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Proceedings Paper

Thermodynamics of a 1D shape memory alloy: modeling, experiments, and application
Author(s): John A. Shaw; Bi-chiau Chang; Mark A. Iadicola; Yves M. Leroy
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Paper Abstract

A thermomechanical model for a shape memory alloy (SMA) wire under uniaxial loading is implemented in a finite element framework, and its results are compared with new experimental data. The constitutive model is a one-dimensional continuum model of an SMA element, including two internal field variables, strain gradient effects, possible unstable mechanical behavior, and the relevant thermomechanical couplings resulting from latent heat effects. The model is calibrated to recent experiments of typical commercially available polycrystalline NiTi wire. The shape memory effect and pseudoelastic behaviors are demonstrated numerically as a function of applied loading rate and environmental parameters, and the results are found to be quite similar to experimental data. The model is then used to simulate a simple SMA actuator device, and the model proves to be a useful tool to assess the performance.

Paper Details

Date Published: 1 August 2003
PDF: 12 pages
Proc. SPIE 5049, Smart Structures and Materials 2003: Modeling, Signal Processing, and Control, (1 August 2003); doi: 10.1117/12.507947
Show Author Affiliations
John A. Shaw, Univ. of Michigan (United States)
Bi-chiau Chang, Univ. of Michigan (United States)
Mark A. Iadicola, Univ. of Michigan (United States)
Yves M. Leroy, Lab. de Mechanique des Solides, Ecole Polytechnique, CNRS (France)


Published in SPIE Proceedings Vol. 5049:
Smart Structures and Materials 2003: Modeling, Signal Processing, and Control
Ralph C. Smith, Editor(s)

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