Electrorheological fluid characterization via a vertical oscillation rheometer

Kim, J.W; Cho, M.S; Choi, Hyoung Jin; Kim, S.G; Kim, C.A

doi:10.1016/s0142-9418(01)00020-4

Cited by 12 publications

(4 citation statements)

References 26 publications

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“…However, the curve shape of the PANI-based ER fluid for the damper Electrorheological Semi-active Damper was not well developed. It is assumed that the cause of this behavior was from a mismatch of the response time between the PANI-based ER fluid and the applied electric field [26]. Some measurements of this time constant remain to be tested by future experiments.…”

Section: Resultsmentioning

confidence: 99%

Electrorheological Semi-Active Damper: Polyaniline Based ER System

Kim

Cho

Choi

et al. 2002

Journal of Intelligent Material Systems and Structures

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Among various materials suitable for an electrorheological (ER) fluid, polyaniline and its many derivatives based upon modification of oxidation state, dopant and polymerization conditions are of technological interest for their adaptation into ER fluids. This is because they have better thermal stability and smaller density than other potential ER materials. Furthermore, polyaniline is easy to polymerize by oxidation polymerization at relatively low temperature and can be doped from a conducting emeraldine hydrochloride form to an insulating state using simple protonic acids. In this study, we adapted the polyaniline based ER fluids for semi-active cylindrical flow-mode type ER damper. A cylindrical flow-mode type ER damper was chosen in this study because it has similar geometrical configuration to the conventional damper normally used for passenger vehicle. The damping forces measured using a semi-active ER damper with polyaniline based ER fluids were found to be controlled by tuning an applied electric field for different piston velocity.

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Section: Resultsmentioning

confidence: 99%

Electrorheological Semi-Active Damper: Polyaniline Based ER System

Kim

Cho

Choi

et al. 2002

Journal of Intelligent Material Systems and Structures

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“…The storage modulus G′, the loss modulus G″ and the tangent of loss angle d can be obtained [44,45]. Here ρ is the density of ERF (1.6 kg m −3 ).…”

Section: Methodsmentioning

confidence: 99%

Performance evaluation of electrorheological fluid using acoustic method

Wang¹,

Gong²,

Qin³

et al. 2016

Smart Mater. Struct.

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This paper presents a simple method to evaluate the performance of electrorheological fluid (ERF) with acoustic parameters. The key parameters, such as the storage modulus and the loss modulus are obtained by ultrasonic shear wave reflectometry. By comparing and analyzing the value of the ratio of these two shear wave parameters, it could be easily and quickly to evaluate the performance of ERF. Four kinds of electrode surface morphology are chosen to vary the performance of ERF in this paper. The experimental results show that the optimum ERF system, for example the electrode surface morphology and DC electric field etc, are easily to be found by this method. Furthermore, the influence of leaky current is discussed also.

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“…To compare the morphology of PANI/Na + -MMT nanocomposites with pure Na + -MMT particles, SEM images (Hitach S-4300, condition of 3k magnification and 10 kV) were examined. Rheological properties of the prepared ER fluid were investigated by vertical oscillation rheometer (VOR) which was specially designed for dynamic mechanical analysis of the ER fluid system under high electric field strengths [6].…”

Section: Methodsmentioning

confidence: 99%

“…The fabricated nanocomposite particles were then dispersed in insulating silicone oil to prepare an ER fluid. Dynamic mechanical properties of the ER fluid were examined using a vertical oscillation rheometer [6].…”

Section: Introductionmentioning

confidence: 99%