Publication detail

Changing the behavior of MR fluids during long term operation

ROUPEC, J. MAZŮREK, I. STRECKER, Z.

Original Title

Changing the behavior of MR fluids during long term operation

English Title

Changing the behavior of MR fluids during long term operation

Type

conference paper

Language

en

Original Abstract

The article describes results of durability test of a magnetorheological fluid (MRF) which was carried out in a custom design rheometer. The rheometer design allows measurement of the rheological properties of MR fluid and its exposure to a long-term loading simultaneously, without any manipulation of the measured sample. Owing to this, changes of the two most important parameters describing the behavior of MR fluids - dynamic viscosity and yield stress - could be followed during the durability test. The dependence of yield stress and dynamic viscosity on temperature and magnetization current was evaluated. The results show a significant change of the yield strength (500%) during the durability test. Independence of the yield stress on the temperature was conclusively proven. The viscosity decreased by 35% from its initial value after dissipation of 9000kJ out of total 119000kJ and then remained the same until the end of the durability test. Viscosity dependence on temperature was evaluated.

English abstract

The article describes results of durability test of a magnetorheological fluid (MRF) which was carried out in a custom design rheometer. The rheometer design allows measurement of the rheological properties of MR fluid and its exposure to a long-term loading simultaneously, without any manipulation of the measured sample. Owing to this, changes of the two most important parameters describing the behavior of MR fluids - dynamic viscosity and yield stress - could be followed during the durability test. The dependence of yield stress and dynamic viscosity on temperature and magnetization current was evaluated. The results show a significant change of the yield strength (500%) during the durability test. Independence of the yield stress on the temperature was conclusively proven. The viscosity decreased by 35% from its initial value after dissipation of 9000kJ out of total 119000kJ and then remained the same until the end of the durability test. Viscosity dependence on temperature was evaluated.

Keywords

Magnetorheological fluid, MRF, durability test, yield stress, dynamic viscosity, shear rate

RIV year

2011

Released

09.05.2011

Publisher

IT ASCR

Location

Brno

ISBN

978-80-87012-33-8

Book

Engineering Mechanics 2011

Edition

17th international Conference

Edition number

1

Pages from

519

Pages to

522

Pages count

4

BibTex


@inproceedings{BUT72626,
  author="Jakub {Roupec} and Ivan {Mazůrek} and Zbyněk {Strecker}",
  title="Changing the behavior of MR fluids during long term operation",
  annote="The article describes results of durability test of a magnetorheological fluid (MRF) which was carried out in a custom design rheometer. The rheometer design allows measurement of the rheological properties of MR fluid and its exposure to a long-term loading simultaneously, without any manipulation of the measured sample. Owing to this, changes of the two most important parameters describing the behavior of MR fluids - dynamic viscosity and yield stress - could be followed during the durability test. The dependence of yield stress and dynamic viscosity on temperature and magnetization current was evaluated. The results show a significant change of the yield strength (500%) during the durability test. Independence of the yield stress on the temperature was conclusively proven. The viscosity decreased by 35% from its initial value after dissipation of 9000kJ out of total 119000kJ and then remained the same until the end of the durability test. Viscosity dependence on temperature was evaluated.",
  address="IT ASCR",
  booktitle="Engineering Mechanics 2011",
  chapter="72626",
  edition="17th international Conference",
  howpublished="print",
  institution="IT ASCR",
  year="2011",
  month="may",
  pages="519--522",
  publisher="IT ASCR",
  type="conference paper"
}