Abstract
Cracking near the edge of an internal electrode embedded in ferroelectric ceramic actuators is analyzed. The boundary of the domain switching zone near the edge of the internal electrode in a ceramic multilayer actuator is determined based on the nonlinear electric theory. Under small-scale conditions, the stress intensity factor induced by ferroelectric domain switching is numerically obtained for dissimilar crack surface boundary conditions: the insulating crack and the conducting crack. It is found that the stress intensity factor for a crack emanating from an internal electrode depends strongly on the ratio of the coercive electric field to the yield electric field.
Published Version
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