Dynamic Test Apparatus for Electro-Rheological Fluids.
Patent Application, Filed 16 Sep 91,
DEPARTMENT OF THE NAVY WASHINGTON DC
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The present invention relates to apparatus for determining the dynamic mechanical properties of an electro rheological ER fluid as a function of frequency, voltage, and temperature. The measured properties can then be used to characterize the effectiveness and behavior of the ER fluids for various engineering applications. Most ER fluid test methods do not allow for property characterization as a function of high frequencies or temperature. A general purpose and object of the invention is to provide a device able to perform dynamic material measurements of ER fluids over a broad range of temperatures and frequencies and to much higher levels than heretofore employed. Other advantages associated with this invention are that it is economical, simple, easy to manufacture, and easy to clean and operate. The size of the invention may be varied depending on the apparatus used to drive it and any variety of materials could be used to build it.
- Electrical and Electronic Equipment