Fracture resistance of shape memory alloys under thermomechanical loading

Makkar, J.; Young, Ben; Караман, И.; Baxevanis, Theocharis

doi:10.1016/j.engfracmech.2021.108059

Cited by 4 publications

(1 citation statement)

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“…Recently, the first experimental measurement of the fracture toughness of SMAs under actuation loading conditions was reported (Makkar et al, 2021b). The interpretation of the data was based on an approximation of the value of the modified J * -integral introduced in Section “Damage Tolerance Approaches” by the load–load line displacement record measured.…”

Section: Overload Fracturementioning

confidence: 99%

Structural fatigue and fracture of shape memory alloy actuators: Current status and perspectives

Hasan

Baxevanis

2021

Journal of Intelligent Material Systems and Structures

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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.

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