12 July 1999 Experiments of thermomechanical fatigue of SMAs
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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.
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Dimitris C. Lagoudas, Dimitris C. Lagoudas, David A. Miller, David A. Miller, } "Experiments of thermomechanical fatigue of SMAs", Proc. SPIE 3675, Smart Structures and Materials 1999: Smart Materials Technologies, (12 July 1999); doi: 10.1117/12.352798; https://doi.org/10.1117/12.352798
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