Journal
SENSORS AND ACTUATORS A-PHYSICAL
Volume 319, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2021.112568
Keywords
Shape memory actuator; NiTi; Shape memory alloys; Thermal cycling; Stiffness
Funding
- Russian Science Foundation [19-79-00106]
- Russian Science Foundation [19-79-00106] Funding Source: Russian Science Foundation
Ask authors/readers for more resources
The study investigates the influence of counter-body stiffness on the recovery stress, recoverable strain, and work output during thermal cycling of NiTi cylindrical samples in the actuator regime. Results show a nonlinear relationship between stiffness values and shape memory effect/recovery stress, and a gradual decrease in recovery stress, work output values during thermal cycling.
The influence of the counter-body stiffness on the recovery stress, recoverable strain and work output variations during the thermal cycling of NiTi cylindrical samples in the actuator regime has been studied. Pre-deformed samples were connected by one side to a pendulum dynamometer with variable stiffness, which played the role of elastic counter-body, and the other sample side was fixed. Two schemes of pre-deformation under torsion mode were used: active deformation in martensite state, or cooling under constant stress. It was shown that the shape memory effect and recovery stress value depended non-linearly on stiffness values. Work output was calculated for all samples. The optimal interval of stiffness, which provided maximum output, was found in both preliminary deformation schemes used. It was shown that for samples deformed by cooling under constant stress, the values of shape memory effect, maximum recovery stress and work output were higher than for the samples pre-deformed in the martensite state. The shape memory effect, maximum recovery stress and work output values decreased on thermal cycling. (C) 2021 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available