An approach for analysis of poled/depolarized piezoelectric materials witha crack

Citation
B. Liu et al., An approach for analysis of poled/depolarized piezoelectric materials witha crack, INT J FRACT, 111(4), 2001, pp. 395-407
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF FRACTURE
ISSN journal
0376-9429 → ACNP
Volume
111
Issue
4
Year of publication
2001
Pages
395 - 407
Database
ISI
SICI code
0376-9429(200110)111:4<395:AAFAOP>2.0.ZU;2-8
Abstract
In this paper, the influence of dielectric medium inside a crack, on crack growth, in an infinite poled or depolarized ceramic. has been studied by em ploying an electric boundary condition derived from the exact boundary cond itions proposed by Sosa ( 1996). The effect of remanent polarization has al so been examined. The results obtained show that electric displacement on c rack surfaces is not always zero. Hence, for studying fracture problems of piezoelectric ceramics with cracks accurately, the exact boundary condition s should be implemented. In addition, the results indicate that the effect of remanent polarization is equivalent to that of a positive electric field and it cannot be neglected. It is also found that a positive electric fiel d always has a tendency to open a crack, and a negative electric field tend s to close a crack.