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Proceedings Paper

Experiments of thermomechanical fatigue of SMAs
Author(s): Dimitris C. Lagoudas; David A. Miller
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Paper Abstract

As SMA wires are gaining in popularity for use as actuators, one constitutive parameter that remain unknown is the thermomechanical fatigue life. Even though the effect of thermal cycles on the transformation characteristics of SMAs has been studied, these teste have not been extended to high number of cycles. In this study, a novel test frame developed to study the thermomechanical fatigue life of SMAs is described. Additionally, a testing protocol is discussed necessary to fully establish the fatigue characteristics of SMAs under various conditions. Initial results of the initial test show a substantial increase in the number of cycles to failure as the applied stress level reduces to approximately 100 MPa.

Paper Details

Date Published: 12 July 1999
PDF: 8 pages
Proc. SPIE 3675, Smart Structures and Materials 1999: Smart Materials Technologies, (12 July 1999); doi: 10.1117/12.352798
Show Author Affiliations
Dimitris C. Lagoudas, Texas A&M Univ. (United States)
David A. Miller, Texas A&M Univ. (United States)

Published in SPIE Proceedings Vol. 3675:
Smart Structures and Materials 1999: Smart Materials Technologies
Manfred R. Wuttig, Editor(s)

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