ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 42, (1) 29 - 38 (1998)


BENDING OF PIEZOELECTRIC ACTUATORS
 
Kroupa František 1, Nejezchleb Karel 2
 
1 Institute of Plasma Physics of the Academy of Sciences of the Czech Republic, Za Slovankou 3, 182 00 Prague
2 European Piezo Ceramics, Ltd., Za humny 115, 503 44 Libřice

An analytical solution of total deformations and stresses due to piezoelectric deformations and to external force is given for piezoelectric bending actuators composed generally of n layers. The deflection w(L) of the free end and the blocking force PB are discussed in detail for actuators composed of nuo or three layers. Actuators made from piezoelectric ceramics show some deviations, i.e. hysteresis and non-linearity, from predicted linear dependence of w(L) on the applied voltage. These deviations are due to the voltage dependence of piezoelectric parameters in this material.


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