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Apparent stress-strain relationships in experimentalequipment where magnetorheological fluids operate undercompression mode

Mazlan, Saiful Amri (2008) Apparent stress-strain relationships in experimentalequipment where magnetorheological fluids operate undercompression mode. In: School Of Mechanical and Manufacturing Engineering, 2008, Dublin City University, Glasnevin.

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Abstract

This paper presents an experimental investigation of two different magnetorheological (MR) fluids, namely water-based and hydrocarbon-based MR fluids in compression mode under various applied currents. Finite Element Method Magnetics was used to predict the magnetic field distribution inside the MR fluids generated by a coil. A test rig was constructed where the MR fluid was sandwiched between two parallel cylinders. During the compression, the upper cylinder was moved towards the lower cylinder in a vertical direction. Stress-strain relationships were obtained for arrangements of equipment where each type of fluid was involved, using compression test equipment. The apparent compressive stress was found to be increased with the increase in magnetic field strength. In addition, the apparent compressive stress of the water-based MR fluid showed a response to the compressive strain of greater magnitude. However, during the compression process, the hydrocarbon-based MR fluid appeared to show a unique behaviour where an abrupt pressure drop was discovered in a region where the apparent compressive stress would be expected to increase steadily. The conclusion is drawn that the apparent compressive stress of MR fluids is influenced strongly by the nature of the carrier fluid and by the magnitude of the applied current.

Item Type:Conference or Workshop Item (Paper)
Subjects:Unspecified
Divisions:Others
ID Code:19788
Deposited By: Liza Porijo
Last Modified:15 Dec 2011 08:05

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