Material characterization of ER fluids at high frequency

In this paper, the material characterization of ER fluids at high frequencies is studied. To characterize the properties at high frequencies, an experimental apparatus is provided, based upon the wave transmission through ER fluids in the presence of electric field. Details of the experiment and how to extract the complex shear modulus of ER fluids are addressed. A moderate increase in the storage modulus and loss modulus was observed when the weight ratio of ER particles and the electric field were increased. The proposed method is a comprehensive material characterization of ER fluids in high frequencies for ER smart structures.