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Proceedings Paper

Electrorheological fluids in dynamic squeeze: an improved modeling technique with experimental validation
Author(s): Ali K. El-Wahed; Roger Stanway; John L. Sproston
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Paper Abstract

It is now widely accepted that smart fluids in the so-called squeeze-flow mode have many potential applications in vibration damping and isolation. In squeeze-flow the fluid is subjected to forces imposed by oscillating electrodes (or poles) which alternatively subject the fluid to tensile and compressive loading. Consequently displacement levels are limited to a few millimeters but large force levels are available. Modeling of smart fluid squeeze-flow devices is a complex process, primarily since the fluid is liable to be subjected to simultaneous changes in the inter-electrode gap and the strength of the applied electric (or magnetic) field. Consequently the authors have developed a comprehensive test facility dedicated to the study of smart fluids in dynamic squeeze-flow operation. In the present paper, the authors will describe a new approach to modeling smart fluids in squeeze-flow. The analysis relates specifically to an electrorheological fluid modeled using a bi- viscous shear stress/shear strain characteristics. By assuming that the electrically stressed fluid has a yield stress which is dependent on the strain direction, it will be shown how the model is able to account for observed experimental behavior.

Paper Details

Date Published: 27 June 2002
PDF: 9 pages
Proc. SPIE 4697, Smart Structures and Materials 2002: Damping and Isolation, (27 June 2002); doi: 10.1117/12.472650
Show Author Affiliations
Ali K. El-Wahed, Univ. of Dundee (United Kingdom)
Roger Stanway, Univ. of Sheffield (United Kingdom)
John L. Sproston, Univ. of Liverpool (United Kingdom)

Published in SPIE Proceedings Vol. 4697:
Smart Structures and Materials 2002: Damping and Isolation
Gregory S. Agnes, Editor(s)

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