Journal ArticleDOI
Modeling of particle interactions in magnetorheological elastomers
TLDR
In this paper, the interaction between two particles made of an isotropic linearly polarizable magnetic material and embedded in an elastomer matrix is studied, and an interpolation formula for the resistance of the elastic matrix to the field-induced particle displacements is proposed.Abstract:
The interaction between two particles made of an isotropic linearly polarizable magnetic material and embedded in an elastomer matrix is studied. In this case, when an external field is imposed, the magnetic attraction of the particles, contrary to point dipoles, is almost wraparound. The exact solution of the magnetic problem in the linear polarization case, although existing, is not practical; to circumvent its use, an interpolation formula is proposed. One more interpolation expression is developed for the resistance of the elastic matrix to the field-induced particle displacements. Minimization of the total energy of the pair reveals its configurational bistability in a certain field range. One of the possible equilibrium states corresponds to the particles dwelling at a distance, the other—to their collapse in a tight dimer. This mesoscopic bistability causes magnetomechanical hysteresis which has important implications for the macroscopic behavior of magnetorheological elastomers.read more
Citations
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A numerical study on magnetostrictive phenomena in magnetorheological elastomers
TL;DR: In this paper, the authors present an investigation on magnetostrictive phenomena in magnetorheological elastomers by using a continuum approach, constitutive as well as geometric properties on the microscale are taken into account in order to predict the effective behavior of these composites by means of a computational homogenization.
Journal ArticleDOI
Polymer architecture of magnetic gels: a review
TL;DR: This review article provides an introduction to ferrogels, i.e. polymeric gels with embedded magnetic particles, and provides an overview of synthesis strategies and experimental techniques for the characterization of these materials.
Journal ArticleDOI
Magnetorheology: a review.
Jose R. Morillas,Juan de Vicente +1 more
TL;DR: This review paper revisits the most recent progress in the field of magnetic Soft Matter emphasizing the rheological properties of these fascinating materials and new formulations and flow kinematics are discussed.
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Microscale modeling and simulation of magnetorheological elastomers at finite strains: A study on the influence of mechanical preloads
TL;DR: In this article, a numerical study on the deformation dependent behavior of magnetorheological elastomers with structured and unstructured particle distributions is presented, where finite element simulations are performed to calculate the effective magnetization and macroscopic actuation stresses for different specimens with realistic microstructures and varying mechanical preloads.
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.
References
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Journal ArticleDOI
Magnetorheological fluids: a review
TL;DR: Magnetorheological (MR) materials are a kind of smart materials whose mechanical properties can be altered in a controlled fashion by an external magnetic field as discussed by the authors, and they traditionally include fluids, elastomers and foams.
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Conduction through a random suspension of spheres
TL;DR: In this paper, the conduction of heat through a stationary random suspension of spheres is studied for a volume fraction of the spheres (c) which is small, and the work of Maxwell (1873) is extended to calculate the flux of heat exactly to order c 2 by using the method of Batchelor (1972), which reduces the problem to a consideration of interactions between pairs of spheres while avoiding the usual convergence difficulties.
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Model of magnetorheological elastomers
TL;DR: 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%.
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Studies on the steady-shear behavior of electrorheological suspensions
TL;DR: In this article, the structures of nonaqueous suspensions subjected to electrical fields and continuous shear are described, and models for the yield stress and continuous-shear response of these electrorheological (ER) suspensions are developed.
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Magnetorheology: materials and application
TL;DR: In this article, preparation methods and magnetorheological properties of various magnetic composites with soft magnetic particles and polymers are reviewed, and some industrial applications, such as a MR dampers and a MR polishing, are briefly summarized.