Sage Journals: Discover world-class research

Abstract

Electrorheological (ER) and magnetorheological (MR) fluid-based dampers are typically analyzed using Bingham-plastic shear flow analysis under quasi-steady fully developed flow conditions. An alternative perspective, supported by measurements reported in the literature, is to allow for post-yield shear thinning and shear thickening. A Herschel-Bulkley constitutive shear flow relationship can be used to account for such post-yield shear thinning or thickening behavior. Depending on the value of the flow behavior index number, varying degrees of post-yield shear thickening or thinning behavior can be analyzed. A nominal ER bypass damper is considered. Damping forces are analyzed by approximating the annular geometry of the ER/MR valve by parallel plates. The impact of the flow behavior index on the shear stress vs. shear rate behavior and velocity profile are also examined numerically as a function of applied electric field. Analytical damping predictions are compared using the nonlinear Bingham-plastic and Herschel-Bulkley analyses.

Get full access to this article

View all access options for this article.

References

l. Duclos, T.G. 1988. "Design of Devices Using Electrorheological Fluids," SAE Paper 881134, pp. 2.532-2.536.

2. Brooks, D.A. 1992. "Design and Development of Flow Based Electro-Rheological Devices," International Journal of Modern Physics B, 6, pp. 2705-2730.

3. Stanway, R. , J.L. Sproston , and A.K. El-Wahed . 1996. "Application of Electrorheological Fluids in Vibration Control: A Survey," Smart Materials and Structures, 5(4), pp. 464-482.

4. Kamath, G.M. , M.K. Hurt , and N.M. Wereley . 1996. "Analysis and Testing of Bingham Plastic Behavior in Semi-Active Electrorheological Fluid Dampers," Smart Materials and Structures, 5(5), pp. 576-590.

5. Wereley, N.M. and Li Pang . 1998. "Nondimensional Analysis of Semi-Active Electrorheological and Magnetorheological Dampers Using Approximate Parallel Plate Models," Smart Materials and Structures 7(5), pp. 732-743.

6. Klotz, J.A. and W.E. Brigham . 1998. "To Determine Herschel-Bulkley Coefficients," Journal of Petroleum Technology, November, pp. 80-81.

7. Wolff-Jesse, C. and G. Fees . 1998. "Examination of Flow Behavior of Electrorheological Fluids in the Flow Mode," Proceedings of the Institution of Mechanical Engineers, Journal of Systems and Control Engineering, 212(Part I), pp. 159-173.

8. Marksmeier, T.M. , E.L. Wang , and F. Gordaninejad . 1998. "An Electro-Rheological Grease (ERG) Shock Absorber," Journal of Intelligent Material Systems and Structures, Vol. 9, No. 9, pp. 693-703.

9. Lou, Z. , R.D. Ervin , and F.E. Filisko . 1993. "A Preliminary Parametric Study of Electrorheological Dampers," Electro-Rheological Flows, ASME, FED-Vol. 164, pp. 143-156.

10.

10. Skelland, A.H.P. 1967. Non-Newtonian Flow and Heat Transfer, John Wiley and Sons, Inc., New York.

11.

11. Phillips, R.W. 1969. "Engineering Applications of Fluids with a Variable Yield Stress," Ph.D. Thesis, Mechanical Engineering, U. California at Berkeley.

12.

12. Leek, T.H. , S. Lingard , W.A. Bullough , and R.J. Atkin . 1994. "Hydrodynamic Pressure Generation with an Electrorheological Fluid-Part I Unexcited Fluid," Electrorheological Fluids: Mechanisms, Properties, Technology and Applications, pp. 609-624, World Scientific, New Jersey.

13.

13. Kamath, G.M. and N.M. Wereley. 1997. "Modeling the Damping Mechanism in Electrorheological Fluid Based Dampers," in M3DIII: Mechanics and Mechanisms of Material Damping, edited by V.K. Kinra and A. Wolfenden , American Society for Testing and Materials, pp. 331-348 (STP1304).

14.

14. Bayer AFG. 1997. "Rheobay Electrorheological Fluid: Provisional Product Information."

Quasi-Steady Herschel-Bulkley Analysis of Electroand Magneto-Rheological Flow Mode Dampers

Abstract

Get full access to this article

References