The rheological properties of magnetic field excited magnetic powders sheared between two parallel plates

Chen, Kaikai; Tian, Yu; Shan, Lei; Zhang, Xiangjun; Meng, Yonggang

doi:10.1088/0964-1726/22/11/115036

Cited by 12 publications

(15 citation statements)

References 29 publications

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“…In addition, the ratio reaches saturation in the post-yield region for the reason that the shear stress and normal stress are both nearly constant in that region (shown in Figure 9A). On the other hand, larger ratio happens at smaller magnetic field strength, which is similar with the results of MR fluid (Chen et al, 2013). This is because the normal stress and shear stress increase at different levels with the increase of magnetic fields.…”

Section: Influence Of Magnetic Field On the Normal Stress Behaviorsupporting

confidence: 85%

“…Moreover, the saturations of normal stress and shear stress in the post-yield region arise from the magnetic saturations in MRG. On the other hand, since the MR effect could be simply expressed as the ratio of field-on shear stress to field-off shear stress (Chen et al, 2013)…”

Section: Influence Of Magnetic Field On the Normal Stress Behaviormentioning

confidence: 99%

“…According to the research of Li and Chen, the shear stress is mainly influenced by two factors: magnetic force and friction force. The shear stress could be predicted as follows (Li and Zhang, 2008;Chen et al, 2013):…”

Section: Influence Of Magnetic Field On the Normal Stress Behaviormentioning

confidence: 99%

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Magneto-Induced Normal Stress of Magnetorheological Gel Under Quasi-Statically Monotonic and Periodically Cyclic Loading

Mao

Wang

et al. 2021

Front. Mater.

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Magnetorheological (MR) gel, an analog of MR fluid, is a novel kind of magnetic-responsive material. In this article, the influence of quasi-statically monotonic loading and periodically cyclic loading on the normal stress behavior of MR gel (MRG) is systemically investigated. Firstly, carbonyl iron powder (CIP) and soft polymer were adopted for the fabrication of MRG. Then, the variations of normal stress with shear strain were tested under different excited magnetic fields, shear rates, CIP contents, and shear strain amplitudes. It was found that the normal stress behavior of MRG exhibits three prominent stages: a sudden rise at the beginning, followed by a rapid decrease, and then a final steady-state value. The experiments also indicated that the excited magnetic field, compared with other influencing factors, has the most critical effect on the normal stress behavior of MRG. The corresponding mechanisms of various phenomena were methodically discussed. Furthermore, the ratio of shear stress to normal stress was proposed to better comprehend the mechanism of the evolution of internal microstructures of MRG and MR effects from a novel perspective. The results implied that the ratio has a close relation to the excited magnetic field and CIP content of MRG. The increase of normal stress is helpful for the fabrication of MRG with a high-efficiency MR effect.

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Section: Influence Of Magnetic Field On the Normal Stress Behaviorsupporting

confidence: 85%

Section: Influence Of Magnetic Field On the Normal Stress Behaviormentioning

confidence: 99%

See 1 more Smart Citation

Magneto-Induced Normal Stress of Magnetorheological Gel Under Quasi-Statically Monotonic and Periodically Cyclic Loading

Mao

Wang

et al. 2021

Front. Mater.

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“…Due to variation in the magnetic flux, the shear stress is lesser at higher gaps. If the magnetic flux can be applied uniformly throughout the parallel plate gap, the rheological properties would be higher at the higher gap [23][24][25].…”

Section: Influence Of Particle Concentrationmentioning

confidence: 99%

Evaluation of optimal parameters of MR fluids for damper application using particle swarm and response surface optimisation

Gurubasavaraju

Kumar

Mahalingam

2017

J Braz. Soc. Mech. Sci. Eng.

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The controllable rheological properties of MR fluid exhibit viscoelastic properties within pre-yield, which are essential for the characterization of MR dampers for the isolation of vibration. In the present work, using particle swarm optimisation (PSO), it is identified that the proportion of MR fluid constituents, fluid gap and current are the parameters which influence majorly on the rheological properties and damping effect of MR damper. Initially, rheological properties of the prepared MR fluid samples are determined using rotational plate-plate type rheometer with the magnetorheological device cell attachment by keeping three levels of gap between the parallel plates. Three different proportions of MR fluid are prepared based on the volume fraction of carbonyl iron particle, i.e., 25, 30 and 35% in the silicone carrier fluid along with 1% of lithium-based grease as stabiliser. The objective function of this optimisation problem is to maximise the shear stress and damping force of the MR damper. The design of experiment (DOE) is employed to obtain the various combinations of parameters and their respective responses. The interaction of the regression model obtained from the DOE is used in PSO to evaluate the optimal parameters. The results indicated that the MR fluid with the particle concentration of 31% is the optimal proportion for MR damper application.

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“…Among these, electric and magnetic stimuli-responsive systems have attracted considerable attention because of their easy controllability and industrial needs. Suspensions containing electro-responsive and magneto-responsive particles are often referred to as electrorheological (ER) or magnetorheological (MR) fluids [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], respectively, in which the ER fluid generally consists OPEN ACCESS of dielectric polarizable particles dispersed in an insulating medium, whereas its magnetic analogue, the MR fluid, is typically based on magnetizable particles dispersed in a carrier medium. When exposed to an electric field, the suspended ER particles become electrically polarized, resulting in the formation of a fibrous structure of originally uniformly distributed particles.…”

Section: Introductionmentioning

confidence: 99%

Stimuli-Responsive Polymers and Colloids under Electric and Magnetic Fields

Zhang¹,

Choi

2014

Polymers

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Electrorheological (ER) and magnetorheological (MR) suspensions undergo a reverse phase transition from a liquid-like to solid-like state in response to an external electric or magnetic field, respectively. This paper briefly reviews various types of electro-or magneto-responsive materials from either polymeric or inorganic and hybrid composite materials. The fabrication strategies for ER/MR candidates and their ER/MR characteristics (particularly for ER fluids) are also included.

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The rheological properties of magnetic field excited magnetic powders sheared between two parallel plates

Cited by 12 publications

References 29 publications

Magneto-Induced Normal Stress of Magnetorheological Gel Under Quasi-Statically Monotonic and Periodically Cyclic Loading

Magneto-Induced Normal Stress of Magnetorheological Gel Under Quasi-Statically Monotonic and Periodically Cyclic Loading

Evaluation of optimal parameters of MR fluids for damper application using particle swarm and response surface optimisation

Stimuli-Responsive Polymers and Colloids under Electric and Magnetic Fields

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