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Abstract

We validate and assess the applicability of an Eyring constitutive model. The Bingham plastic model has a zero shear rate discontinuity, which leads to inaccuracies in modeling and simulation, and is characterized by two rheological constants for a constant field: yield stress and postyield viscosity. The Eyring model has a smooth transition through the zero shear rate condition, and also has two rheological constants for a constant field. An electrorheological (ER) damper having a damping level comparable to a shock absorber for a small-sized passenger car damper is manufactured, and its performance is predicted using the Eyring model. To accurately identify the rheological parameters of the Eyring model, a parameter identification method was used. The damping force versus piston displacement and velocity behaviors of the ER damper are experimentally measured with respect to applied electric field and excitation frequency. To validate the Eyring model, the experimental results are compared with predictions in the damping force versus piston displacement and velocity behaviors.

Keywords

electrorheological fluid magnetorheological fluid Bingham plastic Eyring damper

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References

Bitman, L. , Choi, Y.-T. and Wereley, N.M. 2002. “Electrorheological Damper Analysis Using an Eyring Constitutive Relationship,” SPIE Conference on Damping and Isolation, San Diego CA, 17-21, March, Paper No. 4697-37.

Choi, S.B. , Choi, Y.T. , Chang, E.G. , Han, S.J. and Kim, C.S. 1998. “Control Characteristics of a Continuously Variable ER Damper,” Mechatronics, 8:143-161.

Han, S.S. , Choi, S.B. and Cheong, C.C. 2000. “Position Control X-Y Table Mechanism Using Electro-Rheological Clutches,” Mechanism and Machinery Theory, 35:1563-1577.

Hiemenz, G.J. and Wereley, N.M. 1999. “Seismic Response of Civil Structures Utilizing Semi-Active MR and ER Bracing Systems,” J. of Intelligent Material Systems and Structures, 10(8):646-651.

Kamath, G. , Hurt, M. and Wereley, N.M. 1996. “Analysis and Testing of Bingham Plastic Behavior In Semi-Active Electrorheological Fluid Dampers,” Smart Materials and Structures, 5:576-590.

Van Wazer, J.R. , Lyons, J.W. , Kim, K.Y. and Colwell, R.E. 1963. Viscosity and Flow Measurement, Interscience Publishers, John Wiley and Sons, Inc., New York.

Wereley, N.M. and Pang, L. 1998. “Nondimensional Analysis of Semi-Active Electrorheological and Magnetorheological Dampers Using Approximate Parallel Plate Models,” Smart Materials and Structures, 7:732-743.

Whittle, M. , Firoozian, R. and Bullough, W.A. 1994. “Decomposition of the Pressure in an ER Valve Control System,” J. of Intelligent Material Systems and Structures, 5(1):105-111.

Williams, S. , Rigby, S.G. , Sproston, J.L. and Stanway, R. 1993. “Electrorheological Fluids Applied to as Automotive Engine Mount,” J. of Non-Newtonian Fluid Mechanics, 47:221-238.