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Reflection and refraction of plane quasi-longitudinal waves at an interface of two piezoelectric media under initial stresses

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Abstract

This paper is devoted to study a problem of reflection and refraction of quasi-longitudinal waves under initial stresses at an interface of two anisotropic piezoelectric media with different properties. One of the two media is aluminum nitride, which is considered the down piezoelectric medium and the above medium is chosen as PZT-5H ceramics. The two piezoelectric media welded are assumed to be anisotropic of a type of a transversely isotropic crystals (hexagonal crystal structure, class 6 mm). The equations of motion and constitutive relations for the piezoelectric media have been written. Suitable boundary conditions are used to obtain the reflection and refraction coefficients. For an incidence of quasi-longitudinal plane waves, four independent-type amplitude ratios of elastic displacement components for plane waves, called quasi-longitudinal (qP) and quasi-shear vertical (qSV) waves, are shown to exist. Also, it is observed that there exist four dependent amplitude ratios of electric potential, which are proportional to the previous four types. Finally, it is found that the coefficients of reflection and refraction are functions of angle of incidence, elastic constants, piezoelectric potential parameters and the initial stresses. Numerical computations and the results obtained are depicted graphically. In the end, a particular case has been reduced from the present study. This investigation is considered important because the initial stresses in such practical problems are inevitable and may result in frequency shift, a change in the velocity of surface waves and controlling the selectivity of a filter compensation of the devices.

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Authors and Affiliations

  1. Mathematical Department, Faculty of Science, Sohag University, Sohag, 82425, Egypt

    Abo-el-nour N. Abd-alla

  2. Mathematical Department, Jazan University, Jazan, Kingdom of Saudi Arabia

    Fatimah A. Alsheikh

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  1. Abo-el-nour N. Abd-alla
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  2. Fatimah A. Alsheikh
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Correspondence to Abo-el-nour N. Abd-alla.

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Abd-alla, Aen.N., Alsheikh, F.A. Reflection and refraction of plane quasi-longitudinal waves at an interface of two piezoelectric media under initial stresses. Arch Appl Mech 79, 843–857 (2009). https://doi.org/10.1007/s00419-008-0257-y

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  • DOI: https://doi.org/10.1007/s00419-008-0257-y

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