Characterization of magnetorheological brake utilizing synthesized and commercial fluids

Acharya, Subash; Saini, Radhe Shyam Tak; Singh, Surya Bhanu; Kumar, Hemantha

doi:10.1016/j.matpr.2020.03.061

Cited by 17 publications

(10 citation statements)

References 6 publications

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“…Magnetorheological (MR) fluids are categorized as smart materials, and they are one of the most functional fluids changing rheological properties under the application of the external magnetic field (Acharya et al 2020). Such field-responsive fluids can reverse their viscosity forming a chain-like structure (Ashour et al 1996, Muhhamed et al 2006, while without magnetic field MR fluid behaves like Newtonian (Bica 2006).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the well-dispersed magnetorheological oil-based suspension with superparamagnetic nanoparticles using modified split Hopkinson pressure bar

et al. 2021

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Magnetorheological (MR) fluids are classified as smart materials whose viscoplastic characteristics change under the magnetic field. They are widely applied for dynamic energy dissipation due to their rapid thickening under the external magnetic field. In this work, the core–shell suspension of superparamagnetic iron oxide-based nanoparticles was synthesized and dispersed in silicone oil. Much effort has been made to prepare suspension meeting requirements of MR fluid. The experimental squeezing flow response was studied using a modified split Hopkinson pressure bar (SHPB) with various shear rates. Tests with modified SHPB show that MR fluid rapidly responds to the compression thickening and forming chain-like structures. MR fluid dissipates the energy generated during compression stress tests. This study presents a simple and cost-effective synthesis way suitable for MR fluid formation for its dynamic energy dissipation application.

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Section: Introductionmentioning

confidence: 99%

Investigation of the well-dispersed magnetorheological oil-based suspension with superparamagnetic nanoparticles using modified split Hopkinson pressure bar

et al. 2021

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“…One of the main criteria of the flow or yield behaviour occurring is the time and (due to the method of measurement) the method followed to control the test, i.e. the controlled shear rate (CSR) or the controlled shear stress (CSS) [27,28].…”

Section: Methods Of Determination Of the Limit Stressesmentioning

confidence: 99%

Experiments and Analysis of the Limit Stresses of a Magnetorheological Fluid

Horak

Stępień

Sapiński

2022

Acta Mechanica Et Automatica

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This paper presents the results of a rheological test of a commercial magnetorheological (MR) fluid (MRF-132DG). The research includes the problem of measuring and interpreting limit stresses under conditions close to the magnetic saturation of the fluid. Four different limit stresses were determined, two related to the yield point and two related to the flow point. Methods for determining limit stresses, especially due to excitation conditions, were also analysed. The aim of this study is to determine the effect of selected parameters on the values of limit stresses of the selected MR fluid. An additional objective is to highlight the problems of defining and interpreting individual limit stresses in MR fluids, particularly in the context of selecting the values of these stresses for the purpose of modeling systems with MR fluids.

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“…The MR brake performance is measured in terms field induced and off-state braking torques, torque ratio, hysteresis time, torque tracking control characteristics, speed reduction, etc. (Acharya et al, 2020; Dai et al, 2019; Li and Du, 2003; Nguyen et al, 2014; Rossa et al, 2014; Sukhwani and Hirani, 2008a, 2008b). In the current study, the field induced and off-state braking torques, speed reduction and torque ratio of MR brake were investigated.…”

Section: Performance Evaluation Of Mr Brake Utilizing Mrf 132dg Fluidmentioning

confidence: 99%

Selection of optimal composition of MR fluid for a brake designed using MOGA optimization coupled with magnetic FEA analysis

Acharya

Saini

Sundaram

et al. 2020

Journal of Intelligent Material Systems and Structures

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The design of Magnetorheological (MR) brake and the composition of MR fluid (MRF) used in it have a significant effect on its performance and hence an effort has been made in this study to determine the optimal dimensions of MR brake and composition of MRF suitable for the brake application. Initially, optimum parameters of MR brake were computed considering the properties of commercially available MRF 132DG fluid using multi-objective genetic algorithm (MOGA) optimization. This was performed in MATLAB software coupled with magnetostatic analyses in ANSYS APDL software. The braking torque of designed MR brake utilizing MRF 132DG fluid was experimentally determined and validated with analytical ones. Further, selection of optimal composition of MRF was done considering In-house MRF samples composed of different combinations of particle mass fractions, mean particle diameters and base oil viscosities. A design of experiments (DOE) technique was employed and braking torque corresponding to the synthesized MRF samples at different speeds and current supplied were measured along with the variation of shaft speed during braking process. Grounded on the experimental results, using MOGA optimization technique, MRF composed of smaller sized iron particles (2.91 microns) with mass fraction of 80.95% and lower viscosity base oil (50 cSt) was selected as optimal composition of MRF for use in MR brake. Maximization of field induced braking torque and minimization of off-state torque were chosen as the objective functions for both the optimal design of MR brake and selection of optimal composition of MRF. Finally, the sedimentation stability of MRFs were investigated.

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Characterization of magnetorheological brake utilizing synthesized and commercial fluids

Cited by 17 publications

References 6 publications

Investigation of the well-dispersed magnetorheological oil-based suspension with superparamagnetic nanoparticles using modified split Hopkinson pressure bar

Investigation of the well-dispersed magnetorheological oil-based suspension with superparamagnetic nanoparticles using modified split Hopkinson pressure bar

Experiments and Analysis of the Limit Stresses of a Magnetorheological Fluid

Selection of optimal composition of MR fluid for a brake designed using MOGA optimization coupled with magnetic FEA analysis

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