Dispositif de mesure du comportement magnéto-mécanique d'un alliage de fer-silicium sous chargement mécanique multiaxial

Abstract : The research presented in this paper is motivated by the design of rotors for high speed rotating machines. The increased power density of these devices requires a higher rotation speed, leading to higher levels of centrifugal forces and stress in the rotor. A first point is to ensure good mechanical strength of the materials. A second point is to take into account changes in the magnetic behavior (and ultimately torque) when they are subjected to a multiaxial stress state. Non conventional experiments are performed on cross-shaped samples in order to apply biaxial stress representative of the loadings experienced by rotors of rotating machines. These experiments are performed on a multiaxial testing machine, Astrée. Stress level is estimated thanks to digital image correlation and X-rays diffraction. Both anhysteretic and dissipative magnetic responses to magneto-mechanical loadings have been recorded.
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Mahmoud Rekik, Olivier Hubert, Laurent Daniel, Bumedijene Raka, Pierre Mella, et al.. Dispositif de mesure du comportement magnéto-mécanique d'un alliage de fer-silicium sous chargement mécanique multiaxial. Congrès Français de Mécanique 2013, AFM, Aug 2013, Bordeaux, France. ⟨hal-01552415⟩

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