Dresden 2009 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 26: Magnetic Shape Memory Alloys II

MA 26.3: Vortrag

Mittwoch, 25. März 2009, 15:15–15:30, HSZ 103

A general phase-field model for polycrystals with elastic and micromagnetic contributions — •Christian Mennerich, Andreas Melcher, and Britta Nestler — Institute of Computational Engineering, Karlsruhe University of Apllied Sciences, Germany

A phase-field model coupled with elastic and micromagnetic contributions is introduced to describe the time spatial evolution of a polycrystal under the influence of strains and in the presence of a magnetic field. We introduce the model in terms of a general Ginzburg-Landau free energy functional and derive a coupled system of partial differential equations for the vector valued phase-field variables, for the displacement-field and for the spontaneous magnetisation. Applications of the model to cubic and tetragonal crystal symmetries of the polycrystal are discussed. Finally we give a short insight into the numerical implementation.