Large and electric field tunable superelasticity in BaTiO3 crystals predicted by an incremental domain switching criterion

2013 ◽  
Vol 102 (9) ◽  
pp. 092905 ◽  
Author(s):  
Y. W. Li ◽  
X. B. Ren ◽  
F. X. Li ◽  
H. S. Luo ◽  
D. N. Fang
Keyword(s):  
Electric Field ◽  
Domain Switching ◽  
Switching Criterion

Analysis of Domain Switching Zone Near a Crack Tip in Piezoceramics

1999 ◽  
Author(s):  
I. Chang ◽  
C. T. Sun
Keyword(s):  
Stress Field ◽  
Electric Field ◽  
Applied Electric Field ◽  
Domain Switching ◽  
Piezoelectric Materials ◽  
Crack Tip ◽  
Finite Element Program ◽  
Poling Direction ◽  
Element Program ◽  
Switching Criterion

Abstract In this paper, a finite element program in conjunction with domain switching criterion was developed to analyze domain wall switching and its effect on the near tip stress field in piezoelectric materials containing a crack. Domain switching zones in the vicinity of the crack tip corresponding to various combined electric and mechanical loads were obtained. It is found that the size, shape and mode (90° or 180° switching) of domain switching zone near the crack tip depend on the direction as well as magnitude of the applied electric field. For a positive electric field (same as the poling direction), 90° domain switching occurs behind the crack tip, and the zone increases as the applied positive electric field increases. If the applied electric field is negative, then a 180° domain switching zone appears ahead of the crack tip while a 90° domain switching zone exists behind the tip. Moreover, the stress field near the crack tip is found to be significantly affected by the domain switching.

Electric-Field-Induced Domain Switching and Domain Texture Relaxations in Bulk Bismuth Ferrite

2015 ◽  
Vol 98 (12) ◽  
pp. 3884-3890 ◽  
Author(s):  
Neamul H. Khansur ◽  
Tadej Rojac ◽  
Dragan Damjanovic ◽  
Christina Reinhard ◽  
Kyle G. Webber ◽  
...  
Keyword(s):  
Electric Field ◽  
Domain Switching ◽  
Bismuth Ferrite

Investigations of PMN-PT Single Crystal Performance

2010 ◽  
Author(s):  
Virginia G. DeGiorgi ◽  
E. P. Gorzkowski ◽  
M.-J. Pan ◽  
M. A. Qidwai ◽  
Stephanie A. Wimmer
Keyword(s):  
Finite Element ◽  
Electric Field ◽  
Single Crystals ◽  
Domain Switching ◽  
Fatigue Behavior ◽  
Constitutive Models ◽  
Nonlinear Behavior ◽  
Computational Effort ◽  
Basic Material ◽  
Poling Direction

Application of new materials, such as PMN-PT single crystals, requires a good understanding of basic material performance under both electrical and mechanical loading. Over the past 5 years the authors have used both computational and experimental techniques to examine the relationships between poling direction, crystal orientation, and electric field actuation. Experiments show mixed results indicating that the relationship between material orientation and loading is more complex than originally imagined. In some cases crack initiation and propagation perpendicular to the applied field was observed within a few thousand cycles but in other cases no failure was observed even after a few hundred thousand cycles despite crack growth in the presence of introduced defects. Computational effort quickly identified a gap between development of theoretical constitutive models that addressed domain switching based nonlinear behavior and what was available in workable form as part of commercial finite element codes. This led to the implementation of a macro-mechanical constitutive model which addresses domain switching, into a commercially available finite element code. The rate independent version has been used to investigate issues of electric field actuation and poling direction. Presented here are insights into the fracture and fatigue behavior of piezoelectric single crystals from both experimental and computational studies.

Investigations on Multi-axial Domain Switching Criteria for Piezoceramics

2005 ◽  
Vol 881 ◽  
Author(s):  
Bernd Laskewitz ◽  
Dayu Zhou ◽  
Marc Kamlah
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Domain Switching ◽  
Axial Stress ◽  
Initial Domain ◽  
Hollow Cylinders ◽  
Thin Walled ◽  
Electromechanical Loading ◽  
Stress States ◽  
Strain Responses

AbstractInitially unpoled soft PZT was subjected to a proportional, coaxial electromechanical loading. The ratio of compressive stress to electric field was changed between the experiments. From this series of nonlinear polarization and strain responses were obtained. Based on an offset method, initial domain switching states in the two-dimensional stress-electric field space were determined. In continuum mechanics, thin walled tubes are used to investigate multi-axial stress states. In this context, thin walled means a ratio of wall thickness to radius of 1:10 or thinner. However, simple linear dielectric analysis indicates an inhomogeneous electric field distribution in such geometries.Therefore, the suitability of hollow cylinders (in the range from thick to thin walled tubes) for multi-axial electromechanical experiments has to be investigated. Simulations with a finite element tool based on a phenomenological constitutive model for ferroelectric and ferroelastic hysteresis behavior were performed. The results confirm inhomogeneous distributions of electric fields and stresses after poling. A geometry variation is discussed to minimize these effects.

