Numerical Analysis of Joule Heating in a Ni–Ti Segmented Wire used in Sensing Applications

Use of shape memory alloy (SMA) has been extensively increased to fabricate sensors and actuators. It is because of its inherently unique properties such as pseudo-elasticity and shape memory effect. Among various SMA’s, Ni–Ti SMA has received a prime interest in various applications. However, Ni–Ti...

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Bibliographic Details
Published in:Journal of the Institution of Engineers (India): Series D 2023-06, Vol.104 (1), p.301-308
Main Authors: Farooqui, Tareq Ahmed, Belwanshi, Vinod, Rane, Kedarnath, Bhole, Kiran Suresh, Oak, Sachin
Format: Article
Language:English
Subjects:
Actuators
Boundary conditions
Engineering
Finite element method
High temperature effects
Mathematical models
Numerical analysis
Numerical models
Ohmic dissipation
Original Contribution
Resistance heating
Sensors
Shape effects
Shape memory alloys
Thermal response
Wire
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Summary:Use of shape memory alloy (SMA) has been extensively increased to fabricate sensors and actuators. It is because of its inherently unique properties such as pseudo-elasticity and shape memory effect. Among various SMA’s, Ni–Ti SMA has received a prime interest in various applications. However, Ni–Ti SMA-based sensors suffer from the Joule heating effect as their performance is impacted due to an increase in the temperature. This work presents a finite element analysis approach to estimate a rise in temperature in Ni–Ti SMA sensors. A numerical model was developed in COMSOL, considering a Ni–Ti with Cu segment. Electro-thermal boundary conditions were set to assess the thermal response of the segmented wire. Multiple simulation runs were carried out by varying material and geometric characteristics of segmented wire. The results are validated against the literature and quantitative estimation of thermal characteristics through physics driven analytical model. Simulation results show that the Joule heating effect has a significant effect on the properties of the material which can be considered while designing and selecting the sensor application. This study further brought a few mitigation actions which can minimize the Joule heating effect without hindering the performance of Ni–Ti SMA-based sensors.
ISSN:2250-2122
2250-2130
DOI:10.1007/s40033-022-00392-4