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Journal of Engineering Materials and Technology | Volume 128 | Issue 2 | Research Paper
RESEARCH PAPERS

Magnetorheological Fluid Behavior Under Constant Shear Rates and High Magnetic Fields Over Long Time Periods

[+] Author and Article Information
Constantin Ciocanel

 The University of Toledo, College of Engineering, 2801 W. Bancroft, Toledo, Ohio 43606cciocane@eng.utoledo.edu

Kevin Molyet, Hideki Yamamoto, Sheila L. Vieira, Nagi G. Naganathan

 The University of Toledo, College of Engineering, 2801 W. Bancroft, Toledo, Ohio 43606

J. Eng. Mater. Technol 128(2), 163-168 (Aug 29, 2005) (6 pages) doi:10.1115/1.2172276 History: Received March 21, 2005; Revised August 29, 2005
Article
References
Figures
Citing Articles

This paper presents a new magnetorheological (MR) cell design along with a study of the magnetic field, shear rate, and time/shear strain influences on the properties and behavior of a MR fluid tested for long periods of time. The MR cell was designed to adapt a commercially available rheometer to measure the rheological properties of the fluid. Overall characteristics of the designed MR cell output capability are provided. Constant shear rate tests, two hours in duration, have been performed at shear rates between 0.1l∕s and 200l∕s under magnetic field intensities up to 0.4T. The rheological measurements indicated that over time the fluid’s shear stress magnitude decreases until it reaches a steady state. The time required to reach the steady state depends on both the magnetic field strength and the shear rate. The higher the field and the smaller the shear rate the shorter the time for the steady state to be reached.
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Copyright © 2006 by American Society of Mechanical Engineers
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References

1
Tanaka, K., Nakamura, K., Takada, K., Iwaki, F., Kubono, A., Akiyama, R., and Kuramoto, N., 1998, “Effects of Chance of Collision Among Particles on Electro-Rheological Response,” "Proceedings of the 6th International Conference on Electro-Rheological Fluids, Magneto-Rheological Suspensions and Their Applications", M.Nakano and K.Koyama eds., World Scientific, Singapore, pp. 172–179.
2
Filisko, F. E., Henley, S., and Quist, G., 1998, “Recent Developments in the Properties and Composition of ER Fluids,” "Proceedings of the 4th International Conference on Intelligent Materials", T.Takagi, M.Aizawa, T.Okano, and N.Shinya eds., Tokyo, Intelligent Materials Forum, The Society of Non-traditional Technology, pp. 114–117.
3
Henley, S., and Filisko, F. E., 1999, “Flow Profiles of Electrorheological Suspensions: An Alternative Model for ER Activity,” J. Rheol.  [CrossRef]43  (5), pp. 1323–1336.
4
Vieira, S. L., Nakano, M., Henley, H., Filisko, F. E., Pompeo Neto, L. B., and Arruda, A. C. F., 2000, “Transient Behavior of the Microstructure of Electrorheological Fluids in Shear Flow Mode,” "Proceedings of the 7th International Conference on Electro-Rheological Fluids and Magneto-Rheological Suspensions", R.Tao and S.Shaw, eds., World Scientific, Singapore, pp. 154–162.
5
Vieira, S. L., Pompeo Neto, L. B., and Arruda, A. C. F., 2000, “Transient Behavior of an Electrorheological Fluid in Shear Flow Mode,” J. Rheol.  [CrossRef]44  (5), pp. 1139–1149.
6
Pompeo Neto, L. B., Vieira, S. L., and Arruda, A. C. F., 2001, “Evolution of a Governing Equation for the Macroscopic Dynamics of Electrorheological Fluids,” J. Appl. Phys.  [CrossRef], 89  (8), pp. 4657–4663.
7
Pompeo Neto, L. B., Arruda, A. C. F., and Vieira, S. L., 2002, “Prediction of the Dynamics of Electrorheological Fluids,” "Proceedings of the 8th International Conference on Electro-Rheological Fluids and Magneto-Rheological Suspensions", G.Bossis, ed., World Scientific, Singapore, pp. 794–798.
8
Zhu, Y., McNeary, M., Brealin, N., and Liu, J., 1998, “Effects of Structures on the Rheology in a Model Magnetorheological Fluid,” "6th International Conference on Electro-Rheological Fluids, Magneto-Rheological Suspensions and Their Applications", M.Nakano, and K.Koyama, eds., World Scientific, Singapore, pp. 478–485.
9
Chaker, M., Breslin, N., and Liu, J., 2000, “Influence on Rheology of Static and Dynamic Structures in Model Magnetorheological Fluids,” "Proceedings of the 7th International Conference on Electro-Rheological Fluids and Magneto-Rheological Suspensions", R.Tao and S.Shaw, eds., World Scientific, Singapore, pp. 366–373.
10
Ogawa, C., Masubuchi, Y., Takimoto, J.-I., and Koyama, K., 2000, “Domain Structure and MR Effect of Ferrofluid Emulsion,” "Proceedings of the 7th International Conference on Electro-Rheological Fluids and Magneto-Rheological Suspensions", R.Tao and S.Shaw, eds., World Scientific, Singapore, pp. 339–343.
11
Schramm, G., 1994, "A Practical Approach to Rheology and Rheometry", Gebrueder Haake GmbH, Karlsruhe, Federal Republic of Germany, pp. 83–91.

