MRE Properties under Shear and Squeeze Modes and Applications

Popp, Kristin M.; Kröger, Matthias; Li, Weihua; Zhang, Xian Zhou; Kosasih, P.B.

doi:10.1177/1045389x09355666

Cited by 94 publications

(52 citation statements)

References 17 publications

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“…However, when the strain amplitude is out of the LVE region, the storage modulus decreases 23% with the increment of the strain from 0.05% to 0.1%. The rigidity reduction is 63% when the strain increases from 0.05% to 1.0%, which is in accordance with the reports by Popp et al (2010) in the nonlinear region.…”

Section: Modulus (supporting

confidence: 92%

Characterization of the linear viscoelastic region of magnetorheological elastomers

Agirre-Olabide

Berasategui

Elejabarrieta

et al. 2014

Journal of Intelligent Material Systems and Structures

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The linear viscoelastic behaviour of magnetorheological elastomers is analysed in this work according to their formulation and working conditions. This study comprised both the synthesis of different magnetorheological elastomers and the strain and frequency sweep characterization under different magnetic fields and temperatures. The characterization was performed by a Physica MCR 501 rheometer from Anton Paar, equipped with a magnetorheologic cell 70/1T MRD. In the synthesis with a given elastomeric matrix, samples with different magnetic particle content are studied with two types of curing conditions: under the action of a magnetic field (anisotropic magnetorheological elastomers) and without a magnetic field (isotropic magnetorheological elastomers). The working conditions are excitation frequency, temperature and the applied external magnetic field. In this work, a new procedure to determine the linear viscoelastic behaviour is proposed; the loss factor is analysed in addition to analysing the storage modulus to determine the linear viscoelastic region of each sample. The results show that high temperatures and magnetorheological elastomers with higher volume fraction of magnetic particles restrict the linear viscoelastic behaviour of magnetorheological elastomers.

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Section: Modulus (supporting

confidence: 92%

Characterization of the linear viscoelastic region of magnetorheological elastomers

Agirre-Olabide

Berasategui

Elejabarrieta

et al. 2014

Journal of Intelligent Material Systems and Structures

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“…The most striking phenomenon observed in Figure is the huge increase of the both moduli in magnetic field. It has been shown in several works that the magnetic response of MRE is strain‐dependent. Thus, below we focus on the effect of strain on the field dependence of G ′ and G ″.…”

Section: Resultsmentioning

confidence: 99%

Viscoelastic Properties of Magnetorheological Elastomers for Damping Applications

Молчанов

Степанов

Vasiliev

et al. 2014

Macro Materials & Eng

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Magnetorheological elastomers (MRE) have been synthesized on the basis of a silicon compound and a mixture of carbonyl iron particles of sizes 3–5 and 40–80 μm. Their viscoelastic properties have been studied by dynamic shear oscillations of various amplitudes on a stress controlled rheometer. The magnetic response of the obtained materials has been examined in a magnetic field applied perpendicular to the shear plane. It has been shown that under applied magnetic field both the storage G′ and loss G″ moduli became strain‐dependent. The values of G′ and G″ decrease with strain, while their ratio (the loss factor), G″/G′, growths with strain. The higher magnetic field is the more pronounced the strain dependence is. At small strain (up to 1%) MRE demonstrate a giant (more than 10 times) increase of the moduli. Some features of hysteretic behavior of MRE under simultaneously applied magnetic field and external mechanical force have been elucidated. Temperature has a negligible effect on viscoelastic properties and stability of the developed MRE. A damper on the basis of MRE has been designed and its properties have been examined.

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“…In recent years, a new class of materials in magnetorheological (MR) family, magnetorheological elastomer (MRE), has attracted a great deal of attentions from researchers around the world (Popp et al, 2010). The functionality of MREs is based on magnetic interaction of particles when subjected to an external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Finite element design and analysis of adaptive base isolator utilizing laminated multiple magnetorheological elastomer layers

2015

Journal of Intelligent Material Systems and Structures

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Available magnetorheological elastomer devices normally consist one to two layers of small-size magnetorheological elastomer materials. To be used in large-scale structures, magnetorheological elastomer devices with multiple larger magnetorheological elastomer materials are expected. This article addresses the critical issue in designing a large-scale device with multiple layers of low magnetic conductive magnetorheological elastomer materials, that is, magnetic circuit design. The primary target in magnetic circuit design for magnetorheological elastomer devices is to provide sufficient and uniform magnetic field to all magnetorheological elastomer layers in the device. In this article, finite element investigations are conducted. An innovative magnetic circuit design is proposed for magnetorheological elastomer base isolator with multi-layer of magnetorheological elastomer materials. In the design, laminated magnetorheological elastomer and steel structure is adopted as part of the magnetic core together with two steel blocks. Cylindrical steel tube is used as the yoke of the magnetic circuit. Two plates are placed on the top and bottom of the device to form enclosed magnetic path in the device. Finite element results showed that such innovative magnetic design is able to provide sufficient and uniform magnetic field to all magnetorheological elastomer layers, that is, 25 magnetorheological elastomer layers with thickness of 1 mm and diameter of 120 mm in this case. Finally, the influence of lateral deformation of the magnetorheological elastomer base isolator on the magnetic field is investigated. It is found that the magnetic field in magnetorheological elastomer materials deteriorates when the deformation of the device increases.

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MRE Properties under Shear and Squeeze Modes and Applications

Cited by 94 publications

References 17 publications

Characterization of the linear viscoelastic region of magnetorheological elastomers

Characterization of the linear viscoelastic region of magnetorheological elastomers

Viscoelastic Properties of Magnetorheological Elastomers for Damping Applications

Finite element design and analysis of adaptive base isolator utilizing laminated multiple magnetorheological elastomer layers

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