Abstract
There are known models of mechanical behaviour of electrorheological fluids (ERF) in the presence of an electric field for low-concentration suspensions subject to infinite shear strains or to small static shears not disturbing their structure. The present authors have developed a physical-mathematical model of electrorhcological effect in high-concentration ERF activated by a poor-conducting substance with a large dielectric constant. Such ERFs find more frequent application in practice.
The model takes into consideration the competition between the Maxwell tension in a disperse medium with solvation repulsion and the Maxwell pressure in a micro-nonuni form electric field between solid particles. The tension/pressure ratio specifies the strength and stability of a formed structure.
The calculated strength of a suspension layer vs. the electric intensity and time after an electric field has been applied is in agreement with experimental data.
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