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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Journal ArticleDOI
Development of a semi-active dynamic vibration absorber for longitudinal vibration of propulsion shaft system based on magnetorheological elastomer
TL;DR: In this paper, a semi-active dynamic vibration absorber (SDVA) was designed based on the magnetic-induced variable stiffness characteristic of the MRE's magnetic properties, which can be used as variable-stiffness components in the design of a SDVA.
Journal ArticleDOI
A nonlinear magnetorheological elastomer model based on fractional viscoelasticity, magnetic dipole interactions, and adaptive smooth Coulomb friction
TL;DR: In this article, a nonlinear MRE model consisting of three parts, a fractional viscoelasticity model, magnetic dipole model, and an adaptive smooth Coulomb friction model, is developed.
Journal ArticleDOI
A new model for the cantilever MEMS actuator in magnetorheological elastomer cored sandwich form considering the fringing field and Casimir effects
TL;DR: In this paper, the pull-in instability of a magnetorheological elastomer (MRE) sandwich cantilever MEMS actuator with conductive skins is investigated and the governing equations and the related boundary conditions are obtained through variational principle based on the Euler-Bernoulli beam theory.
Journal ArticleDOI
Development of a field dependent Prandtl-Ishlinskii model for magnetorheological elastomers
TL;DR: In this paper, a stop operator-based classical PI model was proposed to predict nonlinear hysteresis properties of MREs as functions of the strain amplitude, excitation frequency and magnetic flux density.
Journal ArticleDOI
Dynamic damping property of magnetorheological elastomer
Jianfeng Li,Xinglong Gong +1 more
TL;DR: In this article, the dynamic damping of magnetorheological elastomer (MRE) was studied and analyzed and the influences of different test conditions including test strain amplitude, test frequency and test magnetic field were deeply studied.
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.