Surface relief of magnetoactive elastomeric films in a homogeneous magnetic field: molecular dynamics simulations

Sánchez, Pedro A.; Minina, Elena; Kantorovich, Sofia S.; Kramarenko, Elena Yu.

doi:10.1039/c8sm01850b

Cited by 39 publications

(34 citation statements)

References 63 publications

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“…Recently, some researchers [19][20][21][22] have found that the surface microstructures of MRE will change under the influence of the magnetic field, which provides a new idea for exploring the mechanism of magnetroncontrolled friction of MRE. In previous studies [23], we found that the surface roughness of MRE would change under the action of the magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on surface roughness of magnetorheological elastomer for controllable friction

et al. 2019

Friction

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Magnetorheological elastomer (MRE) is a type of smart material of which mechanical and electrical properties can be reversibly controlled by the magnetic field. In this study, the influence of the magnetic field on the surface roughness of MRE was studied by the microscopic modeling method, and the influence of controllable characteristics of the MRE surface on its friction properties was analyzed by the macroscopic experimental method. First, on the basis of existing studies, an improved mesoscopic model based on magnetomechanical coupling analysis was proposed. The initial surface morphology of MRE was characterized by the W-M fractal function, and the change process of the surface microstructures of MRE, induced by the magnetic interaction between particles, was studied. Then, after analyzing the simulation results, it is found that with the increase in the magnetic field and decrease in the modulus of rubber matrix, the surface of MRE changes more significantly, and the best particle volume fraction is within 7.5%-9%. Furthermore, through experimental observation, it is found that the height of the convex peak on the surface of MRE decreases significantly with the action of the magnetic field, resulting in a reduction in the surface roughness. Consistent with the simulation results, a particle volume fraction of 10% corresponds to a maximum change of 14%. Finally, the macroscopic friction experiment results show that the friction coefficients of MREs with different particle volume fractions all decrease with the decrease in surface roughness under the magnetic field. When the particle volume fraction is 10%, the friction coefficient can decrease by 24.7% under a magnetic field of 400 mT, which is consistent with the trend of surface roughness changes. This shows that the change in surface morphology with the effect of the magnetic field is an important factor in the control of MRE friction properties by magnetic field.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on surface roughness of magnetorheological elastomer for controllable friction

et al. 2019

Friction

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“…A similar simple approach was introduced very recently to model the magnetoelastic response of thin film elastomeric coatings. 55 Each spring i corresponds to a simple harmonic potential:…”

Section: Model Interactionsmentioning

confidence: 99%

“…52 Numerous models use elastic springs to represent the mechanical constraints of the polymer matrix on the magnetic particles, either based on some fixed reference frame 33,35 or on an interconnected network of particles and springs. 45,47,48,50,[53][54][55] Explicit bead-spring monomer representations of the polymers, as the ones used in some models of magnetic gels, [56][57][58][59] still seem too expensive to provide useful insights on MEs. Another important simplification required by these models is the treatment of the magnetic properties of the embedded particles.…”

Section: Introductionmentioning

confidence: 99%

Modeling the magnetostriction effect in elastomers with magnetically soft and hard particles

et al. 2019

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“…The change of MAE elastic modules has been defined as the magnetorheological effect (MRE) [14][15][16][17][18]. Due to all their abovementioned properties, MAE are now classified as smart materials [19,20].…”

Section: Introductionmentioning

confidence: 99%

Magnetorheological effect in elastomers containing uniaxial ferromagnetic particles

Kalita¹,

Иванова²,

Loktev³

2020

Condens. Matter Phys.

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The description of the collective magnetorheological effect induced by magnetic field in magnetoactive elastomers is proposed. The condition of consistency is used between magnetic and mechanic momenta of forces exerted on magnetically uniaxial ferromagnetic particles in elastomer at their magnetization. The study shows that even in the case of small concentration of particles, the value of magnetically-induced shear can be anomalously large, reaching up to tens of percent. The deformation of magnetoactive elastomer can evolve critically, as a second-order phase transition, if magnetic field is aligned along the easy axis of particles.

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Surface relief of magnetoactive elastomeric films in a homogeneous magnetic field: molecular dynamics simulations

Abstract: The structure of a thin magnetoactive elastomeric (MAE) film adsorbed on a solid substrate is studied by molecular dynamics simulations.

Cited by 39 publications

References 63 publications

Experimental and numerical study on surface roughness of magnetorheological elastomer for controllable friction

Experimental and numerical study on surface roughness of magnetorheological elastomer for controllable friction

Modeling the magnetostriction effect in elastomers with magnetically soft and hard particles

Magnetorheological effect in elastomers containing uniaxial ferromagnetic particles

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