Journal ArticleDOI
Influence of the electric field on vickers indentation crack growth in BaTiO3
Gerold A. Schneider,V. Heyer +1 more
Reads0
Chats0
TLDR
In this article, the Vickers indentation method was used to determine the crack growth of ferroelectric barium titanate (BaTiO3) ceramic under the influence of electric fields.Abstract:
In this study, the Vickers indentation method was used to determine the crack growth of ferroelectric barium titanate (BaTiO3) ceramic under the influence of electric fields. It was verified that an applied electric field induces distinct anisotropic crack growth parallel and perpendicular to the poling direction which is mainly interpreted as an anisotropy in fracture toughness. The curve of the measured crack lengths as a function of the applied electric field shows similarity with the strain hysteresis. Curves of cracks parallel and perpendicular to the electric field direction are symmetric to each other. Stress-induced ferroelastic domain switching is used to explain the observed crack lengths anisotropy and change in fracture toughness.read more
Citations
More filters
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
Fully coupled, multi-axial, symmetric constitutive laws for polycrystalline ferroelectric ceramics
TL;DR: In this article, a general form for multiaxial constitutive laws for ferroelectric ceramics is constructed, where switching surfaces and associated flow rules are postulated in a modified stress and electric field space such that a positive dissipation rate during switching is guaranteed.
Journal ArticleDOI
Fracture mechanics of piezoelectric materials – Where are we right now?
TL;DR: In this paper, the authors give a short overview and a critical discussion about the present state in the field of piezoelectric fracture mechanics, with emphasis on special features like anisotropy, mode mixture and electric properties of cracks.
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
More filters
Journal ArticleDOI
A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughness: I, Direct Crack Measurements
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.
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
Elastic/Plastic Indentation Damage in Ceramics: The Median/Radial Crack System
TL;DR: In this article, a theory for describing the evolution of the median/radial crack system in the far field of sharp-indenter contacts is developed, based on a model in which the complex elastic/plastic field beneath the indenter is resolved into elastic and residual components.
Journal ArticleDOI
Indentation fracture: principles and applications
Brian R. Lawn,Rodney Wilshaw +1 more
TL;DR: The basic principles and practical applications of indentation fracture are reviewed in this article, with a focus on the application of fracture fracture in the field of orthogonal fracture repair and alignment.
Journal ArticleDOI
Fracture mechanics for piezoelectric ceramics
TL;DR: In this paper, the authors study cracks either in piezoelectrics, or on interfaces between the materials such as metal electrodes or polymer matrices, and derive the macroscopic field regarding the crack tip as a physically structureless point.