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TUTCRIS

Essential Measurements for Finite Element Simulations of Magnetostrictive Materials

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli7200107
JulkaisuIEEE Transactions on Magnetics
Vuosikerta54
Numero1
Varhainen verkossa julkaisun päivämäärä16 marraskuuta 2017
DOI - pysyväislinkit
TilaJulkaistu - 2018
OKM-julkaisutyyppiA1 Alkuperäisartikkeli

Tiivistelmä

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.