Accession Number : ADA267588


Title :   Electrorheological (ER) Fluids: A Research Needs Assessment


Corporate Author : CONSULTEC SCIENTIFIC INC KNOXVILLE TN


Personal Author(s) : Krieger, Irvin M ; Collins, Edward A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267588.pdf


Report Date : May 1993


Pagination or Media Count : 360


Abstract : In 1947, Willis Winslow was awarded a U.S. patent on 'Methods and Means for Translating Electrical Impulse Into Mechanical Forces'. Winslow's patent makes use of an electrorheological (ER) fluid, i.e., one which is transformed from a liquid into a viscoelastic solid upon application of a strong electric field. Based on this gelation effect, a whole new technology has been proposed, providing novel and efficient ways to control fluid flow and power transmission, and to reduce energy loss and damage due to vibration and oscillation. A large number and variety of ER devices have been invented; they are described in publications and patents, and many exist as prototype and demonstration devices. ER devices such as shock absorbers, valves, transmissions and fluid couplings are more energy-efficient than hydraulic, mechanical or electromechanical devices which serve the same function. The power needed to operate and ER device is usually very low compared to the power controlled by the device, and its response can be almost instantaneous


Descriptors :   *ELECTRIC FIELDS , *RHEOLOGY , *FLUIDS , STABILITY , VIBRATION , DAMAGE , LIQUIDS , CIRCUITS , HYDRAULICS , GELATION , TRANSMISSIONS(MECHANICAL) , COLLOIDS , OSCILLATION , VALVES , SOLIDS , MECHANICS , VISCOELASTICITY , ENERGY , SHOCK ABSORBERS , THERMAL STABILITY


Subject Categories : Electricity and Magnetism
      Fluid Mechanics
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE