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Apparent stress-strain relationships in experimental equipment where magnetorheological fluids operate under compression mode

Mazlan, SA and Ekreem, NB and Olabi, Abdul (2008) Apparent stress-strain relationships in experimental equipment where magnetorheological fluids operate under compression mode. Journal of Physics D: Applied Physics, 41 (9). ISSN 1361-6463

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Abstract

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 flat surfaces. During the compression, the upper surface was moved towards the lower surface 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:Article (Published)
Refereed:Yes
Additional Information: Article Number: 095002
Uncontrolled Keywords:SQUEEZE-FILM DAMPER; ELECTRORHEOLOGICAL FLUID; ELONGATION
Subjects:Engineering > Materials
Engineering > Mechanical engineering
DCU Faculties and Centres:UNSPECIFIED
Publisher:Institute of Physics
Official URL:http://dx.doi.org/10.1088/0022-3727/41/9/095002
Copyright Information:© 2008 Institute of Physics. Final publisher copy available here... http://dx.doi.org/10.1088/0022-3727/41/9/095002
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:16052
Deposited On:12 May 2011 11:41 by Abdul Olabi. Last Modified 12 May 2011 11:41

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