000001958 001__ 1958
000001958 005__ 20141118153448.0
000001958 04107 $$acze
000001958 046__ $$k2011-05-09
000001958 100__ $$aRoupec, J.
000001958 24500 $$aCHANGING THE BEHAVIOR OF MR FLUIDS DURING LONG TERM OPERATION 

000001958 24630 $$n17.$$pEngineering Mechanics 2011
000001958 260__ $$bInstitute of Thermomechanics AS CR, v.v.i., Brno
000001958 506__ $$arestricted
000001958 520__ $$2eng$$aThe 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.

000001958 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000001958 653__ $$aMagnetorheological fluid, MRF, durability test, yield stress, dynamic viscosity, shear rate.

000001958 7112_ $$aEngineering Mechanics 2011$$cSvratka (CZ)$$d2011-05-09 / 2011-05-12$$gEM2011
000001958 720__ $$aRoupec, J.$$iStrecker, Z.$$iMazůrek, I.
000001958 8560_ $$ffischerc@itam.cas.cz
000001958 8564_ $$s855349$$uhttp://invenio.itam.cas.cz/record/1958/files/p120.pdf$$y
             Original version of the author's contribution as presented on book, page 519.
            
000001958 962__ $$r1835
000001958 980__ $$aPAPER