Essential Measurements for Finite Element Simulations of Magnetostrictive Materials

We discuss which magnetoelastic material properties are essential to measure in order to model magnetostrictive materials in finite element simulations. We show knowing the magnetic constitutive relation is sufficient, if the elastic behavior without magnetic field is known a priori. We neglect hyst...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2018-01, Vol.54 (1), p.1-7
Main Authors: Poutala, Arto, Kovanen, Tuomas, Kettunen, Lauri
Format: Article
Language:English
Subjects:
Computer simulation
Constitutive relationships
Deformation effects
Elasticity
Finite element analysis
Finite element method
Flux density
Magnetic flux
Magnetic hysteresis
Magnetic properties
Magnetism
magnetomechanical coupling
Magnetostriction
Material properties
Mathematical analysis
Open source software
Strain
Tensile stress
Tensors
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Summary:We discuss which magnetoelastic material properties are essential to measure in order to model magnetostrictive materials in finite element simulations. We show knowing the magnetic constitutive relation is sufficient, if the elastic behavior without magnetic field is known a priori. We neglect hysteresis, and our starting point is to express the effect of mechanical deformation on the magnetic constitutive relation with a small strain tensor and magnetic flux density. It follows that the (energetic) state of a magnetostrictive material is independent of its history. Then, a certain choice of history allows us to keep magnetism and elasticity distinct. We demonstrate with open source software Elmer, how one can set up such magnetoelastic simulations. These simulations rely on data obtained from magnetostrictive measurements. Finally, it is discussed how a measurement setup and the finite element model should be combined in order to verify the approach with experiments.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2017.2766599