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Essential Measurements for Finite Element Simulations of Magnetostrictive Materials

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Details

Original languageEnglish
Article number7200107
JournalIEEE Transactions on Magnetics
Volume54
Issue number1
Early online date16 Nov 2017
DOIs
Publication statusPublished - 2018
Publication typeA1 Journal article-refereed

Abstract

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.

Keywords

  • Finite element analysis, Magnetic hysteresis, magnetomechanical coupling, Magnetostriction, magnetostriction, Strain, Tensile stress

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