Compressive and tensile stresses of magnetorheological fluids in squeeze mode

Mazlan, Saiful Amri; Ismail, Izwan; Zamzuri, Hairi; Fatah, Abdul Yasser Abd

doi:10.3233/jae-2011-1371

Cited by 25 publications

(17 citation statements)

References 15 publications

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“…Despite of the fact the length of each shear effective area were the same, the three coils which provide the magnetic flux density, have distinct configurations. Moreover, the magnitude of flux density in these simulation results were in a good range based on the available data supplied by Lord Corporation and other researchers (Mazlan et al 2009;El Wahed and McEwan 2011;Mazlan et al 2011;Wang et al 2011). From the values of average magnetic flux density obtained, the values of yield stress can be estimated by applying the approximate polynomial equation for MRF-132DG constructed by Nguyen et al (2008…”

Section: Resultssupporting

confidence: 63%

See 1 more Smart Citation

Simulation study of magnetorheological testing cell design by incorporating all basic operating modes

Mughni¹,

Mazlan²,

Zamzuri³

et al. 2014

Smart Structures and Systems

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Magnetorheological (MR) fluid is one of the field-responsive fluids that is of interest to many researchers due to its high yield stress value, which depends on the magnetic field strength. Similar to electrorheological (ER) fluid, the combination of working modes is one of the techniques to increase the performance of the fluids with limited focus on MR fluids. In this paper, a novel MR testing cell incorporated with valve, shear and squeeze operational modes is designed and constructed in order to investigate the behaviour of MR fluid in combined mode. The magnetic field distribution in the design concept was analyzed using finite element method in order to verify the effective areas of each mode have the acceptable range of flux density. The annular gap of valve and shear were fixed at 1 mm, while the squeeze gap between the parallel circular surfaces was varied up to 20 mm. Three different coil configurations, which were made up from 23 SWG copper wires were set up in the MR cell. The simulation results indicated that the magnetic field distributed in the squeeze gap was the highest among the other gaps with all coils were subjected to a constant applied current of 1 A. Moreover, the magnetic flux densities in all gaps were in a good range of magnitude based on the simulations that validated the proposed design concept. Hence, the 3D model of the MR testing cell was designed using Solidworks for manufacturing processes.

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Section: Resultssupporting

confidence: 63%

“…The typical properties of both MR fluids are summarized in Table 1. These commercial MR fluids were also used by other researchers in their studies (Goncalves and Carlson 2009;Mazlan et al 2011) while some researchers preferred to utilize a home-made MR fluids (Genc and Phule 2002; El Wahed and McEwan 2011).…”

Section: Mr Fluidmentioning

confidence: 99%

Simulation study of magnetorheological testing cell design by incorporating all basic operating modes

Mughni¹,

Mazlan²,

Zamzuri³

et al. 2014

Smart Structures and Systems

Self Cite

View full text Add to dashboard Cite

show abstract

“…This model has been effectively used in several applications and theoretical analyses, including (Gavin, 2001;Mazlan, 2008). When the yield stress (dependent on the magnetic field strength) is exceeded, the MR fluid begins to yield.…”

Section: Mrfluid Modelmentioning

confidence: 99%

CFD Model of a Magnetorheological Fluid in Squeeze Mode

Sapiński

Szczęch

2013

Acta Mechanica Et Automatica

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The study briefly outlines a CFD model of a magnetorheological (MR) fluid operated in squeeze mode with a constant interface area using the CFD (Computational Fluid Dynamics) approach. The underlying assumption is that the MR fluid is placed between two surfaces of which at least one can be subject to a prescribed displacement or a force input. The widely employed Bingham model, which fails to take into account the yield stress variations depending on the height of the gap, has been modified. Computation data obtained in the ANSYS CFX environment are compared with experimental results.

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“…Vieira et al (2003) studied the influences of magnetic field intensity, frequency, and amplitude on the characteristics of MRF squeeze flow. Mazlan et al (2007Mazlan et al ( , 2008aMazlan et al ( , 2008bMazlan et al ( , 2009Mazlan et al ( , 2011 further revealed the effects of squeeze velocity, squeeze gap, and current intensity. Zhang et al (2011) studied the MRF dynamic behaviors up to 50 Hz.…”

Section: Introductionmentioning

confidence: 96%

Dynamic characteristics of magnetorheological fluid squeeze flow considering wall slip and inertia

Zhang

Guo

et al. 2019

Journal of Intelligent Material Systems and Structures

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Magnetorheological fluid has been investigated intensively nowadays, and magnetorheological fluid shows large force capabilities in squeeze mode with wide application potential such as control valve, engine mounts, and impact dampers. In these applications, magnetorheological fluid is flowing in a dynamic environment due to the transient nature of inputs and system characteristics. Hence, this article undertakes a comprehensive study of magnetorheological fluid squeeze flow dynamics behaviors with wall slip, yield, and inertia. First, the dynamic model with the bi-viscous constitutive of magnetorheological fluid squeeze flow including wall slip and inertial force is presented. Then, the mathematical model is validated, matching magnetorheological fluid squeeze dynamic test results very well. Finally, the dynamics behavior and mechanism of magnetorheological fluid squeeze flow with inertia, yield, and wall slip are explored. Results show that (1) increasing yield stress and decreasing initial gap will increase the magnetorheological fluid vertical force greatly; (2) the wall slip affects the yield surface of magnetorheological fluids in the squeeze zone and affects the squeeze force; (3) the inertial force is increasing tremendously as the increased excitation frequency and yield stress and should be included with high-frequency excitation or yield stress.

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Compressive and tensile stresses of magnetorheological fluids in squeeze mode

Cited by 25 publications

References 15 publications

Simulation study of magnetorheological testing cell design by incorporating all basic operating modes

Simulation study of magnetorheological testing cell design by incorporating all basic operating modes

CFD Model of a Magnetorheological Fluid in Squeeze Mode

Dynamic characteristics of magnetorheological fluid squeeze flow considering wall slip and inertia

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