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
Variable stiffness structures utilizing fluidic flexible matrix composites
Ying Shan,Michael Philen,Amir Lotfi,Suyi Li,Charles E. Bakis,Christopher D. Rahn,Kon-Well Wang +6 more
TL;DR: In this paper, a 3D analytical model is developed to characterize the axial stiffness behavior of a single F 2MC tube, and the test results show good agreement with the model predictions.
Journal ArticleDOI
Magneto-sensitive Elastomers in a Homogeneous Magnetic Field: A Regular Rectangular Lattice Model
Dmytro Ivaneyko,Dmytro Ivaneyko,Vladimir Toshchevikov,Vladimir Toshchevikov,Marina Saphiannikova,Gert Heinrich,Gert Heinrich +6 more
TL;DR: In this article, a theory of the magneto-sensitive elastomers is developed in the framework of a linear elasticity approach using a regular rectangular lattice model, different spatial distributions of magnetic particles within a polymer matrix are considered: isotropic, chain-like and plane-like.
Journal ArticleDOI
Novel Soft Actuator Using Magnetorheological Elastomer
TL;DR: In this paper, a soft actuator using a magnetorheological elastomer is described and the magnetic circuit when a current is applied is described, and its operating principle is explained.
Journal ArticleDOI
Magnetorheological elastomers with high variability of their mechanical properties
TL;DR: In this article, the viscoelastic properties of magnetorheological elastomer (MRE) composites containing different concentrations of iron particles in a silicone matrix and the change of these properties in a magnetic field of variable strength were investigated.
Journal ArticleDOI
Large-strain behaviour of Magneto-Rheological Elastomers tested under uniaxial compression and tension, and pure shear deformations
TL;DR: In this article, the large-strain behavior of magneto-rheological elastomers (MREs) is characterised experimentally under uniaxial compression, uníaxial tension and pure shear deformation, in the absence and in the presence of magnetic fields.
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.