J. Phys. IV France 112 (2003) 205
Superelastic behavior modeling in shape memory alloysS. Arbab Chirani1, D. Aleong2, C. Dumont1, D. McDowell2 and E. Patoor1
1 Laboratoire de Physique et Mécanique des Matériaux, UMR 7554 du CNRS, ENSAM, Metz, France
2 GWW School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, U.S.A.
The superelastic behavior of shape memory alloys is useful for several industrial applications. To dimension the SMA structures, the development of specified phenomenological constitutive models are necessary. In this case the identification of a transformation criterion is required. Unfortunately, accurate determination of the loading surface which characterizes the behavior during the martensitic transformation is experimentally difficult. A numerical simulation of this surface is proposed from a micromechanical model based on the self-consistent scale transition method. The effect of the various crystallographic textures on the shape of these surfaces is studied in CuZnAl alloys. The obtained results permit to choose the best texture according to the loading type. The validity of the normality law has been verified during the transformation procedure for studied textures.
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