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In this paper, an analytical model is developed to study the influence of initial
hydrostatic stress and piezo elasticity on elastic waves in a piezoelectric layer embedded on a
gravitating half space with slip interface. The piezo electric layer considered for this study is
hexagonal (6mm) material. The problem is described using equations of linear elasticity with
initial hydrostatic stress and piezo elastic inclusions. Displacement functions in terms of
velocity potential are introduced to separate the motion's equations and electric conduction
equations. The frequency equations are obtained by stress free and electrically shorted
boundary conditions at the gravitating half space. The numerical computation is carried out
for the PZT-4A material. The obtained results are presented graphically to show the effect of
piezo elastic coupling and hydrostatic stress on the elastic waves.
Keywords: elastic waves, piezoelectric layers, hydrostatic stress, slip interface, NEMS |
full paper (pdf, 1072 Kb)