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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 72: Polymer Networks and Elastomers

CPP 72.5: Vortrag

Mittwoch, 18. März 2020, 16:15–16:30, ZEU 114

Constitutive modelling of magneto-sensitive elastomers — •Sanket Chougale, Dirk Romeis, and Marina Saphiannikova — Institute Theory of Polymers, IPF, Dresden, Germany

One type of field-controllable materials are magneto-sensitive elastomers (MSEs) with magnetically switchable properties. They consist of magnetizable particles incorporated within an elastomer matrix. In the presence of an external magnetic field, the induced magnetic interactions and the corresponding particle rearrangements change the mechanical properties substantially. This leads to change in the macroscopic shape of MSE. The magnetic field also introduces a mechanical anisotropy with an axis of symmetry along the field. As a results, MSE can be studied phenomenologically as a transversely isotropic material. Our aim to derive an effective material model from the free energy of MSE in the dipole approximation. As a first step we consider uniaxial deformations parallel and perpendicular to the applied field direction. We compare the stresses derived from the physical model of MSE with the stresses derived from the phenomenological model and find a good agreement. This allows us to extract the coefficients of transversely isotropic material model. We thank the DFG for financial support through RTG-2430.