International Seminar on Mechanics and Mechanisms of Solid-Solid Phase Transformations
J. Phys. IV France 06 (1996) C1-225-C1-234
A Finite Element Calculation for the Design of Devices Made of Shape Memory AlloysS. Leclercq, C. Lexcellent and J.C. Gelin
Laboratoire de Mécanique Appliquée R. Chaléat, URA 004 du CNRS, Faculté des Sciences et des Techniques, La Bouloie, Route de Gray, 25030 Besançon cedex, France
In the first part of the paper a constitutive model for the pseudoelastic behavior of shape memory alloys (SMA) is presented in a finite element context. The model frame (state equation and phase transition kinetics) is rapidly described. Then the implementation of the model into a finite element code based on a fully implicit method consisting in an elastic prediction and phase transition correction is presented. Hence, the stress tensor and the tangent operator are calculated at each displacement increment. For a structural component as a thin plate subjected to bending loads, experimental data and finite element results are in a fair agreement. At last, an industrial application is treated for bronchial protheses used in medicine.
© EDP Sciences 1996