Understanding the super-strong behavior of magnetorheological fluid in simultaneous squeeze-shear with the Péclet number

Bigué, Jean-Philippe Lucking; Charron, François; Plante, Jean‐Sébastien

doi:10.1177/1045389x15577657

Cited by 11 publications

(5 citation statements)

References 25 publications

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“…The strengthening effect has been theoretically explained using the local field theory by Zhang et al [12], and more recently interpreted in terms of the Péclet number [13] In a recent study, Ruiz-López et al [14] developed a micromechanical model to explain the rheological properties of MR fluids under slow compression. They found that the yield compressive stress depends linearly on the particle volume fraction and on the magnetic field strength squared: 𝜏 𝑌𝐶 ~𝜙𝐻 2 .…”

Section: Introductionmentioning

confidence: 99%

Simulations of model magnetorheological fluids in squeeze flow mode

Ruiz-López

Wang

Hidalgo‐Álvarez

et al. 2017

Journal of Rheology

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A particle-level simulation methodology is proposed to study the squeeze flow behavior of model magnetorheological fluids. The simulation algorithm takes into account Brownian motion and local field corrections to magnetic interactions of the particles. Simulation results obtained from using different initial configurations, including one single-particle-width chain per simulation box, random or lattice arrangements of preassembled single-particle-width chains as well as randomly dispersed particle suspensions, are compared with experimental data and predictions of a recently developed microscopic model. The assumption of single-particle-width chain structures in the systems has been shown to generate normal stresses larger than those found in experiments and the micromechanical model. However, much better agreement between the simulation and experimental results have been reached when using random initial configurations in the simulations.

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Section: Introductionmentioning

confidence: 99%

Simulations of model magnetorheological fluids in squeeze flow mode

Ruiz-López

Wang

Hidalgo‐Álvarez

et al. 2017

Journal of Rheology

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“…The producer datasheet reports a yield stress around 50 kPa when the magnetic field is above 300 KA/m. Although it is not specified in the producer TDS we can find some information in literature work [8][9][10][11][12][13][14][15][16][17] about the average dimension of the spherical MR particles, which is around 20µm, with a density around 2950-3150 kg/m 3 . The settling and the agglomeration of the particles is prevented thanks to proprietary surfactants and additives.…”

Section: Methodsmentioning

confidence: 99%

“…The changes in the magnetic field are due to the fluid gap modification and due to the different phase volume of the system, as expected for hard particles. A similar approach was used in other works about the so called squeeze-strengthen effect [8][9][10][11][12][13][14][15][16][17] in which many researchers demonstrates that there is a strong enhancement of the apparent yield stress of the fluid when there is a combination of shear and compression. This behaviour is due to the formation of larger particles columns, as stated by [11,18] thanks to the compressive state resulting in a higher yield stress when the magnetic field is applied.…”

Section: Introductionmentioning

confidence: 96%

Characterization of commercial magnetorheological fluids at high shear rate: influence of the gap

Golinelli¹,

Spaggiari²

2018

Smart Mater. Struct.

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This paper reports the experimental tests on the behaviour of a commercial MR fluid at high shear rates and the effect of the gap. Three gaps were considered at multiple magnetic fields and shear rates. From an extended set of almost two hundred experimental flow curves, a set of parameters for the apparent viscosity are retrieved by using the Ostwald de Waele model for non-Newtonian fluids. It is possible to simplify the parameter correlation by making the following considerations: the consistency of the model depends only on the magnetic field, the flow index depends on the fluid type and the gap shows an important effect only at null or very low magnetic fields. This lead to a simple and useful model, especially in the design phase of a MR based product. During the off state, with no applied field, it is possible to use a standard viscous model. During the active state, with high magnetic field, a strong non-Newtonian nature becomes prevalent over the viscous one even at very high shear rate; the magnetic field dominates the apparent viscosity change, while the gap does not play any relevant role on the system behaviour. This simple assumption allows the designer to dimension the gap only considering the non-active state, as in standard viscous systems, and taking into account only the magnetic effect in the active state, where the gap does not change the proposed fluid model.

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“…This relationship is not directly proportional due to the MRF having a complex behavior, according to Ref. [14]. Parameter x 1 and x 2 are the displacements of the slave and master pistons, respectively.…”

Section: Description Of the Analytical Model 251 Two-degree-of-freedo...mentioning

confidence: 99%

Design and Experimental Assessment of a Vibration Control System Driven by Low Inertia Hydrostatic Magnetorheological Actuators for Heavy Equipment

Mallette,

Gauthier,

Hemmatian

et al. 2023

Actuators

Self Cite

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Active suspension systems for automotive vehicles were developed in the past using hydrostatic, electric, magnetic and magnetorheological (MR) technologies to control road vibrations and vehicle dynamics and thus improve ride comfort and vehicle performance. However, no such systems were developed for heavy equipment, trucks and off-highway vehicles. For instance, agricultural tractors are still equipped with minimal suspension systems causing discomfort and health problems to drivers. The high suspension loads due to the massive weight of these vehicles are a challenge since high forces are needed to achieve efficient active suspension control. This paper presents an experimentally validated feasibility study of a hydrostatic, MR clutch-driven system of actuators. The scope of this paper is to evaluate the preliminary performance of the actuator for future vibration control. The hydraulic system allows the actuators to be remotely located from the wheels or cabin of the heavy vehicle and conveniently placed on the vehicle’s suspended frame. The design includes two MR clutches driven in an antagonistic configuration to push and pull on the end effector. Experiments on a laboratory prototype show that the low-inertia characteristics of the clutches allow a high blocked-output force bandwidth of 20 Hz with peak output forces exceeding 15 kN.

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Understanding the super-strong behavior of magnetorheological fluid in simultaneous squeeze-shear with the Péclet number

Cited by 11 publications

References 25 publications

Simulations of model magnetorheological fluids in squeeze flow mode

Simulations of model magnetorheological fluids in squeeze flow mode

Characterization of commercial magnetorheological fluids at high shear rate: influence of the gap

Design and Experimental Assessment of a Vibration Control System Driven by Low Inertia Hydrostatic Magnetorheological Actuators for Heavy Equipment

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