Devising a method of making actuators with reduced poling-induced tension
Journal
Sensors and Actuators, A: Physical
Journal Volume
107
Journal Issue
1
Pages
14-20
Date Issued
2003
Author(s)
Abstract
Domain switching of poled dielectric ceramics in actuators induces tensile stresses in the polarization direction in both the end margin and the end termination which, in turn, result in cracking and create a major reliability problem. A method of reducing these poling-induced tensile stresses is devised in the present study. This is achieved by dividing the poled region into blocks of poled region separated by bands of unpoled region. The stress field can further be modified by changing (1) the elastic constants of the bands of unpoled region, and (2) the geometry of the interface between the poled region and the end margin from a conventional flat plane to a curved one. The numerical simulation results are presented. ? 2003 Elsevier B.V. All rights reserved.
Subjects
Actuators
Domain switching
Ferroelectric ceramics
Poling effect
Stresses
SDGs
Type
journal article