Mechanical Properties of an Ideal Electrorheological Fluid: Metal-Particle/Insulating Oil System

The electrorheological properties of a model system consisting of metal particles with insulating coating in a dielectric oil are analyzed by extending Rayleigh identity based on a multipole expansion theory. Evaluation of the effective dielectric constant is emphasized. The dependence of the shear stress т on the shear strain θ and the shear modulus G for the electrorheological solid is presented. It is found that the model system shows much higher electrorheological performance than the traditional suspensions.