Proceedings ArticleDOI
Effect of electric fields on fracture behavior of PZT ceramics
A. G. Tobin,Eugene Pak +1 more
- Vol. 1916, pp 78-86
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TLDR
In this paper, the effects of static and time-varying electric fields on the fatigue lifetime of PZT-8 were investigated and significant differences in the crack growth behavior perpendicular and parallel to the poling direction were observed.Abstract:
To obtain a better understanding of the effects of electric fields on the fatigue lifetime of PZT materials, specimens of poled and unpoled PZT-8 were either pre-indented to generate a pre- crack or indented in the presence of an applied static electric field. Significant differences in the crack growth behavior perpendicular and parallel to the poling direction were observed in static and time-varying electric fields leading to a reduction in the fracture toughness normal to the poling axis. Fatigue crack growth was significant at field amplitudes as low as 5% of the poling fields. These results are shown to be related to the effects of electrical fields on the stresses at the crack tip.© (1993) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.read more
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Book ChapterDOI
Fracture of piezoelectric ceramics
TL;DR: In this article, the fracture behavior of piezoelectric ceramics under combined electrical and mechanical loading has been among the most prevalent research topics, and four types of nonlinear approaches considered are: electrostriction, domain switching, domain wall kinetics, and polarization saturation at a crack tip.
Journal ArticleDOI
Fracture behaviors of piezoelectric materials
Tong-Yi Zhang,C.F. Gao +1 more
TL;DR: Theoretical analyses and experimental observations of the failure and fracture behaviors of piezoelectric materials are presented in this paper, where the theoretical analyses are based on the Stroh formalism.
Journal ArticleDOI
Linear electro-elastic analysis of a cavity or a crack in a piezoelectric material
TL;DR: In this article, the authors derived the energy release rate for an elliptical cylinder cavity or a crack inside an infinite piezoelectric medium under combined mechanical-electrical loadings via the Stroh formalism and well confirmed by finite element analysis.
Journal ArticleDOI
Towards a fracture mechanics for brittle piezoelectric and dielectric materials
TL;DR: In this paper, a theoretical fracture model for brittle piezoelectric and dielectric materials is developed consistent with standard features of elasticity and Dielectricity, and the influence of electric field and mechanical loading is considered in this approach.
References
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A Critical evaluation of indentation techniques for measuring fracture toughness
TL;DR: In this paper, the application of indentation techniques to the evaluation of fracture toughness is examined critically, in two parts: the first part is focused on an approach which involves direct measurement of Vickers-produced radial cracks as a function of the indentation load.
Journal ArticleDOI
Crack Extension Force in a Piezoelectric Material
TL;DR: In this article, a closed-form solution to the antiplane fracture problem is obtained for an unbounded piezoelectric medium, along with a path-independent integral integral of fracture mechanics.
Journal ArticleDOI
Linear electro-elastic fracture mechanics of piezoelectric materials
TL;DR: In this paper, the influence of the electrical fields on the fracture behavior of piezoelectric materials was investigated using distributed dislocations and electric dipoles to calculate the electro-elastic fields and the energy-release rate for a finite crack embedded in an infinite piezelectric medium which is subjected to both mechanical and electric loads.
Journal ArticleDOI
Fracture mechanics of piezoelectric materials
TL;DR: In this article, an analysis of the deformation of a piezoelectric medium under mechanical stress is provided, and a rational approach is provided for the determination of critical load conditions leading to the development of cracks, elucidating the mechanism of fracture.