Ni-Mn-Ga sigle crystal shape memory alloy magneto-thermo-mechanical modeling.

Jean-Yves Gauthier (1) , Christian Lexcellent (2) , Arnaud Hubert (2) , Joël Abadie (2) , Nicolas Chaillet (2)

1 LGEF - Laboratoire de Génie Electrique et Ferroélectricité
2 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)

In the frame of Thermodynamics of irreversible process, a model describing the thermomagneto-mechanical behavior of a single crystal of Ni-Mn-Ga is built. The choice of internal variables is linked to the physics of the problem (fraction of martensite variants, fraction of Weiss domains, magnetization angle). The simulations permit to describe the paths in the space (stress, temperature, magnetic field) in agreement with experimental tests. A special attention will be devoted to the control laws required to use these functional materials as sensors or actuators.

Domaines: Micro et nanotechnologies/Microélectronique

Jean-Yves Gauthier, Christian Lexcellent, Arnaud Hubert, Joël Abadie, Nicolas Chaillet. Ni-Mn-Ga sigle crystal shape memory alloy magneto-thermo-mechanical modeling.. 14th International Conference on Experimental Mechanics (ICEM 14)., Jul 2010, Poitiers, France. 7 p., ⟨10.1051/epjconf/20100629003⟩. ⟨hal-00585487⟩