The Effect of Conductive Fragments on Electrorheological Properties

  • SAKURAI Ryo
    Research and Development Division, Bridgestone Corporation
  • SEE Howard
    Research and Development Division, Bridgestone Corporation
  • SAITO Tasuku
    Research and Development Division, Bridgestone Corporation

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  • Effect of Conductive Fragments on Elect

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We have carried out a set of experiments to determine the effect of adding small amounts of conductive carbon black fragments to an electrorheological fluid consisting of a dispersion of anhydrous carbonaceous particles. We find that there is a large reduction in the shear stress under an electric field as the concentration of conductive fragments is increased, and an accompanying increase in the electric current. This decrease in shear stress is different to that caused by a broad distribution of particulate conductivity, investigated in a previous work. We explain this behavior by a simple model based on the “bouncing motion” of the conductive fragments, where there is a transfer of charge by the fragments oscillating across the electrode gap.

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