Modeling of MR Fluids and Devices

Ulicny, John C.; Klingenberg, Daniel J.; Kittipoomwong, David; Golden, Mark A.; Smith, Anthony L.; Namuduri, Chandra; Sun, Zongxuan; Sivakumar, Srinivasan M.; Buravalla, Vidyashankar; Srinivasa, Arun R.

doi:10.1063/1.2971978

Cited by 3 publications

(4 citation statements)

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“…Foister reported that MR suspensions composed of mixtures of magnetizable particles of two different diameters (1.25 and 7.9µm) can provide a substantial increase in the field-induced yield stress without an increase in the viscosity of the mixture in the absence of a magnetic field [2]. Similar observations were reported by Weiss et al [3] and Ulicny et al [4]. Simulations of bidisperse suspensions employed by Kittipoomwong et al in three dimensions predict that the yield stress for suspensions of mixtures of small and large spheres is larger than that of monodisperse suspensions at the same volume fraction [5].…”

Section: Introductionsupporting

confidence: 66%

Investigation of Bimodal Particles Based Magnetorheological Elastomers

Zhang

2008

AMR

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This paper presents the study of rheological and mechanical properties of MR elastomers fabricated using small and large particle. Analysis indicated that MR elastomers fabricated with bimodal particles at a specific particle ratio ingredient show enhanced MR effect compared with those fabricated with monoparticles. MR elastomer samples were fabricated by using small and large particles with sizes of 5m and 50m respectively. Their rheological and mechanical properties were characterized with a MR rheometer. Experimental results agree well with the analysis.

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Section: Introductionsupporting

confidence: 66%

Investigation of Bimodal Particles Based Magnetorheological Elastomers

Zhang

2008

AMR

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“…The present work aimed at performing a thorough investigation of the effects of the η-7 Be interaction in the p + 6 Li → η + 7 Be reaction near threshold. The work was partly motivated by the recent revival of interest in this reaction by the COSY-GEM collaboration [9] after the first measurement in 1993. This work also comes as a sequel to our various earlier studies on η meson production in light nuclei.…”

Section: Discussionmentioning

confidence: 99%

“…Part of the emphasis of this work was on obtaining the right form factors for 7 Li (and 7 Be) and the interactions of the mesons with the nuclei in the final states were neglected. The interest in the p + 6 Li → η + 7 Be reaction revived once again by the recent proposal of studying this reaction at COSY, Jülich, at an incident energy of 673 MeV [9].…”

Section: Eta Meson Interactions With Light Nucleimentioning

confidence: 99%

Eta meson rescattering effects in the reaction near threshold

2009

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The p + 6 Li → η + 7 Be reaction has been investigated with an emphasis on the η meson and 7 Be interaction in the final state. Considering the 6 Li and 7 Be nuclei to be α-d and α-3 He clusters respectively, the reaction is modelled to proceed via the p + d[α] → 3 He[α] + η reaction with the α remaining a spectator. The η meson interacts with 7 Be via multiple scatterings on the 3 He and α clusters inside 7 Be. The individual η-3 He and η-α scatterings are evaluated using few body equations for the η-3N and η-4N systems with a coupled channel η-N interaction as an input. Calculations including four low-lying states of 7 Be lead to a double hump structure in the total cross section corresponding to the L = 1 (J = (1/2) − , (3/2) − ) and L = 3 (J = (5/2) − , (7/2) − ) angular momentum states. The humps arise due to the off-shell rescattering of the η meson on the 7 Be nucleus in the final state.

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“…After their initial discovery, Magnetorheological fluids and devices attract more and more researchers' attention. So far, the most MRFs are based on carbonyl iron (CI) particles owing to their high saturation magnetization [8] . But the different density between CI particles and base oil causes serious sedimentation problem of MRF.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Lubricant on Tribological Properties of Carbonyl Iron-Based Magnetorheological Fluids

Hu¹,

Yan²,

Wang³

et al. 2011

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Magnetorheological fluid (MRF) is a new kind of smart material, it is very necessary for us to study its tribological properties because it will be widely used in engineering application. In this paper, the tribological behavior of Carbonyl Iron-based magnetorheological fluid (MRF) was investigated on a four-ball tribological tester, the influence of lubricant on friction coefficient and wear scar diameter was discussed, the morphology of the wear steel surfaces lubricated with MRF were observed by a scanning electron microscope. The results show that the addition of MoS2can significantly improve the tribological properties of clay-based MRF. However, the friction and wear properties of silica-based MRF become bad after the addition of MoS2. The morphology of worn surface lubricated with the MRF added MoS2is similar to that without additive, but the groove of wear marks lubricated with clay-based MRF is more shallower and the area of the worn surface is smaller in the condition of adding MoS2.

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Modeling of MR Fluids and Devices

Cited by 3 publications

References 0 publications

Investigation of Bimodal Particles Based Magnetorheological Elastomers

Investigation of Bimodal Particles Based Magnetorheological Elastomers

Eta meson rescattering effects in the reaction near threshold

The Effect of Lubricant on Tribological Properties of Carbonyl Iron-Based Magnetorheological Fluids

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