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Abstract
Magnetorheological (MR) fluids are complex suspensions of magnetic particles in a non-magnetic carrier fluid. They exhibit ‘smart’ properties that enable them to change their rheological parameters in response to a change in the external magnetic field applied. This behavior is used in some engineering solutions, e.g. MR clutches or brakes. For such systems to work correctly, the resistance torque achieved by contact with the MR fluid must be properly determined. This paper demonstrates how surface roughness of a contact surface between the solid and the MR fluid affects the resistance torque value. Measurements were made on a dedicated rotational rheometer using a shear mode fluid, most closely replicating the way MR clutches and brakes work. Plate-plate geometry was used, in standard design, and modified by pasting sandpaper with different grit levels. The tests have shown that the roughness of the mating surface affects the resistance torque results.
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- Category:
- Magazine publication
- Type:
- Magazine publication
- Published in:
-
TRIBOLOGIA
no. 310,
edition 4,
pages 93 - 101,
ISSN: 0208-7774 - Publication year:
- 2024
- DOI:
- Digital Object Identifier (open in new tab) 10.5604/01.3001.0054.9833
- Verified by:
- No verification
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