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Cyclic Fatigue Crack Growth in PZT Under Mechanical Loading

Salz, Christopher R. J. and Hoffman, Mark and Westram, Ilona and Rödel, Jürgen (2005):
Cyclic Fatigue Crack Growth in PZT Under Mechanical Loading.
In: Journal of the American Ceramic Society, pp. 1331-1333, 88, (5), ISSN 0002-7820, [Online-Edition: http://dx.doi.org/10.1111/j.1551-2916.2005.00235.x],
[Article]

Abstract

Crack growth under static and cyclic mechanical loading in lead zirconate titanate was studied using four point bend specimens in poled and unpoled states. Fatigue crack growth occurred at lower stress intensity factors than crack growth observed under static loading. The relation between crack velocity and applied stress intensity factor under static loading was affected by poling and followed a power-law relationship. Crack velocity vs. stress intensity amplitude under cyclic loading followed a Paris power-law relationship and was found to be unaffected by poling. A controlled unloading experiment revealed that the apparent stress intensity factor for crack extension decreased with increased unloading time but was essentially unaffected when the unloading cycle was less than five seconds, hence indicating the absence of an extrinsic fatigue mechanism.

Item Type: Article
Erschienen: 2005
Creators: Salz, Christopher R. J. and Hoffman, Mark and Westram, Ilona and Rödel, Jürgen
Title: Cyclic Fatigue Crack Growth in PZT Under Mechanical Loading
Language: English
Abstract:

Crack growth under static and cyclic mechanical loading in lead zirconate titanate was studied using four point bend specimens in poled and unpoled states. Fatigue crack growth occurred at lower stress intensity factors than crack growth observed under static loading. The relation between crack velocity and applied stress intensity factor under static loading was affected by poling and followed a power-law relationship. Crack velocity vs. stress intensity amplitude under cyclic loading followed a Paris power-law relationship and was found to be unaffected by poling. A controlled unloading experiment revealed that the apparent stress intensity factor for crack extension decreased with increased unloading time but was essentially unaffected when the unloading cycle was less than five seconds, hence indicating the absence of an extrinsic fatigue mechanism.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 88
Number: 5
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.1551-2916.2005.00235.x
Identification Number: doi:10.1111/j.1551-2916.2005.00235.x
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