Figures

Grahic Jump Location
+Lamellar formations of ER/MR particles formed under electric/magnetic field and shear proposed by Henley and Filisko (3)
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Lamellar formations of ER/MR particles formed under electric/magnetic field and shear proposed by Henley and Filisko (3)
Figure 1

Lamellar formations of ER/MR particles formed under electric/magnetic field and shear proposed by Henley and Filisko (3)

Grahic Jump Location
+Custom-designed rheometric cell
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Custom-designed rheometric cell
Figure 2

Custom-designed rheometric cell

Grahic Jump Location
+Magnetic field variation within the MR fluid, measured along the radius from the center of the plate
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Magnetic field variation within the MR fluid, measured along the radius from the center of the plate
Figure 3

Magnetic field variation within the MR fluid, measured along the radius from the center of the plate

Grahic Jump Location
+Magnetic field at the center of the MR cell versus the current passing through the coil
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Magnetic field at the center of the MR cell versus the current passing through the coil
Figure 4

Magnetic field at the center of the MR cell versus the current passing through the coil

Grahic Jump Location
+Magnetic field distribution inside the MR fluid for i=2.3A
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Magnetic field distribution inside the MR fluid for i=2.3A
Figure 5

Magnetic field distribution inside the MR fluid for i=2.3A

Grahic Jump Location
+Hysteresis curves of shear stress as a function of shear rate at 0.4T magnetic field
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Hysteresis curves of shear stress as a function of shear rate at 0.4T magnetic field
Figure 6

Hysteresis curves of shear stress as a function of shear rate at 0.4T magnetic field

Grahic Jump Location
+(a) Shear stress as a function of time in the absence of a magnetic field; (b) Region 0–600s expanded
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(a) Shear stress as a function of time in the absence of a magnetic field; (b) Region 0–600s expanded
Figure 7

(a) Shear stress as a function of time in the absence of a magnetic field; (b) Region 0–600s expanded

Grahic Jump Location
+Shear stress versus time for various shear rates
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Shear stress versus time for various shear rates
Figure 8

Shear stress versus time for various shear rates

Grahic Jump Location
+Shear stress versus shear strain at various shear rates
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Shear stress versus shear strain at various shear rates
Figure 9

Shear stress versus shear strain at various shear rates

Grahic Jump Location
+First normal stress difference versus time
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First normal stress difference versus time
Figure 10

First normal stress difference versus time

Grahic Jump Location
+The MR fluid’s appearance at the end of the test
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The MR fluid’s appearance at the end of the test
Figure 11

The MR fluid’s appearance at the end of the test

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