Compressible magnetorheological fluids

Fuchs, Alan; Rashid, Abu; Liu, Yanming; Kavlicoglu, Barkan M.; Sahin, Huseyin; Gordaninejad, Faramarz

doi:10.1002/app.31151

Cited by 14 publications

(20 citation statements)

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“…Later on, it is shown [35,36] that, in order to achieve more redispersibility in an MRF, the ferromagnetic particles should be coated with a high-temperature fluorinated polymer which could be implemented. Furthermore [35] provides the measurement of the cake hardness, which is carried out by a micromechanical instrument DMA-7e, PerkinElmer, Waltham, MA.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Nanoparticles as a Redispersing Additive in Magnetorheological Fluid

Portillo

Iglesias

2017

Journal of Nanomaterials

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Unwanted agglomeration of micro particles in magnetorheological fluid is an important problem for many technological applications. Furthermore, the stability of this kind of fluid is also studied as an important property in many research papers. Prior to use, a redispersion of agglomerated or aggregated (connected by solid phase) particles is often necessary. The objective of this study is to evaluate the dispersibility effect of magnetic nanoparticles as a carrier, while keeping the magnetorheological (MR) effect as high as possible. A simple device based on the estimation of the penetration force of a standard needle is presented. The needle moves across the sample vertically with a constant velocity and it is attached to a scale which registers the force displaced by the needle during the dynamic test. The effect with and without other additives was also studied. Transmission electron microscopy (TEM) and Scanning Electron Microscopy (SEM) reveal a protective behavior of nanoparticles around the micro particles. We conclude that addition of magnetic nanoparticles improves the dispersibility characteristic compared with common dispersing additives without affecting the MR effect.

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Section: Introductionmentioning

confidence: 99%

“…Furthermore [35] provides the measurement of the cake hardness, which is carried out by a micromechanical instrument DMA-7e, PerkinElmer, Waltham, MA.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Nanoparticles as a Redispersing Additive in Magnetorheological Fluid

Portillo

Iglesias

2017

Journal of Nanomaterials

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“…Several studies have been carried out in order to comprehend the influence of pressure on the properties of MRFs. In [5], a novel compressible MR fluid has been synthesized with additives that provide compressibility to the fluid. MR fluids are influenced by the presence of internal pressure [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Design of a novel magnetorheological damper with internal pressure control

Golinelli

Spaggiari

2015

Frattura Ed Integrità Strutturale

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In this work we designed and manufactured a novel magnetorheological (MR) fluid damper with internal\ud pressure control. Previous authors’ works showed that the yield stress\ud τ\ud B of MR fluids depends both on the magnetic field\ud intensity and on the working pressure. Since the increase of the magnetic field intensity is limited by considerations like\ud power consumption and magnetic saturation, an active pressure\ud control leads to a simple and efficient enhancement of the\ud performances of these systems. There are three main design\ud topics covered in this paper about the MR damper design.\ud First, the design of the magnetic circuit; second the desi\ud gn of the hydraulic system and third the development of an\ud innovative pressure control apparatus. The design approach\ud adopted is mainly analytical and provides the equations\ud needed for system design, taking into\ud account the desired force and stroke as\ud well as the maximum external dimensions

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“…In particular, magnetorheological (MR) suspensions [1][2][3][4][5][6][7][8][9][10][11][12], electrorheological (ER) fluids [13][14][15][16][17] under an applied electric field, magnetorheological elastomers [18][19][20][21][22], shape memory materials [23] and piezoelectric composites [24] are materials with controllable physical properties. The response function of the mechanical or electrical characteristics or combinations of these depends on the action of a field (magnetic or electric -according to whether the material has electrical or magnetic properties or combinations of these) [25].…”

Section: Introductionmentioning

confidence: 99%