scholarly journals THE EFFECT OF ELECTRIC FIELD DIRECTION ON THE-SHEAR STRESS OF ER FLUIDS

1996 ◽  
Vol 45 (4) ◽  
pp. 640
Author(s):  
WANG ZUO-WEI ◽  
LIN ZHI-FANG ◽  
TAO RUI-BAO
Keyword(s):  
Shear Stress ◽  
Electric Field ◽  
Field Direction ◽  
Electric Field Direction ◽  
Er Fluids

scholarly journals Polarization independence of laser-induced nucleation in supersaturated aqueous urea solutions

2017 ◽  
Vol 19 (5) ◽  
pp. 3464-3467 ◽  
Author(s):  
Yao Liu ◽  
Martin R. Ward ◽  
Andrew J. Alexander
Keyword(s):  
Electric Field ◽  
Field Direction ◽  
Current Understanding ◽  
Crystal Axis ◽  
Electric Field Direction ◽  
Aqueous Urea

Imaging reveals no alignment of urea crystal axis with the electric field direction, contrary to current understanding of laser-induced nucleation.

Impact of Antenna Design on the Electric-Field Direction Sensitivity of Zero-Biased Y–Ba–Cu–O Detectors to Ultra-Short THz Pulses

2019 ◽  
Vol 29 (5) ◽  
pp. 1-5
Author(s):  
Alexander Schmid ◽  
Artem Kuzmin ◽  
Johannes L. Steinmann ◽  
Juliane Raasch ◽  
Stefan Wuensch ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Direction ◽  
Antenna Design ◽  
Electric Field Direction ◽  
Direction Sensitivity

Functional oxide films with engineered ferroelectric properties

2013 ◽  
Vol 1507 ◽  
Author(s):  
R. Wördenweber ◽  
T. Ehlig ◽  
J. Schubert ◽  
R. Kutzner ◽  
E. Hollmann
Keyword(s):  
Electric Field ◽  
Room Temperature ◽  
Dipole Moments ◽  
Ferroelectric Properties ◽  
Field Direction ◽  
Complex Dielectric Constant ◽  
Electric Field Direction ◽  
Relaxation Experiments ◽  
Polar Nanoregions ◽  
The Given

ABSTRACTThe ferroelectric properties of anisotropically strained SrTiO3 films are analyzed by detailed measurements of the complex dielectric constant as function of temperature, frequency, bias voltage and electric field direction. The strain induces a relaxor-ferroelectric phase that persists up to room temperature. However, transition temperature and ferroelectric properties strongly depend on the orientation of the electric field and therefore on the amount of structural strain in the given electric field direction. Frequency and time dependent relaxation experiments reveal the presence and properties of polar nanoregions with randomly distributed directions of dipole moments in the film.

Simulated Behavior of a System With Base Excitation Using an Electrorheological Fluid Damper

1993 ◽  
Author(s):  
Paul N. Rieder ◽  
John A. Tichy
Keyword(s):  
Shear Stress ◽  
Electric Field ◽  
Vibration Isolation ◽  
Fluid Model ◽  
Electrorheological Fluid ◽  
Isolation System ◽  
Yield Shear Stress ◽  
Linear Behavior ◽  
Two Parameters ◽  
Er Fluids

Abstract The flow properties of electrorheological (ER) fluids change with the application of an electric field. Presently, these materials are a novelty with few direct applications, but they have drawn considerable interest. Proposed applications include lubricants, dampers, clutches, brakes, etc. Existing ER fluids are best described by the Bingham fluid model. The Bingham material is described by two parameters, a yield shear stress and a viscosity. When the shear stress magnitude exceeds the yield shear stress, quasi-Newtonian flow results; otherwise the material is rigid. For many ER fluids, the yield shear stress is proportional to the square of the applied electric field. In the present study, the Bingham model is applied to a rectangular flow channel. A rigid core forms midway across the film, the core thickness being proportional to the yield shear stress. The damper force is predicted as a function of a dimensionless parameter which depends on the yield shear stress, the flow rate, and channel geometry. Calculations are performed for a simple vibration isolation system. Such a system may represent a smart shock absorber to minimize vibration response to oscillation input from a bumpy road. The ER damper is shown to be effective in isolating vibration within a band of linear behavior.

THE ELECTRORHEOLOGICAL FLUIDS WITH HIGH SHEAR STRESS

2005 ◽  
Vol 19 (07n09) ◽  
pp. 1065-1070 ◽  
Author(s):  
KUNQUAN LU ◽  
RONG SHEN ◽  
XUEZHAO WANG ◽  
GANG SUN ◽  
WEIJIA WEN
Keyword(s):  
Shear Stress ◽  
Electric Field ◽  
Yield Stress ◽  
High Performance ◽  
Electrorheological Fluids ◽  
Stress Effect ◽  
High Shear ◽  
High Shear Stress ◽  
Effective Factors ◽  
Er Fluids

A series of high performance ER fluids newly manufactured in our laboratory are presented. The yield stress of those ER fluids can reach several tens of kPa, 100 kPa and even 200 kPa, respectively. For understanding the high shear stress effect a model is proposed base on the electric field induced molecular bounding effect. The main effective factors in fabricating the high performance ER are discussed.

Domain configuration and crystal structure of Pb(Zn1/3Nb2/3)O3–5%PbTiO3 crystals as a function of the electric-field direction

2002 ◽  
Vol 91 (7) ◽  
pp. 4474-4478 ◽  
Author(s):  
Jung-Kun Lee ◽  
Jae Yun Yi ◽  
Kug-Sun Hong ◽  
Seung-Eek Park ◽  
Jorge Millan
Keyword(s):  
Crystal Structure ◽  
Electric Field ◽  
Field Direction ◽  
Electric Field Direction ◽  
Domain Configuration
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