Behavior of SMA actuators under nonproportional thermomechanical loading

Zhonghe Bo; Dimitris C. Lagoudas; David A. Miller

doi:10.1117/12.316353

24 July 1998 Behavior of SMA actuators under nonproportional thermomechanical loading

Zhonghe Bo, Dimitris C. Lagoudas, David A. Miller

Proceedings Volume 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures; (1998) https://doi.org/10.1117/12.316353
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

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.

Citation Download Citation

Zhonghe Bo, Dimitris C. Lagoudas, and David A. Miller "Behavior of SMA actuators under nonproportional thermomechanical loading", Proc. SPIE 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures, (24 July 1998); https://doi.org/10.1117/12.316353

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