Abstract
The bimorphs in this paper are provided with electrodes in parallel manner. When an electric field is applied, one plate elongates and the other contracts. This results in a bending motion and used for actuators or sensors. According to plate theory assumptions, establish the strain deflection expression firstly. And then, derive the strain-stress relation of PZT layer from g-type piezoelectric equations. Finally, some general equations are derived for piezoelectric laminated plates and can be used in theoretical or simulation analysis. Mainly, a kind of deflection differential equation about 3-layer electrical parallel piezoelectric thin plate has been obtained. Furthermore, replacing static load by initial force per unit area, the kinematic differential equation has also been derived.
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