Constitutive modeling of magnetorheological fluids: A review

Pei, Pei; Peng, Yongbo

doi:10.1016/j.jmmm.2022.169076

Cited by 43 publications

(18 citation statements)

References 154 publications

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“…Taking into account good magnetic properties and tunable structures a wide variety of magnetic particles, in particular sizes in the range from 0.1 to 20 μm, have been applied as MRFs compounds (de Vicente et al, 2011; Genc, 2022). Thus, the most preferred magnetic particle size is a range of 1–10 µm, while smaller particle sizes do not provide sufficient yield strength, and bigger particle sizes generate problems with sedimentation (Pei and Peng, 2022). According to the magnetic properties, the most common magnetic particles occur in ferromagnetism, while also superparamagnetic particles can be used (Osial et al, 2022).…”

Section: Formulationsmentioning

confidence: 99%

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Magnetorheological fluids: A concise review of composition, physicochemical properties, and models

Osial

Pręgowska

Warczak

et al. 2023

Journal of Intelligent Material Systems and Structures

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Magnetorheological fluids (MRFs) are classified as intelligent materials whose rheological and mechanical properties can be modified by interaction with an external magnetic field. These unique features allow for a controlled change of their viscosity, which is applied in technology to build adaptive devices and effectively suppress vibrations in various mechanical systems. In this paper, we overview and discuss our previous results regarding advances and physicochemical MRF properties in the context of broader literature. We concentrated on such properties as flow, yield strength, and viscoelastic behavior under shearing flows. We briefly discussed continuum and discrete MRFs modeling. Since the magnetic core is mainly based on iron or its compounds, depending on its chemical composition, morphology, stabilizing agents, and the liquid medium’s viscosity, its rheological and micromechanical properties can be moderated. To predict the behavior of such a fluid, it is necessary to propose and implement an appropriate model. Simple models like Bingham can consider the quasi-static and dynamic behavior of the MRFs, while discrete models are applied to the development and implementation of the MRF control algorithms. Thus, analytical and numerical simulation compromise the accuracy, quantity of considered phenomena, and computational cost.

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Section: Formulationsmentioning

confidence: 99%

“…Another important direction of research in the field of Magnetorheological Fluid is related to its modeling (Bingham, 1916; Pei and Peng, 2022). MRF modeling can be divided into two categories: continuum approach (i.e.…”

Section: The Mathematical Modeling Of Magnetorheological Fluidmentioning

confidence: 99%

Magnetorheological fluids: A concise review of composition, physicochemical properties, and models

Osial

Pręgowska

Warczak

et al. 2023

Journal of Intelligent Material Systems and Structures

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“…When the journal is stationary, the journal and shaft tile at the bottom of the approximate contact, in between the boundary lubrication and mixed lubrication, the lubrication effect is poor. Under the action of the applied magnetic field, magnetic particles by the magnetic torque along the magnetic field direction into a chain, the magnetic fluid viscosity increases, the structure of the strength significantly increased, the oil film thickness increases, the lubricant film bearing capacity increases, and the journal is propped up with the shaft tile to form a larger distance, in a fluid lubrication state, with better lubrication effect [21][22][23]. See Table 1 for the magnetic fluid lubrication bearing friction vice structure basic parameters table . Appl.…”

Section: Structural Model Of a Magneto-hydrodynamic Lubricated Bearin...mentioning

confidence: 99%

Structural Design and Lubrication Properties under Different Eccentricity of Magnetic Fluid Bearings

Wang

Pan

et al. 2022

Applied Sciences

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As a lubricant, the viscosity of the magnetic fluid changes with the external magnetic field, which improves the bearing capacity of the oil film and hence the lubrication effect, and has a promising application in bearings. Based on the Roelands viscosity theory, the Shliomis model is used to derive the viscous temperature, viscous pressure, and magnetic viscosity characteristics of magnetic fluids under the influence of an applied magnetic field, and further proposes a structural model of magnetic fluid lubricated bearings to investigate the pressure, temperature and magnetic intensity distribution of magnetic fluids under different eccentricity conditions. The results show that the viscosity of the magnetic fluid decreases exponentially with increasing temperature, rises linearly with increasing pressure, and increases and stabilizes with increasing magnetic induction strength. Because the minimum film thickness point is the dividing point between the convergent wedge and the dispersed wedge, the pressure distribution of the lubricant film separates high pressure from low pressure at the minimum film thickness, and the differential pressure increases with the increase in eccentricity. The temperature distribution of the high-temperature zone is mainly distributed in the middle of the film, and the minimum film thickness zone and the maximum temperature increases with the increase in eccentricity. The magnetic intensity distribution of the strong magnetic field is mainly concentrated in the minimum film thickness zone, and the magnetic induction intensity increases with the increase in eccentricity. The results of this study have certain research significance for solving the problem of the poor lubrication effect of bearing lubricant due to high temperature.

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“…In valve mode, the total damping force is the sum of the viscous ∆Fr and the magnetic field dependent force ∆Fmr. The damping force of the valve mode can be approximately expressed as [18]: (2) where η is the dynamic viscosity (Pa•s); Q is the flow rate (m 3 s); L, w and g are the length, width and clearance size respectively (m); τmr is the yield stress in response to the applied magnetic field (N/mm 2 ); f is an empirical factor that depends upon the specific value of ∆Fr and ∆Fmr, defined as: f=2, When ∆Fmr/ ∆Fr< 1; f=3, When ∆Fmr/ ∆Fr ~ 1. Eq.…”

Section: A Valve Modementioning

confidence: 99%

“…HEN the magnetic field is applied, iron particles in the MR fluid behave as dipoles and tend to align with the constant flux [1][2][3]. Based on this characteristic, magnetorheological fluids (MRF) are widely used in valve, clutch, brake, and damper systems [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Theoretical design and experimental study of magnetic circuit for magnetorheological (MR) damper of shear-valve mode

Liu¹,

Li²,

Sun³

et al. 2022

AEM

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According to the analysis of shear flow and pressure difference flow of MR fluids, the damping force of MR shear-valve damping force was analysed and calculated, and a magnetic circuit of Magnetorheological (MR) damper was designed. Based on the designed magnetic circuit, the degree of magnetic saturation and the dynamic characteristics of MR fluid damper, such as impedance, current, velocity and frequency were investigated. Magnetic induction testing of damping clearance was conducted, the test results show that when the coil current is 1.4A, the magnetic induction intensity reaches 0.55T.The bench test results show that when the piston speed is constant and the current is less than 1.36A, the variation range of damping force increases significantly. However, when the current is greater than 1.36A, the damping force tends to be stable and the coil reaches magnetic saturation, and energy indication characteristic of MR damper also show the same trend, which are consistent with the theoretical results. The results of this study can provide useful guidance for the magnetic circuit design of shear-valve MR fluid damper.

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Constitutive modeling of magnetorheological fluids: A review

Cited by 43 publications

References 154 publications

Magnetorheological fluids: A concise review of composition, physicochemical properties, and models

Magnetorheological fluids: A concise review of composition, physicochemical properties, and models

Structural Design and Lubrication Properties under Different Eccentricity of Magnetic Fluid Bearings

Theoretical design and experimental study of magnetic circuit for magnetorheological (MR) damper of shear-valve mode

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