RHEOLOGICAL PROPERTIES OF MAGNETIZED BIDISPERSE MAGNETORHEOLOGICAL FLUIDS CONTAINING NEEDLE-LIKE PARTICLES

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Y. Iwamoto
Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Japan
T. Koroki
Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Japan
Y. Ido
Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Japan
H. Yamamoto
Department of Electrical and Control Systems Engineering, National Institute of Technology, Toyama College, Japan
H. Nishida
Department of Electrical and Control Systems Engineering, National Institute of Technology, Toyama College, Japan
Y. Fujii
KRI, Inc. Kyoto, Japan
T. Deguchi
KRI, Inc. Kyoto, Japan

Abstract

In the present study, a novel magnetic functional fluid, magnetized bidisperse magnetorheological fluids containing needle-like magnetic particles, was proposed to enhance magnetorheological effect. This is a fluid magnetized by a pulse-strong magnetic field of 8 T, before exposed to a weak external magnetic field for inducing the magnetorheological effect. The dynamic rheological measurements in the presence of a magnetic field using the magnetic field imposed-type rheometer (MCR302, MRD, Anton-paar) was carried out to investigate the effect of the initial magnetization on the rheological behavior. The results show that the storage modulus increases with the initial magnetization. Four element model fits the data well. The model shows that the magnetization increases the elastic elements of the fluid.

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Published: Nov 15, 2023

Article Details

Issue
Vol. 11 (2019)
Section
Oral Session E: Multifunctional, Composite and Magnetic Nanomaterials
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