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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Experimental characterization and viscoelastic modeling of isotropic and anisotropic magnetorheological elastomers
TL;DR: In this article, the authors presented experimental research and numerical modeling of dynamic properties of magnetorheological elastomers (MREs) using double-lap shear test under harmonic loading in the displacement control mode.
Journal ArticleDOI
Mesoscopic magnetomechanical hysteresis in a magnetorheological elastomer.
TL;DR: It is shown that for multidomain ferromagnetic particles embedded in an elastomer matrix, as for paramagnetic ones in the same environment, pair clusters may form or break by a hysteresis scenario, but the magnetization saturation brings in important features to this effect.
Journal ArticleDOI
The effect of pre-structure process on magnetorheological elastomer performance
TL;DR: In this paper, the effect of the pre-structure process on the magnetorheological elastomer performance was investigated. But, the authors focused on the effect on the microstructure.
Journal ArticleDOI
Dynamic mechanical behavior of magnetorheological nanocomposites filled with carbon nanotubes
TL;DR: In this paper, the dynamic mechanical responses of magnetorheological elastomer composites to applied magnetic fields are investigated through dynamic mechanical analysis and it is found that a small amount of carbon nanotubes can effectively improve the mechanical performance of conventional MR elastomers.
Journal ArticleDOI
Improved tunable range of the field-induced storage modulus by using flower-like particles as the active phase of magnetorheological elastomers.
Yu Tong,Xufeng Dong,Min Qi +2 more
TL;DR: A model mechanism is established to analyze the potential benefits of using flower-like particles as the active phase compared with the benefits of use conventional spherical particles, and the tunable range of the field-induced storage modulus of MREs is improved upon using the flower- like particles.
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.