Abstract
A structure for a multilayer piezoelectric ceramic actuator has been studied using finite element method analysis for reducing stresses which are induced at an adhesive layer between the ceramic actuator and a certain body to which the actuator is attached. The stresses are induced by a piezoelectric unstiffened effect (or piezoelectric transverse effect) and they cause mechanical rupture of the adhesive layer. They are successfully reduced for the actuator with both piezoelectric inactive layers and layers which induce a small strain on its top and bottom. It was experimentally confirmed that no mechanical rupture occurs, when adopting an actuator with the improved structure.
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