In-plane P-SV waves from a piezoelectric strip actuator: exact versus effective boundary condition solutions

• A piezoelectric strip of finite width and thickness is placed on top of anisotropic elastic half-space. It operates in actuator mode and a timeharmonic voltage is thus applied across it. The piezoelectric material isof type $6mm$ oriented so that a 2D inplane (P-SV) problem results.By Fourier series expansions the problem is solved exactly and thisresult is compared to the case when the piezoelectric strip is replaced byan effective boundary condition, which is derived by series expansionsin the thickness coordinate in the piezoelectric strip. At low frequenciesthe results agree very well and this corresponds to the situation oftenmet in practice. In general, the effective boundary condition should bemuch easier to apply, for example when a FEM program is used.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Teknisk mekanik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Applied Mechanics (hsv//eng)

Nyckelord

piezoelectricity

actuator

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