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Proceedings Paper

A cyclic model for superelastic shape memory alloys
Author(s): Luc Saint-Sulpice; Shabnam Arbab Chirani; Sylvain Calloch
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Paper Abstract

This study concerns the superelasticity of Shape Memory Alloys (SMA) under cyclic loading. A particular attention is paid to the evolution of residual strain with number of cycles (like ratcheting in cyclic plasticity of classical metals). To study the phenomenology of the cyclic behavior and to identify the origin of the developed residual strain a series of cyclic uniaxial tensile tests on copper based alloys wires has been realized. A macroscopic model describing the cyclic behavior of superelastic SMA has been proposed. The originalities of the model are, on the one hand, the definition of a particular elasticity domain when the material is in a two phased state and, on the other hand, an ad hoc kinetic of transformation strain taking into account a residual strain evolution. The proposed model has been identified using our experimental data base and has been used to simulate various cyclic multiaxial loadings.

Paper Details

Date Published: 20 April 2007
PDF: 10 pages
Proc. SPIE 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007, 65262F (20 April 2007); doi: 10.1117/12.718091
Show Author Affiliations
Luc Saint-Sulpice, ENSIETA, MSN (France)
Shabnam Arbab Chirani, ENIB, LRM (France)
Sylvain Calloch, ENSIETA, MSN (France)

Published in SPIE Proceedings Vol. 6526:
Behavior and Mechanics of Multifunctional and Composite Materials 2007
Marcelo J. Dapino, Editor(s)

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