Electrorheological fluids in dynamic squeeze: an improved modeling technique with experimental validation

Ali K. El-Wahed; Roger Stanway; John L. Sproston

doi:10.1117/12.472650

27 June 2002 Electrorheological fluids in dynamic squeeze: an improved modeling technique with experimental validation

Ali K. El-Wahed, Roger Stanway, John L. Sproston

Proceedings Volume 4697, Smart Structures and Materials 2002: Damping and Isolation; (2002) https://doi.org/10.1117/12.472650
Event: SPIE's 9th Annual International Symposium on Smart Structures and Materials, 2002, San Diego, California, United States

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.

Citation Download Citation

Ali K. El-Wahed, Roger Stanway, and John L. Sproston "Electrorheological fluids in dynamic squeeze: an improved modeling technique with experimental validation", Proc. SPIE 4697, Smart Structures and Materials 2002: Damping and Isolation, (27 June 2002); https://doi.org/10.1117/12.472650

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