Computational Experimental Studies on Magnetoelastic Effects in a Metal Filled Elastomer

Russkikh, G. S.

doi:10.1016/j.proeng.2016.07.665

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…Regarding the pseudo-Villari effect itself in MR elastomers, Russkikh [ 38 ] studied the Villari effect (also called magneto-elastic effect) on magneto-rheological elastomers in compression mode. In the Russkikh study, the magnetic field variations induced by a compression strain were measured.…”

Section: Resultsmentioning

confidence: 99%

Energy conversion in magneto-rheological elastomers

Sebald

Nakano

Lallart

et al. 2017

Science and Technology of Advanced Materials

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Magneto-rheological (MR) elastomers contain micro-/nano-sized ferromagnetic particles dispersed in a soft elastomer matrix, and their rheological properties (storage and loss moduli) exhibit a significant dependence on the application of a magnetic field (namely MR effect). Conversely, it is reported in this work that this multiphysics coupling is associated with an inverse effect (i.e. the dependence of the magnetic properties on mechanical strain), denoted as the pseudo-Villari effect. MR elastomers based on soft and hard silicone rubber matrices and carbonyl iron particles were fabricated and characterized. The pseudo-Villari effect was experimentally quantified: a shear strain of 50 % induces magnetic induction field variations up to 10 mT on anisotropic MR elastomer samples, when placed in a 0.2 T applied field, which might theoretically lead to potential energy conversion density in the mJ cm-3 order of magnitude. In case of anisotropic MR elastomers, the absolute variation of stiffness as a function of applied magnetic field is rather independent of matrix properties. Similarly, the pseudo-Villari effect is found to be independent to the stiffness, thus broadening the adaptability of the materials to sensing and energy harvesting target applications. The potential of the pseudo-Villari effect for energy harvesting applications is finally briefly discussed.

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Section: Resultsmentioning

confidence: 99%

Energy conversion in magneto-rheological elastomers

Sebald

Nakano

Lallart

et al. 2017

Science and Technology of Advanced Materials

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“…The reverse magnetodeformational effect is also possible. Under the influence of mechanical load, filler particles are forced to rearrange, which changes their interactions and affects the magnetic properties of the material, in particular, the value of magnetic flux density at fixed external magnetic field [22,33,34].…”

Section: Introductionmentioning

confidence: 99%

Tunable layered composites based on magnetoactive elastomers and piezopolymer for sensors and energy harvesting devices

Makarova¹,

Alekhina²,

Isaev³

et al. 2020

J. Phys. D: Appl. Phys.

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The novel layered structures comprising piezoelectric polymer and magnetoactive elastomer (MAE) were developed and investigated. The influence of iron particles content in the elastomeric layer, its thickness and Young’s modulus of silicone on the multiferroic properties of the structures were analyzed. The investigation included the experimental and numerical characterization of the magnetoelectric effect. The giant values of bending deformations of MAEs in the external gradient magnetic field led to giant values of induced voltage (up to nearly 650 mV) in the composite. The displacement of ferromagnetic particles inside the elastomeric matrix under gradient magnetic field became the main basis for numerical modelling. The molecular dynamic method, ‘virtual springs’ method and Verlet algorithm were used to obtain the results of the numerical experiment. The energy transformation and magnetic field response in the novel composite allow it to be used in sensors and energy-harvesting devices.

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“…There is a great deal of literature on this subject in the 'classical' bulk soft magnetic materials, such as amorphous and ferrites [31][32][33][34]. However, although the magnetostriction in composites is well studied [7,35], there are few works about the Villari effect [36][37][38][39]. In a monolithic material, the magnetostriction and the Villari effect are closely linked because the Villari effect is due only to a magnetic effect; however, in magneto elastomers materials there is another contribution, due to the mechanical properties of the matrix [40,41].…”

Section: Introductionmentioning

confidence: 99%

Villari Effect at Low Strain in Magnetoactive Materials

Riesgo¹,

Elbaile

Carrizo

et al. 2020

Materials

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Magnetic composites of soft magnetic FeGa particles embedded in a silicone matrix have been synthesized. The Villari effect has been studied depending on the size and concentration of the particles and on the magnetic state of the composite. The results indicate a decrease in the Villari effect when the concentration of the magnetic particles increases. These results suggest a relationship between the Villari effect and the mechanical properties of the composites. The Young’s modulus of the composites has been obtained by microindentation and their values related to the intensity and slope of the Villari signals. The results are explained on the basis that the reduction in the cross section of the composite when submitted to stress is the main origin of the variation of the magnetic flux in the Villari effect in this kind of composite. It has also been obtained that the magnetic state of the composite plays an important role in the Villari signal. When the magnetization of the composite is greater, the magnetic flux across the composite is greater too and, so, the same reduction in the cross section originates a greater Villari signal.

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Computational Experimental Studies on Magnetoelastic Effects in a Metal Filled Elastomer

Cited by 7 publications

References 4 publications

Energy conversion in magneto-rheological elastomers

Energy conversion in magneto-rheological elastomers

Tunable layered composites based on magnetoactive elastomers and piezopolymer for sensors and energy harvesting devices

Villari Effect at Low Strain in Magnetoactive Materials

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