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Electric-Field-Induced Crack Initiation From a Notch in a Ferroelectric Ceramic

Westram, Ilona and Lupascu, Doru C. and Rödel, Jürgen and Laskewitz, Bernd and Kamlah, Marc (2007):
Electric-Field-Induced Crack Initiation From a Notch in a Ferroelectric Ceramic.
In: Journal of the American Ceramic Society, pp. 2849-2854, 90, (9), ISSN 0002-7820, [Online-Edition: http://dx.doi.org/10.1111/j.1551-2916.2007.01737.x],
[Article]

Abstract

Crack initiation of ferroelectrics under a cyclic electric field was studied using DCB specimens, which contained through-thickness notches of different lengths. An electric field larger than the coercive field strength of the material was applied and resulted in pop-in of a crack in the direction perpendicular to the field. The length of the pop-in varied with the length of the notch. Finite Element modeling was used to quantify the stresses occurring in the specimen under the application of the electric field. The model took into account the fully coupled ferroelectric and ferroelastic hysteresis behavior. Stress intensity factors were derived from the resulting stress distribution using the weight function method. The results were found to agree well with the experimental data.

Item Type: Article
Erschienen: 2007
Creators: Westram, Ilona and Lupascu, Doru C. and Rödel, Jürgen and Laskewitz, Bernd and Kamlah, Marc
Title: Electric-Field-Induced Crack Initiation From a Notch in a Ferroelectric Ceramic
Language: English
Abstract:

Crack initiation of ferroelectrics under a cyclic electric field was studied using DCB specimens, which contained through-thickness notches of different lengths. An electric field larger than the coercive field strength of the material was applied and resulted in pop-in of a crack in the direction perpendicular to the field. The length of the pop-in varied with the length of the notch. Finite Element modeling was used to quantify the stresses occurring in the specimen under the application of the electric field. The model took into account the fully coupled ferroelectric and ferroelastic hysteresis behavior. Stress intensity factors were derived from the resulting stress distribution using the weight function method. The results were found to agree well with the experimental data.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 90
Number: 9
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 18 May 2011 15:20
Official URL: http://dx.doi.org/10.1111/j.1551-2916.2007.01737.x
Identification Number: doi:10.1111/j.1551-2916.2007.01737.x
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