Results 121 to 130 of about 385 (175)
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2007
"Smart" materials can adaptively change or respond to an external stimulus producing a useful effect. Mechanical stresses, temperature, electric or magnetic fields, photon radiation or chemicals are typical examples of stimuli. A useful effect usually means a dramatic change of either one physical property (mechanical, electrical, appearance), the ...
Hutter, Kolumban +2 more
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"Smart" materials can adaptively change or respond to an external stimulus producing a useful effect. Mechanical stresses, temperature, electric or magnetic fields, photon radiation or chemicals are typical examples of stimuli. A useful effect usually means a dramatic change of either one physical property (mechanical, electrical, appearance), the ...
Hutter, Kolumban +2 more
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Science, 1992
Suspensions of polarizable particles in nonpolarizable solvents form fibrillated structures in strong electric fields. The resulting increase in viscosity of these "electrorheological" fluids can couple electrical to hydraulic components in a servomechanism. The physical properties of these fluids are unusual owing to the long-range, anisotropic nature
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Suspensions of polarizable particles in nonpolarizable solvents form fibrillated structures in strong electric fields. The resulting increase in viscosity of these "electrorheological" fluids can couple electrical to hydraulic components in a servomechanism. The physical properties of these fluids are unusual owing to the long-range, anisotropic nature
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Russian Journal of General Chemistry, 2010
Advances in one of the most promising fields of the chemistry of smart materials, specifically, electrorheological fluids are considered. The electrorheological effect and the structure and properties of electrorheological fluids are described. Modern views on the nature of the electrorheological effect are considered.
A. V. Agafonov, A. G. Zakharov
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Advances in one of the most promising fields of the chemistry of smart materials, specifically, electrorheological fluids are considered. The electrorheological effect and the structure and properties of electrorheological fluids are described. Modern views on the nature of the electrorheological effect are considered.
A. V. Agafonov, A. G. Zakharov
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Boundary effect in electrorheological fluids
Physical Review E, 2011The effect of the boundary friction coefficient on the rheological properties of the electrorheological (ER) fluids in quasistatic and dynamic states is investigated by computer simulation. The relation between the shear stress and the boundary friction coefficient in quasistatic and dynamic states is discussed qualitatively and quantitatively, and the
X L, Gong +5 more
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Electro-osmosis of electrorheological fluids
Physical Review E, 2013Electrorheological fluids are suspensions that are characterized by a strong functional dependence of the constitutive behavior of the fluids on the electric field. In this work, we consider electro-osmosis of an electrorheological fluid through a channel where a transverse, nonuniform electric field is spontaneously induced due to the presence of an ...
Jayabrata, Dhar +2 more
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Analysis of giant electrorheological fluids
Journal of Colloid and Interface Science, 2013The yield stress dependence on electric field strength for giant electrorheological (GER) fluids over the full range of electric fields was examined using Seo's scaling function which incorporated both the polarization and the conductivity models. If a proper scaling was applied to the yield stress data to collapse them onto a single curve, the Seo's ...
Youngwook P, Seo, Yongsok, Seo
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Electrorheological fluids: structures and mechanisms
Soft Matter, 2008Electrorheology denotes the control of a colloid's flow properties through an electric field. We delineate the basic characteristics of electrorheological (ER) fluids, and show that the use of an effective dielectric constant concept can yield quantitative predictions.
Wen, Weijia +2 more
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Fluids with Transverse Isotropy as Models for Electrorheological Fluids
ZAMM, 1998Summary: In electrorheological fluids (ER-fluids) fibers are formed upon application of an electric field. This renders the fluid transversely isotropic. Studying transverse isotropy from a purely phenomenological point of view in its simplest form reveals that yield stresses have to be reckoned with, be they shear stresses or normal stresses.
Brunn, P. O., Abu-Jdayil, B.
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Electrorheological effects of polyaniline‐type electrorheological fluids
Journal of Applied Polymer Science, 2002AbstractThree kinds of particles—polyaniline (PANI), poly(o‐toludine) (POT), and brominated polyaniline (Br‐PANI)—were synthesized. With chlorinated paraffin as a disperse oil, their electrorheological (ER) effects were determined so that the influence of the phenyl substitute group on the ER effects could be considered.
Liucheng Zhang, Kai Su, Xiucuo Li
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MULTISCALE ANALYSIS OF ELECTRORHEOLOGICAL FLUIDS
International Journal of Modern Physics B, 2002We construct a microscale model for a rigid particle suspension in a viscous fluid that includes Maxwell electrostatic forces. Via homogenization techniques we characterize the properties the material exhibits at the macroscale. The change in the effective constitutive equations is due to the highly oscillating electrostatic forces.
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