Wave Propagation in Couple Stress Micropolar Thermoelastic Solid under an Inviscid Liquid Layer

The present paper deals with the propagation of waves in non-local couple stress microploar thermoelastic solid half space lying under an inviscid liquid layer. We found two sets of coupled longitudinal waves and coupled transverse waves which are dispersive in nature and associated with attenuation...

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Bibliographic Details
Published in:Mechanics of solids 2023-12, Vol.58 (9), p.3199-3225
Main Authors: Sahrawat, Ravinder Kumar, Rani, Sonam
Format: Article
Language:English
Subjects:
Classical Mechanics
Coefficients
Data analysis
Incidence angle
Longitudinal waves
Nondestructive testing
Physics
Physics and Astronomy
Seismic surveys
Stress propagation
Transverse waves
Wave dispersion
Wave propagation
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Summary:The present paper deals with the propagation of waves in non-local couple stress microploar thermoelastic solid half space lying under an inviscid liquid layer. We found two sets of coupled longitudinal waves and coupled transverse waves which are dispersive in nature and associated with attenuation. In addition to coupled waves, there also exists one independent longitudinal microroational wave which is dispersive in nature. Two types of waves namely coupled longitudinal waves and coupled transverse waves incident at the common interface. The value of various reflection coefficients and their energy ratios are calculated in both cases against the angle of incidence for a specific model. It is found that all reflection coefficients and energy ratios are affected by presence of non-locality, couple stress and angle of incidence. Their impact on various coefficients and energy ratios are studied numerically and depicted graphically. Some special cases are also deduced from the present investigation. The seismic reflection techniques are of great utility in determining the seismic structure of the earth and oceanic crust. Not only this, current findings may also be helpful in forecasting geophysical parameters at greater depths through signal processing, non-destructive testing and seismic data analysis.
ISSN:0025-6544
1934-7936
DOI:10.3103/S0025654423601507