Tunable dynamic moduli of magnetic elastomers: from characterization by x-ray micro-computed tomography to mesoscopic modeling.

@article{Pessot2018TunableDM,
  title={Tunable dynamic moduli of magnetic elastomers: from characterization by x-ray micro-computed tomography to mesoscopic modeling.},
  author={Giorgio Pessot and Malte Sch{\"u}mann and Thomas Gundermann and Stefan Odenbach and Hartmut L{\"o}wen and Andreas M. Menzel},
  journal={Journal of physics. Condensed matter : an Institute of Physics journal},
  year={2018},
  volume={30 12},
  pages={
          125101
        }
}
Ferrogels and magnetorheological elastomers are composite materials obtained by embedding magnetic particles of mesoscopic size in a crosslinked polymeric matrix. They combine the reversible elastic deformability of polymeric materials with the high responsivity of ferrofluids to external magnetic fields. These materials stand out, for example, for significant magnetostriction as well as a pronounced increase of the elastic moduli in the presence of external magnetic fields. By means of x-ray… Expand
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References

SHOWING 1-10 OF 107 REFERENCES
Dynamic elastic moduli in magnetic gels: Normal modes and linear response.
TLDR
The present approach explicitly connects the relaxational modes of the system with the rheological properties as well as with the internal rearrangement of the particles in the sample, providing new insight into the dynamics of these remarkable materials. Expand
Statistical analysis of magnetically soft particles in magnetorheological elastomers
The physical properties of magnetorheological elastomers (MRE) are a complex issue and can be influenced and controlled in many ways, e.g. by applying a magnetic field, by external mechanicalExpand
Superelastic stress-strain behavior in ferrogels with different types of magneto-elastic coupling.
TLDR
This work extends the analysis to ferrogels where restoring torques by the surrounding matrix hinder rotations towards a magnetically favored configuration, and demonstrates that these systems still feature a superelastic regime. Expand
Dynamic moduli of magneto-sensitive elastomers: a coarse-grained network model.
TLDR
The proposed model takes into account the mechanical coupling between magnetic particles included in a whole network structure and magnetic interactions between them and shows that the application of a constant uniform magnetic field leads to the splitting of the relaxation spectrum into two branches for the motions of the particles parallel and perpendicular to the field. Expand
Investigation of the motion of particles in magnetorheological elastomers by X-μCT
The behavior of magnetic particles inside elastomeric matrices is a complex issue and can be influenced in many ways, e.g. by applying a magnetic field or external mechanical stimuli. It is ofExpand
Towards a scale-bridging description of ferrogels and magnetic elastomers.
TLDR
Interactions between mesoscopic magnetic particles connected by a polymer chain, a situation representative for particle-crosslinked magnetic gels, are analyzed to make a first step towards a scale-bridging description of the materials. Expand
In-situ observation of the particle microstructure of magnetorheological elastomers in presence of mechanical strain and magnetic fields
Abstract Magnetorheological elastomers are a type of smart hybrid material which combines elastic properties of a soft elastomer matrix with magnetic properties of magnetic micro particles. ThisExpand
X-ray micro-tomographic characterization of field-structured magnetorheological elastomers
Anisotropic magnetorheological elastomers (MREs) with four different mass percentages of iron powder were prepared in an external magnetic field. The inner structure of the samples was characterizedExpand
Deformation mechanisms in 2D magnetic gels studied by computer simulations
Magnetic gels, so-called ferrogels, consist of a polymer network, into which magnetic nanoparticles are embedded. The interesting properties of ferrogels originate from a complex interplay of theExpand
Dynamic compression testing of a tunable spring element consisting of a magnetorheological elastomer
Magnetorheological elastomers (MRE) are interesting candidates for active vibration control of structural systems. In this study, spring elements consisting of magnetorheological elastomer wereExpand
...
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5
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