Publication detail
The Behavior of the MR Fluid During Durability Test
ROUPEC, J. MAZŮREK, I. STRECKER, Z. KLAPKA, M.
Czech title
Chování MR kapaliny během trvanlivostní zkoušky
English title
The Behavior of the MR Fluid During Durability Test
Type
journal article - other
Language
en
Original abstract
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 9-20kJ.cm-3 from total 1.2 MJ.cm-3 and then has remained the same until the end of durability test. Viscosity was evaluated depending on temperature.
Czech abstract
Článek popisuje výsledky trvanlivostní zkoušky magnetoreologické kapaliny, která byla provedena na reometr vlastní konstrukce. Konstrukce reometru umožňuje měřit reologické vlastnosti MR kapaliny a zároveň ji vystavovat dlouhodobému zatížení bez nutnosti manipulovat s měřeným vzorkem. Během trvanlivostní zkoušky byly sledována změna dvou nejdůležitějších parametrů Binghamského modelu, jenž popisují chování MR kapalin – dynamická viskozita a mez toku. V tomto článku je vyhodnocena mez toku a viskozita v neaktivovaném stavu v závislosti na teplotě. Výsledky ukazují výraznou změnu počátečního napětí během trvanlivostního testu závisející na teplotě zatěžování. Byla prokázána závislost meze toku na teplotě. Viskozita poklesla o 36% její počáteční hodnoty po disipaci 9-20kJ.cm-3 z celkových 1,2MJ.cm-3 a poté již zůstala stejná až do konce trvanlivostní zkoušky. Viskozita byla vyhodnocena v závislosti na teplotě.
English abstract
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 9-20kJ.cm-3 from total 1.2 MJ.cm-3 and then has remained the same until the end of durability test. Viscosity was evaluated depending on temperature.
Keywords in Czech
MR kapalina, MR tlumič, magnetoreologický, Binghamský model, viskozita, mez toku, trvanlivostní zkouška, vysoký smykový spád
Keywords in English
MR fluid, MR damper, magnetorheological, Bingham model, viscosity, yield stress, durability test, high shear rates
RIV year
2012
Released
27.08.2012
Publisher
IOP Publishing
ISSN
1742-6588
Volume
412
Number
1
Pages from–to
1–8
Pages count
8
BIBTEX
@article{BUT93430,
author="Jakub {Roupec} and Ivan {Mazůrek} and Zbyněk {Strecker} and Milan {Klapka},
title="The Behavior of the MR Fluid During Durability Test",
year="2012",
volume="412",
number="1",
month="August",
pages="1--8",
publisher="IOP Publishing",
issn="1742-6588"
}