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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 31: Responsive and Adaptive Systems
CPP 31.7: Vortrag
Mittwoch, 11. März 2026, 11:15–11:30, ZEU/0255
Modeling of magnetic hysteresis in magneto-active elastomers — •Pawan Patel1,2, Dirk Romeis1, and Marina Saphiannikova1,2 — 1Leibniz-Institut für Polymerforschung Dresden e.V, Hohe Straße 6, 01069, Dresden, Germany — 2Faculty of Mechanical Science and Engineering, Dresden University of Technology, 01062, Dresden, Germany
Magneto-active elastomers (MAEs) are soft polymer composites containing magnetizable microparticles. MAEs exhibit field-dependent mechanical and magnetic properties. When subjected to an external magnetic field, MAEs display magneto-mechanical coupling effects such as tunable stiffness and reversible shape changes. This study presents a multiscale theoretical model to describe the magnetic hysteresis behavior of MAEs, focusing on the role of microstructure evolution during magnetization and demagnetization of microparticles. The total energy of the system is formulated as the sum of magnetic and micromechanical contributions, while macroscopic deformation of the cylindrical sample is constrained. The model incorporates both pure dipole--dipole interactions and near field effect to account for multipole higher-order particle interactions. The results reveal that magnetic hysteresis in soft magnetic MAEs arises primarily from microstructural rearrangements, where the spatial configuration of particles differs between increasing and decreasing magnetic fields. Simulations demonstrate that parameters such as particle volume fraction, sample geometry, and micromechanical stiffness significantly influence the hysteresis loop width.
Keywords: Magneto-active elastomers (MAEs); Magnetic hysteresis; Dipole-dipole interactions; Near field effect; Microstructure evolution