Simulation and experimental studies on the behaviour of a magnetorheological damper under impact loading

Pokaad, Alif Zulfakar bin; Hudha, Khisbullah; Nasir, Mohd Zakaria Bin Mohamad; Ubaidillah, N.A.

doi:10.1504/ijstructe.2011.039422

Cited by 30 publications

(20 citation statements)

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“…Spring assembly MRE-based stopper. [223,[226][227][228] Figure 24 shows a compositebased device that can be applied in automotive bumpers as an impact absorber. These devices can be implemented in bumper systems, optical applications, vehicle engine mounts, suspension systems, rotating machinery vibration isolation, sensitive equipment mounts, and manufacturing automation systems that require vibration isolation to improve production performance.…”

Section: Impact Elementmentioning

confidence: 99%

Recent Progress on Magnetorheological Solids: Materials, Fabrication, Testing, and Applications

et al. 2014

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Magnetorheological (MR) materials are classified as smart materials due to their responsiveness to external magnetic stimuli. Intensive research on MR materials has led to broad applications in several potential fields. A solid carrier matrix state called MR elastomer with its exceptional magnetic responsive feature is obtained by merging magnetizable particles within an elastomeric polymer. This integration results in outstanding characteristics on the rheological performances. Special prominence is given to the understanding of the base materials and fabrication as well as the functional behavior through various characterization methods. Broad applications of MREs are also explored to provide a profound market picture and to motivate researchers to develop novel technology.

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Section: Impact Elementmentioning

confidence: 99%

Recent Progress on Magnetorheological Solids: Materials, Fabrication, Testing, and Applications

et al. 2014

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“…The fluid consists of micron-sized magnetizable particles in the hydrocarbon fluid. The permeability of the MR fluid is acquired from the fluid manufacturer [6].…”

Section: Methodsmentioning

confidence: 99%

“…Technologies utilizing magnetorheological fluids (MRFs) have been widely developing, and it has continued to grow over the past few decades. In general, the main applications of MRFs are for semi-active damping element in a vibration system, driving actuators, as well as the sensory system [1][2][3][4][5][6][7], seats of commercial vehicle [8,9] high-speed trains suspension systems in [10,11], large washing machine [12,13], advanced artificial limb system [14,15], aircraft landing gear [16,17], automotive suspension systems [18][19][20][21], helicopter rotor system [22] complex mechanical systems [23], and so on. Existing research on the application of ferrofluid (not MRF) in the loudspeaker damping system is more focused on the main [2].…”

Section: Introductionmentioning

confidence: 99%

Preliminary experimental evaluation of a novel loudspeaker featuring magnetorheological fluid surround absorber

Purnomo

Ubaidillah

Imaduddin

et al. 2020

IJEECS

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A novel design of magnetorheological fluids (MRF) based surround device in a loudspeaker system was studied in this article. The main objective of this research is to design a new surround device of the loudspeaker that can be easily controlled its damping. Therefore, it was predicted that the audio pressure level on the loudspeaker could be easily manipulated at a different sound source by applying a certain magnetic field. This function could not be reached using one conventional speaker system. Firstly, a set of an electromagnetic device containing MRF was designed to replace the conventional rubber surround. The magnetic circuit was then evaluated using the finite element method magnetics to study the flux distribution in the MRF area. The current was varied from 0.25 to 0.75 A by an interval of 0.25 A. The magnetic flux resulted from the simulation was then logged and used as the based value for predicting the change of shear yield stress. The base properties of the shear yield stress of the MRF against the magnetic flux was obtained from previous experimental result. Therefore, it was hopefully the prediction could be closed to the real system. Based on the simulation result, the shear yield stress varied from 43 to 49 Mpa or about 15 % increment. A simple experimental work was carried out. By applying particular direct current into the coil, the sound quality generated by the loudspeaker shows different values. Based on the preliminary experiment, the level of decibel decreased about 3 dB as the application of magnetic fields. The idea has been proven in this preliminary experimental evaluation.

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“…Magnetorheological (MR) materials have been attracting researcher intention in last six decades. This material comprises of non-magnetic viscoelastic materials such as fluids, greases, plasticine, and elastomer, filled with micron-sized soft magnetic materials [1][2][3]. The intrinsic properties of this smart material are responsive to the occurrence of magnetic fields and reversible to the initial state rapidly in the absence of magnetic fields [4].…”

Section: Introductionmentioning

confidence: 99%

Improvement of magnetorheological greases with superparamagnetic nanoparticles

Mohamad

Mazlan

Choi

et al. 2018

MATEC Web of Conferences

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Magnetorheological greases (MRGs) is a viscoelastic suspension comprised of carbonyl iron (CI) particles in a thixotropic medium; grease, which able to solve the instability problem that occurs in oil medium like MRFs. The primary purpose introduction of superparamagnetic nanoparticles γ-Fe2O3 in MRGs suspension is to investigate the effect of additives toward MRGs characteristics. Two types of MRGs suspension with and without nanoparticles γ-Fe2O3 were prepared in the same CI particles concentration for comparison purpose. It was observed that MRGs with incorporated of 1 wt% nanoparticles γ-Fe2O3 showed an increment regarding magnetic properties. In the meantime, the off-state viscosity of MRGs containing nanoparticles γ-Fe2O3 was reduced, however, increased during on-state condition. This fact indicates that the interspaces between CI particles are filled by the nanoparticles γ-Fe2O3. Therefore, the introduction of the nanoparticles indirectly improved the MRGs properties.

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Simulation and experimental studies on the behaviour of a magnetorheological damper under impact loading

Cited by 30 publications

References 0 publications

Recent Progress on Magnetorheological Solids: Materials, Fabrication, Testing, and Applications

Recent Progress on Magnetorheological Solids: Materials, Fabrication, Testing, and Applications

Preliminary experimental evaluation of a novel loudspeaker featuring magnetorheological fluid surround absorber

Improvement of magnetorheological greases with superparamagnetic nanoparticles

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