The behavior of the MR fluid during durability test

The article describes results of durability test of a magnetorheological fluid (MRF), which was carried out in rheometer of own design. The rheometer design enables to measure the rheological properties of MR fluid and to expose it to a long-term loading simultaneously, without any manipulation of t...

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Bibliographic Details
Published in:Journal of physics. Conference series 2013-01, Vol.412 (1), p.12024-8
Main Authors: Roupec, J, Mazůrek, I, Strecker, Z, Klapka, M
Format: Article
Language:English
Subjects:
Dissipation
Durability
Evaluation
Magnetorheological fluids
Mathematical models
Physics
Product testing
Rheological properties
Rheometers
Temperature dependence
Viscosity
Yield strength
Yield stress
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Summary:The article describes results of durability test of a magnetorheological fluid (MRF), which was carried out in rheometer of own design. The rheometer design enables to measure the rheological properties of MR fluid and to expose it to a long-term loading simultaneously, without any manipulation of the measured sample. During the durability test a change of the two most important parameters of Bingham model describing the behavior of MR fluids can be followed – dynamic viscosity and yield stress. In this paper the yield stress and viscosity were evaluated depending on temperature in OFF-state. The results show a significant change of yield strength during durability test depending on temperature of loading. Dependence of yield stress on temperature was proved. The viscosity decreased by 36% from its initial value after the dissipation of 9÷20kJcm−3 from total 1.2 MJcm−3 and then has remained the same until the end of durability test. Viscosity was evaluated depending on temperature.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/412/1/012024