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Title: Structural fatigue and fracture of shape memory alloy actuators: Current status and perspectives
Shape Memory Alloy (SMA)-actuators are efficient, simple, and robust alternatives to conventional actuators when a small volume and/or large force and stroke are required. The analysis of their failure response is critical for their design in order to achieve optimum functionality and performance. Here, (i) the existing knowledge base on the fatigue and overload fracture response of SMAs under actuation loading is reviewed regarding the failure micromechanisms, empirical relations for actuation fatigue life prediction, experimental measurements of fracture toughness and fatigue crack growth rates, and numerical investigations of toughness properties and (ii) future developments required to expand the acquired knowledge, enhance the current understanding, and ultimately enable commercial applications of SMA-actuators are discussed.  more » « less
Award ID(s):
1917441
PAR ID:
10347778
Author(s) / Creator(s):
;
Date Published:
Journal Name:
Journal of Intelligent Material Systems and Structures
Volume:
33
Issue:
12
ISSN:
1045-389X
Page Range / eLocation ID:
1475 to 1486
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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