Effect of pressure on the physical properties of magnetorheological fluids
To date, several applications of magnetorheological (MR) fluids are present in the industrial world, nonetheless system requirements often needs better material properties. In technical literature a previous work shows that MR fluids exhibit a pressure dependency called squeeze strengthen effect. Si...
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Gruppo Italiano Frattura
2013-01-01
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Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero23/numero_23_art_8.pdf |
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doaj-0494bcab2c2945248c54261308d27fef2020-11-24T20:52:13ZengGruppo Italiano FratturaFrattura ed Integrità Strutturale1971-89932013-01-017237586Effect of pressure on the physical properties of magnetorheological fluids A. SpaggiariE. DragoniTo date, several applications of magnetorheological (MR) fluids are present in the industrial world, nonetheless system requirements often needs better material properties. In technical literature a previous work shows that MR fluids exhibit a pressure dependency called squeeze strengthen effect. Since a lot of MR fluid based devices are rotary devices, this paper investigates the behaviour of MR fluids under pressure when a rotation is applied to shear the fluid. The system is designed in order to apply both the magnetic field and the pressure and follows a Design of Experiment approach. The experimental apparatus comprises a cylinder in which a piston is used both to apply the pressure and to shear the fluid. The magnetic circuit is designed to provide a nearly constant induction field in the MR fluid. The experimental apparatus measures the torque as a function of the variables considered and the yield shear stress is computed. The analysis of the results shows that there is a positive interaction between magnetic field and pressure, which enhances the MR fluid performances more than twice.http://www.gruppofrattura.it/pdf/rivista/numero23/numero_23_art_8.pdfMagnetorheological fluidsShear modePressureDesign of experiment |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
A. Spaggiari E. Dragoni |
spellingShingle |
A. Spaggiari E. Dragoni Effect of pressure on the physical properties of magnetorheological fluids Frattura ed Integrità Strutturale Magnetorheological fluids Shear mode Pressure Design of experiment |
author_facet |
A. Spaggiari E. Dragoni |
author_sort |
A. Spaggiari |
title |
Effect of pressure on the physical properties of magnetorheological fluids |
title_short |
Effect of pressure on the physical properties of magnetorheological fluids |
title_full |
Effect of pressure on the physical properties of magnetorheological fluids |
title_fullStr |
Effect of pressure on the physical properties of magnetorheological fluids |
title_full_unstemmed |
Effect of pressure on the physical properties of magnetorheological fluids |
title_sort |
effect of pressure on the physical properties of magnetorheological fluids |
publisher |
Gruppo Italiano Frattura |
series |
Frattura ed Integrità Strutturale |
issn |
1971-8993 |
publishDate |
2013-01-01 |
description |
To date, several applications of magnetorheological (MR) fluids are present in the industrial world, nonetheless system requirements often needs better material properties. In technical literature a previous work shows that MR fluids exhibit a pressure dependency called squeeze strengthen effect. Since a lot of MR fluid based devices are rotary devices, this paper investigates the behaviour of MR fluids under pressure when a rotation is applied to shear the fluid. The system is designed in order to apply both the magnetic field and the pressure and follows a Design of Experiment approach. The experimental apparatus comprises a cylinder in which a piston is used both to apply the pressure and to shear the fluid. The magnetic circuit is designed to provide a nearly constant induction field in the MR fluid. The experimental apparatus measures the torque as a function of the variables considered and the yield shear stress is computed. The analysis of the results shows that there is a positive interaction between magnetic field and pressure, which enhances the MR fluid performances more than twice. |
topic |
Magnetorheological fluids Shear mode Pressure Design of experiment |
url |
http://www.gruppofrattura.it/pdf/rivista/numero23/numero_23_art_8.pdf |
work_keys_str_mv |
AT aspaggiari effectofpressureonthephysicalpropertiesofmagnetorheologicalfluids AT edragoni effectofpressureonthephysicalpropertiesofmagnetorheologicalfluids |
_version_ |
1716800458190749696 |