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Effect of geometry and electrical boundary conditions on R-curves for lead zirconate titanate ceramics

Kounga Njiwa, Alain Brice and Fett, Theo and Lupascu, Doru C. and Rödel, Jürgen (2006):
Effect of geometry and electrical boundary conditions on R-curves for lead zirconate titanate ceramics.
In: Engineering Fracture Mechanics, pp. 309-317, 73, (3), ISSN 00137944,
[Online-Edition: http://dx.doi.org/10.1016/j.engfracmech.2005.08.003],
[Article]

Abstract

R-curve measurements on PZT poled in thickness direction were carried out on CT specimens under different electric boundary conditions. The effect of specimen geometry was evaluated by measuring R-curves in CT specimens of different thickness and comparing these with R-curves in bend bars. A low coercive stress is responsible for the development of a large switching zone. This switching zone is of high relevance for the computation of the actual stress intensity factor at the crack tip and for the R-curve calculation.

Item Type: Article
Erschienen: 2006
Creators: Kounga Njiwa, Alain Brice and Fett, Theo and Lupascu, Doru C. and Rödel, Jürgen
Title: Effect of geometry and electrical boundary conditions on R-curves for lead zirconate titanate ceramics
Language: English
Abstract:

R-curve measurements on PZT poled in thickness direction were carried out on CT specimens under different electric boundary conditions. The effect of specimen geometry was evaluated by measuring R-curves in CT specimens of different thickness and comparing these with R-curves in bend bars. A low coercive stress is responsible for the development of a large switching zone. This switching zone is of high relevance for the computation of the actual stress intensity factor at the crack tip and for the R-curve calculation.

Journal or Publication Title: Engineering Fracture Mechanics
Volume: 73
Number: 3
Uncontrolled Keywords: PZT; Fracture; R-curve
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 15:19
Official URL: http://dx.doi.org/10.1016/j.engfracmech.2005.08.003
Identification Number: doi:10.1016/j.engfracmech.2005.08.003
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