Thermomechanical characterization of high temperature SMA actuators

Parikshith K. Kumar; Dimitris C. Lagoudas; Kevin J. Zanca; Magdalini Z. Lagoudas

doi:10.1117/12.658960

6 April 2006 Thermomechanical characterization of high temperature SMA actuators

Parikshith K. Kumar, Dimitris C. Lagoudas, Kevin J. Zanca, Magdalini Z. Lagoudas

Proceedings Volume 6170, Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics; 617012 (2006) https://doi.org/10.1117/12.658960
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2006, San Diego, California, United States

Abstract

The focus of this paper is the study and thermomechanical characterization of High Temperature Shape Memory Alloys (HTSMAs) at different stress levels and temperatures ranging from 300 to 500°C. The stability of the material response under cyclic actuation is also investigated. The observations deduced from the tests are presented in detail. In order to investigate the above issues a Ti₅₀Pd₄₀Ni₁₀ HTSMA was used. The alloy was fabricated by a vacuum arc melting technique, followed by casting and hot rolling. A high temperature experimental setup was developed on a load frame to test the material at high temperatures under constrained actuation conditions. Certain key observations on the material response, in terms of recoverable strains under various applied total strains and actuation stress levels, and cyclic thermomechanical behavior are presented.

Citation Download Citation

Parikshith K. Kumar, Dimitris C. Lagoudas, Kevin J. Zanca, and Magdalini Z. Lagoudas "Thermomechanical characterization of high temperature SMA actuators", Proc. SPIE 6170, Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics, 617012 (6 April 2006); https://doi.org/10.1117/12.658960

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