Journal ArticleDOI
Model of magnetorheological elastomers
TLDR
In this paper, the authors used finite element analysis to show that the shear modulus of typical elastomers is about 50% of the zero-field modulus at saturation and the optimum particle volume fraction for the largest fractional change in modulus is predicted to be 27%.Abstract:
Magnetorheological elastomers consist of natural or synthetic rubber filled with micron-sized magnetizable particles. During curing of the elastomer, an applied magnetic field aligns the particles into chains. The shear modulus of the resulting cured material is sensitive to magnetic fields of several kOe magnitude. Such sensitivity to magnetic field makes these materials attractive for applications in automotive mounting components. At large fields (magnetic induction B>1 T), the Fe particles are completely magnetized or saturated. Calculations using finite element analysis show that for typical elastomers the increase in shear modulus due to interparticle magnetic forces at saturation is about 50% of the zero-field modulus. The optimum particle volume fraction for the largest fractional change in modulus at saturation is predicted to be 27%. Calculations of the zero-field shear modulus perpendicular to the chain axis indicate that it does not exceed the modulus of a filled elastomer with randomly disper...read more
Citations
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Novel highly elastic magnetic materials for dampers and seals: Part I. Preparation and characterization of the elastic materials
Sergey S. Abramchuk,Elena Yu. Kramarenko,Elena Yu. Kramarenko,Gennady V. Stepanov,L.V. Nikitin,Genovéva Filipcsei,Alexei R. Khokhlov,Alexei R. Khokhlov,Miklós Zrínyi +8 more
TL;DR: In this article, the authors study fundamental principles governing the preparation of magnetic elastomers as well as their structure and elastic properties, and propose a method for determining the behavior of these materials depending on the composition, external conditions, and the synthesis processes.
Journal ArticleDOI
Effect of carbon black on the mechanical performances of magnetorheological elastomers
Lin Chen,Xiuqing Gong,Weihua Li +2 more
TL;DR: In this paper, several magnetorheological elastomer (MRE) samples, with different weight percentages of carbon black, were fabricated under a constant magnetic field, and their microstructures were observed by using an environmental scanning electron microscope (SEM).
The elastic and damping properties of magnetorheological elastomers
TL;DR: In this paper, a dynamic mechanical analyzer (DMA) was used in resonance for both isotropic and aligned MREs where the filler content varied from 0 to 30 vol.%.
Journal ArticleDOI
Dynamic compression testing of a tunable spring element consisting of a magnetorheological elastomer
TL;DR: In this paper, the magnetic properties of aligned and isotropic magnetorheological elastomer composites were tested in cyclic compression passively and with increasing magnetic flux density.
Journal ArticleDOI
Performance of MRE-based Vibration Absorbers:
TL;DR: In this article, magnetorheological elastomers (MREs) are used as field-dependent springs within three vibration absorber configurations, and to determine their vibration absorption characteristics.
References
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Theory of Filler Reinforcement
TL;DR: In this article, the authors generalized the model for ellipsoidal (including plate-and rod-like) filler particles and extended it to the computation of various properties in terms of the properties of the matrix and of the fillers.
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A model of the behaviour of magnetorheological materials
TL;DR: In this paper, a quasi-static, one-dimensional model is developed that examines the mechanical and magnetic properties of magnetorheological materials, and the model attempts to account for magnetic nonlinearities and saturation by establishing a mechanism by which magnetic flux density is distributed within the composite material.
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Encyclopedia of Applied Physics
TL;DR: The 23-volume "Encyclopedia of Applied Physics" seeks to demonstrate the synergy between physics and technological applications as discussed by the authors, and provides a broad overview of the main aspects of physics and their applications.
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Commercial magneto-rheological fluid devices
TL;DR: Controllable magnetorheological (MR) fluid devices have reached the stage where they are in commercial production as discussed by the authors, and such devices are finding application in a variety of real world situations ranging...
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The Magnetoviscoelastic Response of Elastomer Composites Consisting of Ferrous Particles Embedded in a Polymer Matrix
TL;DR: In this paper, a quasi-static dipole model is presented to examine the magnetoviscoelastic effect of these elastomer composites and the model is semi-empirical in that it may be fit to experimental data over a broad range of applied magnetic fields.