness, viscoelasticity, corrugated and inhomogeneity associated with the studied model on the traversal characteristics of torsional wave is one of the salient feature of the current investigation. The study may find its possible applications in various seismic prospecting techniques to analyse the nature of torsional wave propagation in the considered layered media.

Chandani Kumari

Papers

Analysis of Dispersion and Damping Characteristics of Love Wave Propagation in Orthotropic Visco-Elastic FGM Layer with Corrugated Boundaries

Comparative study of the piezo-viscous effect of SH wave propagation with irregular and irregular free interfaces in different piezo-electric stratified media

Dispersion characteristics of SH wave propagation in a viscous fiber-reinforced stratified media

Propagation of torsional wave at a corrugated interface between viscoelastic sandy medium and inhomogeneous half-space

Analytical study of electro-mechanical parameters on Love wave in an imperfectly bonded VPCM layered structure