Uniaxial Compressive Stress Dependence of the High-Field Dielectric and Piezoelectric Performance of Soft PZT Piezoceramics

2004 ◽  
Vol 19 (3) ◽  
pp. 834-842 ◽  
Author(s):  
Dayu Zhou ◽  
Marc Kamlah ◽  
Dietrich Munz
Keyword(s):  
Electric Field ◽  
Lead Zirconate Titanate ◽  
Domain Switching ◽  
Lead Zirconate ◽  
Transverse Strain ◽  
Dissipation Energy ◽  
Depolarization Effect ◽  
Uniaxial Compressive Stress ◽  
Piezoelectric Performance ◽  
Electromechanical Load

The influence of uniaxial prestress on dielectric and piezoelectric performance was studied for soft lead zirconate titanate piezoceramics. High electric field induced polarization and longitudinal/transverse strain were measured at different compression preload levels of up to −400 MPa. The parameters evaluated included polarization/strain outputs, dielectric permittivity, piezoelectric constants, and dissipation energy as a function of the mechanical preload and electric-field strength. The results indicate a significant enhancement of the dielectric and piezoelectric performance within a certain prestress loading range. At much higher stress levels, the predominant mechanical depolarization effect makes the material exhibit hardly any piezoeffect. However, the enhanced performance achieved by a small stress preload is accompanied by an unfavorable increased hysteresis, and consequently, increased energy loss, which is attributed to a larger extrinsic contribution due to more non-180° domain switching induced by the combined electromechanical load.

Stroboscopic time-of-flight neutron diffraction during cyclic testing using the event data recording system at J-PARC

2018 ◽  
Vol 51 (3) ◽  
pp. 630-634 ◽  
Author(s):  
Takuro Kawasaki ◽  
Yasuhiro Inamura ◽  
Takayoshi Ito ◽  
Takeshi Nakatani ◽  
Stefanus Harjo ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Electric Field ◽  
Domain Switching ◽  
Time Of Flight ◽  
Event Data ◽  
Diffraction Intensity ◽  
Time Resolved ◽  
Properties Of Materials ◽  
Neutron Diffraction Technique ◽  
Time Information

A time-resolved time-of-flight neutron diffraction technique to characterize the structural properties of materials during cyclic tests has been developed for the neutron diffractometers at J-PARC. Using this technique, diffracted neutrons and the applied cyclic conditions are recorded as event data together with time information. The amplitude and phase of the conditions of all recorded neutron signals can be specified by using the characteristics of the event data. By adopting the developed technique, the behaviors of the crystal lattice and domains of the piezoelectric material in a multilayer-type piezoelectric actuator driven by a cyclic electric field were evaluated. The developed technique enabled the collection and processing of diffraction data for all levels of the applied electric field, as opposed to only the highest and lowest levels. The variation in diffraction intensity during the application of a cyclic electric field was obtained successfully, and the hysteresis-like behaviors of both the lattice strain and the 90° domain switching were revealed.

Loading Rate Effect on the Domain Switching of Ferroelectric Materials

2008 ◽  
Author(s):  
Ajit Achuthan ◽  
Chin-Teh Sun
Keyword(s):  
Electric Field ◽  
Loading Rate ◽  
Domain Switching ◽  
Underlying Mechanism ◽  
Ferroelectric Materials ◽  
Switching Behavior ◽  
Switching Mechanism ◽  
Two Factors ◽  
Different Characteristics ◽  
Butterfly Behavior

A method to characterize the strain electric field butterfly behavior based on the underlying domain switching mechanism is presented at first. The effect of loading rate on the different characteristics of the strain electric-field-butterfly behavior is then studied. By comparing the changes in these characteristics under different loading rates, it is established that the loading rate dependence of the strain electric field butterfly behavior is mainly due to two factors, 1) the dependence of the switching of individual domains on the magnitude and duration of the loading time and 2) the variation of the transition electric field with the loading rate. Several interesting attributes of the domain switching behavior that may shed light on understanding the underlying mechanism of domain switching further is illustrated in the present study. The present study also demonstrates that the method of characterizing the strain electric butterfly based on the underlying domain switching mechanism is very effective in studying ferroelectric behavior under different loading conditions.

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