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A Comparative Study Of Ni49.9 Ti50.1 And Ni50.3 Ti29.7 Hf20 Tube Actuators, J. Owusu-Danquah, A. Saleeb, B. Dhakal, S. Padula
A Comparative Study Of Ni49.9 Ti50.1 And Ni50.3 Ti29.7 Hf20 Tube Actuators, J. Owusu-Danquah, A. Saleeb, B. Dhakal, S. Padula
Atef Saleeb
A shape memory alloy (SMA) actuator typically has to operate for a large number of thermomechanical cycles due to its application requirements. Therefore, it is necessary to understand the cyclic behavioral response of the SMA actuation material and the devices into which they are incorporated under extended cycling conditions. The present work is focused on the nature of the cyclic, evolutionary behavior of two widely used SMA actuator material systems: (1) a commercially available Ni49.9Ti50.1, and (2) a developmental high-temperature Ni50.3Ti29.7Hf20 alloy. Using a recently developed general SMA modeling framework that utilizes multiple inelastic mechanisms, differences and similarities between the …