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Effect of Transverse Electric Fields on Fracture Behavior of Ferroelectric Ceramics  

Lee Jong Sik (전남대학교 대학원 기계공학과)
Beom Hyeon Gyu (인하대학교 기계공학과)
Jeong Kyoung Moon (전남대학교 대학원 기계공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.22, no.2, 2005 , pp. 120-125 More about this Journal
Abstract
Effect of transverse electric fields on fracture behavior in ferroelectric ceramics under purely electrical loading is investigated. It is shown that the shape and size of the domain switching zone depend strongly on the ratio of the transverse electric field to the coercive electric field as well as the direction of the applied electric field. Under small-scale conditions, the crack-tip mode I and II stress intensity factors induced by ferroelectric domain switching are numerically obtained. The crack kinking in ferroelectric ceramics is also discussed.
Keywords
Ferroelectric ceramics; Domain switching; Transverse electric field; Stress intensity factor; Crack kinking;
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