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Proceedings Paper

Behavior of SMA actuators under nonproportional thermomechanical loading
Author(s): Zhonghe Bo; Dimitris C. Lagoudas; David A. Miller
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Paper Abstract

The application of SMA actuators in smart structures usually involve thermally induced phase transformation with a variable applied stress in SMA actuators, resulting in thermomechanical non-proportional loading of SMAs in stress-temperature space. To investigate the constitutive response of SMAs under thermomechanical non-proportional loading, experiments for thermally induced phase transformation of binary NiTi SMA wires loaded by an elastic linear spring are performed in the Active Materials Laboratory at Texas A&M University. A constitutive model developed by Bo and Lagoudas and Lagoudas and Bo is used as the basis for the theoretical prediction of the response of SMA line actuators loaded by springs with different elastic constants. Model predictions are compared with experimental results.

Paper Details

Date Published: 24 July 1998
PDF: 10 pages
Proc. SPIE 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures, (24 July 1998); doi: 10.1117/12.316353
Show Author Affiliations
Zhonghe Bo, Texas A&M Univ. (United States)
Dimitris C. Lagoudas, Texas A&M Univ. (United States)
David A. Miller, Texas A&M Univ. (United States)

Published in SPIE Proceedings Vol. 3323:
Smart Structures and Materials 1998: Mathematics and Control in Smart Structures
Vasundara V. Varadan, Editor(s)

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