Determination of the characteristic parameters of tension-compression asymmetry of Shape Memory Alloys using full-field measurements

Yves Chemisky (1) , Rachid Echchorfi (1) , Fodil Meraghni (1) , Nadine Bourgeois (1) , Boris Piotrowski (1)

1 LEM3 - Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux

In this work, a method for the identification of the transformation surface of Shape Memory Alloys based on full field measurements is presented. An inverse method coupled with a gradient-based algorithm has been developed to determine the characteristic parameters of the transformation surface. The constitutive equations of the chosen model that capture the macroscopic behavior of Shape Memory Alloys are first presented. The material parameters, to be identified, that are characteristic of the tension-compression asymmetry of the alloy are detailed. The identification algorithm, based on full field measurements obtained by Digital Image Correlation (DIC) and numerical simulation by Finite Element Analysis are introduced. The identification algorithm is validated using a numerically generated strain field on a Meuwissen-type specimen.

Mots clés: Identification; Shape Memory Alloys; transformation surface; tension-compression asymmetry.

Domaines: Matériaux; Mécanique [physics.med-ph]; Mécanique des matériaux [physics.class-ph]; Mécanique des solides [physics.class-ph]

Yves Chemisky, Rachid Echchorfi, Fodil Meraghni, Nadine Bourgeois, Boris Piotrowski. Determination of the characteristic parameters of tension-compression asymmetry of Shape Memory Alloys using full-field measurements. European Symposium on Martensitic Transformations (ESOMAT), Sep 2012, Saint-Pétersbourg, Russia. ⟨10.4028/www.scientific.net/MSF.738-739.281⟩. ⟨hal-01366683⟩