A numerical study on magnetostrictive phenomena in magnetorheological elastomers

Metsch, Philipp; Kalina, Karl A.; Spieler, C.; Kästner, Markus

doi:10.1016/j.commatsci.2016.08.012

Cited by 109 publications

(79 citation statements)

References 43 publications

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“…One prospective application of such materials is their use as soft actuators [22][23][24][25]. For instance, external magnetic or electric fields may induce interactions between the inclusions and lead to overall distortions [26][27][28][29][30][31][32][33][34], or net forces are imposed onto the inclusions when they are drawn into an external magnetic field gradient [35]. Our situation corresponds to the contact area where the composite material is placed on a suitable substrate.…”

Section: Introductionmentioning

confidence: 99%

Force-induced elastic matrix-mediated interactions in the presence of a rigid wall

Menzel

2017

Soft Matter

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We consider an elastic composite material containing particulate inclusions in a soft elastic matrix that is bounded by a rigid wall, e.g., the substrate. If such a composite serves as a soft actuator, forces are imposed on or induced between the embedded particles. We investigate how the presence of the rigid wall affects the interactions between the inclusions in the elastic matrix. For noslip boundary conditions, we transfer Blake's derivation of a corresponding Green's function from low-Reynolds-number hydrodynamics to the linearly elastic case. Results for no-slip and free-slip surface conditions are compared to each other and to the bulk behavior. Our results suggest that walls with free-slip surface conditions are preferred when they serve as substrates for soft actuators made from elastic composite materials. As we further demonstrate, the presence of a rigid wall can qualitatively change the interactions between the inclusions. In effect, it can switch attractive interactions into repulsive ones (and vice versa). It should be straightforward to observe the effects in future experiments and to combine our results, e.g., with the modeling of biological cells and tissue on rigid surfaces.

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Section: Introductionmentioning

confidence: 99%

Force-induced elastic matrix-mediated interactions in the presence of a rigid wall

Menzel

2017

Soft Matter

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“…Finally a circular MRE sample within a surrounding free space is simulated, where special attention is drawn to the magnetostriction [3,4], i. e. the elongation or contraction in an external field h ∞ . As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Development of a Macro‐Model for Magnetorheological Elastomers based on Microscopic Simulations

Kalina

Metsch

Brummund

et al. 2019

Proc Appl Math and Mech

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Herein, the parametrization of a macro-model for magneto-rheological elastomers based on microscopic simulations is presented. Within a computational homogenization, the effective response of the composite system is calculated and the data are used for parameter identification. The merit of this strategy is the adjustment of the model independent of any macroscopic sample geometry. With the developed model, the magnetostrictive behavior of a macroscopic sample is simulated.

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“…In the following, the applied continuum model is summarized briefly: field equations that are relevant for the presented simulations are introduced, whereas additional relations including boundary and jump conditions are omitted. For a detailed discussion of the theoretical framework, the reader is referred to [4,5].…”

Section: Theoretical Frameworkmentioning

confidence: 99%

“…For the calculation of macroscopic quantities, the homogenization framework illustrated in [5] is applied: periodic boundary conditions ensure the equivalence of microscopic and macroscopic energies. In order to allow for magnetostrictive strains in the finite element calculations, a rectangular macroscopic body which is magnetized homogeneously in the external magnetic field is assumed.…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Modeling and simulation of magnetorheological elastomers: A comparison of continuum and dipole approaches

Metsch

Romeis

Saphiannikova

et al. 2017

Proc Appl Math and Mech

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In the present work, a comparison of the results of a microscale continuum and a dipolar mean-field approach with regard to their predictions for the magnetostrictive response of magnetorheological elastomers is presented. It turns out that -for random, isotropic microstructures -there is a very good agreement between both modeling strategies. This is in contrast to former comparisons of continuum and other dipole approaches, which have shown considerable deviations.

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A numerical study on magnetostrictive phenomena in magnetorheological elastomers

Cited by 109 publications

References 43 publications

Force-induced elastic matrix-mediated interactions in the presence of a rigid wall

Force-induced elastic matrix-mediated interactions in the presence of a rigid wall

Development of a Macro‐Model for Magnetorheological Elastomers based on Microscopic Simulations

Modeling and simulation of magnetorheological elastomers: A comparison of continuum and dipole approaches

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