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Constraint-induced crack initiation at electrode edges in piezoelectric ceramics

Santos e Lucato, Sergio Luis dos and Lupascu, Doru C. and Kamlah, Marc and Rödel, Jürgen and Lynch, Christopher S. (2001):
Constraint-induced crack initiation at electrode edges in piezoelectric ceramics.
In: Acta Materialia, PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, pp. 2751-2759, 49, (14), ISSN 1359-6454,
[Article]

Abstract

A strain incompatibility arises between the electrically active and inactive parts of a partially electroded piezoelectric material. This leads to cracking perpendicular to the electrode edge. Symmetric partial electrodes of different widths were applied to lead zirconate titanate (PZT) plates to study the development of these cracks. Different cracking patterns appeared upon application of an electric field, depending on the degree of coverage and on the thickness of the plates. The apparent coercive fields are correlated to the degree of clamping and the amount of cracking in the specimens. Non-linear finite element modelling is used to analyse the material response.

Item Type: Article
Erschienen: 2001
Creators: Santos e Lucato, Sergio Luis dos and Lupascu, Doru C. and Kamlah, Marc and Rödel, Jürgen and Lynch, Christopher S.
Title: Constraint-induced crack initiation at electrode edges in piezoelectric ceramics
Language: English
Abstract:

A strain incompatibility arises between the electrically active and inactive parts of a partially electroded piezoelectric material. This leads to cracking perpendicular to the electrode edge. Symmetric partial electrodes of different widths were applied to lead zirconate titanate (PZT) plates to study the development of these cracks. Different cracking patterns appeared upon application of an electric field, depending on the degree of coverage and on the thickness of the plates. The apparent coercive fields are correlated to the degree of clamping and the amount of cracking in the specimens. Non-linear finite element modelling is used to analyse the material response.

Journal or Publication Title: Acta Materialia
Volume: 49
Number: 14
Publisher: PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Uncontrolled Keywords: computer simulation; ceramics (functional); electrical properties (piezoelectricity); fracture (brittle); theory & modelling (structural behaviour); MULTILAYER ACTUATORS; FERROELECTRIC CERAMICS
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: 14 Jul 2011 10:46
Identification Number: 462TF
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