Electro-stress and electron-hydraulic time delay are investigated in shear mode tests on ERF (electro-rheological fluid). These parameters are examined using a concentric, Couette clutch operating over a range of shear rates, volume fraction of solid in the ERF, and temperature. Pointers to system design, associated control strategy, fluid selection and optimal operating conditions are derived from these results.

1.
Bullough
W. A.
,
Firoozian
R.
,
Johnson
A. R.
,
Hosseini-Sianaki
A. H.
,
Makin
J.
, and
Xiao
S.
,
1992
, “
Fast Pick-Up and Drop Load Performance of a Low Electrical and Mechanical Time Constant Electro-Rheologically Based Clutch
,”
Mechatronic Systems Engineering
, Vol.
4
, pp.
315
327
.
2.
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3.
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4.
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5.
Johnson
A. R.
,
Bullough
W. A.
,
Firoozian
R.
,
Hosseini-Sianaki
A. H.
,
Makin
J.
, and
Xiao
S.
,
1992
, “
Testing on a High Speed E. R. Clutch
,”
International Journal of Modern Physics-B
, Vol.
6
, No.
15–16
, pp.
2731
2747
.
6.
Johnson
A. R.
,
Makin
J.
,
Bullough
W. A.
,
Firoozian
R.
, and
Hosseini-Sianaki
A.
,
1993
, “
Fluid Durability in a High Speed Electro-Rheological Clutch
,”
Journal of Intelligent Material Systems and Structures
, Vol.
4
, No.
4
, pp.
527
532
.
7.
Peel
D. J.
, and
Bullough
W. A.
,
1993
, “
The Effect of Flowrate, Excitation and Solids Concentration on the Time Response an Electro-Rheological Valve
,”
Journal of Intelligent Material Systems and Structures
, Vol.
4
. No.
1
, pp.
54
64
.
8.
Whittle, M., Firoozian, R., Peel, D. J., and Bullough, W. A., 1992, “A Model for the Electrical Characteristics of an ER Valve,” Journal of Modern Physics B, pp. 109–140.
9.
Weiss
K. D.
,
Carlson
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, and
Coulter
J. P.
,
1993
, “
Material Aspects of Electrorheological Systems
,”
Journal of Intelligent Material Systems and Structures
, Vol.
4
. No.
1
, pp.
13
34
.
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