Testing and steady state modeling of a linear MR damper under sinusoidal loading

Li, Weihua; Yao, Gang; Chen, G; Yeo, Song Huat; Yap, Fook Fah

doi:10.1088/0964-1726/9/1/310

Cited by 165 publications

(117 citation statements)

References 12 publications

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“…Till now, there is still limited work on the modeling of complex behavior of MR elastomer. Much of the efforts are built on the previous research on the modeling of MR fluids [130][131]. Figure 33.…”

Section: Rheological Modeling Of Mr Elastomer Materialsmentioning

confidence: 99%

A state-of-the-art review on magnetorheological elastomer devices

Li¹,

Li²,

Li³

et al. 2014

Smart Mater. Struct.

514

385

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During the last few decades, magnetorheological (MR) elastomers have attracted a significant amount of attention for their enormous potential in engineering applications. Because they are a solid counterpart to MR fluids, MR elastomers exhibit a unique field-dependent material property when exposed to a magnetic field, and they overcome major issues faced in magnetorheological fluids, e.g. the deposition of iron particles, sealing problems and environmental contamination. Such advantages offer great potential for designing intelligent devices to be used in various engineering fields, especially in fields that involve vibration reduction and isolation. This paper presents a state of the art review on the recent progress of MR elastomer technology, with special emphasis on the research and development of MR elastomer devices and their applications. To keep the integrity of the knowledge, this review includes a brief introduction of MR elastomer materials and follows with a discussion of critical issues involved in designing magnetorheological elastomer devices, i.e. operation modes, coil placements and principle fundamentals. A comprehensive review has been presented on the research and development of MR elastomer devices, including vibration absorbers, vibration isolators, base isolators, sensing devices, and so on. A summary of the research on the modeling mechanical behavior for both the material and the devices is presented. Finally, the challenges and the potential facing magnetorheological elastomer technology are discussed, and suggestions have been made based on the authors' knowledge and experience. Abstract:During last decades, magnetorheological (MR) elastomer has attracted significant amount of attention for its enormous potentials in engineering applications. Being a solid counterpart of MR fluids, MR elastomers exhibit unique field-dependent material property when being exposed to magnetic field, in meanwhile overcoming major issues faced in magnetorheological fluids, e.g. deposition of iron particles, sealing problem and environmental contamination. Such advantages offer great potentials for designing intelligent devices to be used in various engineering fields, especially for vibration reduction and isolation. This paper presents a state-of-the-art review on the recent progress of MR elastomer technology, with special emphasis on research and development of MR elastomer devices and their applications. To keep the integrity of the knowledge, the review includes a brief introduction of the MR elastomer materials and follows by discussion of critical issues in designing magnetorheological elastomer devices, i.e. operation modes, coil placements and principle fundamentals. A comprehensive review has been presented research and development of MR elastomer devices, including vibration absorbers, vibration isolators, base isolators, sensing devices and so on. Summary of research on modeling mechanical behavior for both material and devices are presented. Finally, challenges and potentials facing ...

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Section: Rheological Modeling Of Mr Elastomer Materialsmentioning

confidence: 99%

A state-of-the-art review on magnetorheological elastomer devices

Li¹,

Li²,

Li³

et al. 2014

Smart Mater. Struct.

514

385

View full text Add to dashboard Cite

show abstract

“…According to the simple bound-rubber model shown in Fig.1(b), w is defined as the power coefficient to convert the thickness of bound-rubber to effective thickness of particle surface, the effective volume of a particle is 4 3 π(R + wt) 3 . Different matrixes have different w, which can be obtained by experiments.…”

Section: A Influence On Zero-field Modulus Of Mresmentioning

confidence: 99%

“…[2]. Because of their quick response, good reversibility and controllable performance, MR materials have been widely used in various fields such as vehicle construction, building, and vibration control [1][2][3][4][5][6][7]. MREs are composed of micrometer size magnetizable particles and an elastomer matrix.…”

Section: Introductionmentioning

confidence: 99%

Existence of Bound-Rubber in Magnetorheological Elastomers and Its Influence on Material Properties

Zhang

Gong

Pei-qiang

et al. 2007

Chinese Journal of Chemical Physics

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In efforts to develop a new fabrication method for improvement of the MREs' performance, the boundrubber phenomenon was observed in MREs. Further experiments indicate the existance of bound-rubber and it influences the MRE performance as well as the particle size. Both theoretical analysis and experimental results indicated that MRE performance can be improved by enhancing the ratio of particle radius to boundrubber thickness.

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“…Lord Corporation has produced commercial MR brakes for many applications; for example, Model RD-1005, produced by Lord Corporation, has a diameter of 38 mm and stroke length of 208.3 mm, and its maximum force is 451 N at 0.2 m/s with 1.5 A current input. However, it has an off-state force of about 52 N when no magnetic field is applied [5][6][7]. This means that this brake has a maximum force to off-state friction force ratio of 8.7.…”

Section: Introductionmentioning

confidence: 99%

A linear magnetorheological brake with multipole outer coil structure for high on-state and low off-state force outputs

Demiray¹,

Bas²,

Kılıç³

et al. 2017

Turk J Elec Eng & Comp Sci

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A wide range of braking forces, from near zero to high values, is required in specific applications such as forces in haptic devices or steering stability in motorcycles. Classical piston cylinder type magnetorheological (MR) brakes are not suitable for these applications due to their high off-state forces. In this paper, a new linear type MR brake employing shear mode braking principle with a multipole outer coil structure is presented for high on-state and low off-state force outputs. To implement this device, an analytical model of the brake is derived by using magnetic circuit analysis to determine braking force. Magnetic finite element models are developed and coupled with an optimization algorithm to determine the optimal set of parameters of the brake design. A prototype is manufactured and tested experimentally to characterize the device's force response, transient response, hysteresis, force tracking, and damping performance. The proposed brake achieved a maximum braking force of 480 N and a low off-state force of 6 N with infinite stroke. The results show that the ratio of maximum force to off-state force for our device is about 80, even though it is a maximum of 32 for the best linear brakes in the literature.

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Testing and steady state modeling of a linear MR damper under sinusoidal loading

Cited by 165 publications

References 12 publications

A state-of-the-art review on magnetorheological elastomer devices

A state-of-the-art review on magnetorheological elastomer devices

Existence of Bound-Rubber in Magnetorheological Elastomers and Its Influence on Material Properties

A linear magnetorheological brake with multipole outer coil structure for high on-state and low off-state force outputs

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