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Proceedings Paper

Phenomenological modeling of induced transformation anisotropy in shape memory alloy actuators
Author(s): Darren J. Hartl; Alexandros Solomou; Dimitris C. Lagoudas; Dimitris Saravanos
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Paper Abstract

This paper considers new extensions to a three-dimensional constitutive model originally developed by Lagoudas and co-workers. The proposed model accurately and robustly captures the highly anisotropic transformation strain generation and recovery observed in actuator components that have been subjected to common material processing and training methods. A constant back stress tensor is introduced into the model, which is implemented in an exact form for simple tension/torsion loading as well as into a commercial finite element code to perform a 3-D analysis of a Shape Memory Alloy (SMA) torque tube actuator subjected to different loading schemes. Numerical correlations between predicted and available experimental results demonstrate the accuracy of the model.

Paper Details

Date Published: 28 March 2012
PDF: 14 pages
Proc. SPIE 8342, Behavior and Mechanics of Multifunctional Materials and Composites 2012, 83421M (28 March 2012); doi: 10.1117/12.915972
Show Author Affiliations
Darren J. Hartl, Texas A&M Univ. (United States)
Alexandros Solomou, Univ. of Patras (Greece)
Dimitris C. Lagoudas, Texas A&M Univ. (United States)
Dimitris Saravanos, Univ. of Patras (Greece)

Published in SPIE Proceedings Vol. 8342:
Behavior and Mechanics of Multifunctional Materials and Composites 2012
Nakhiah C. Goulbourne; Zoubeida Ounaies, Editor(s)

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