Precision instrument for characterizing shape memory alloy wires in bias spring actuation

Sumanth Chikkamaranahalli, R. Ryan Vallance, Afzal Khan, Eric R. Marsh, Osamah A. Rawashdeh, J. E. Lumpp, Bruce L. Walcott

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Some metallic alloys such as Nitinol (NiTi) exhibit the shape memory effect, which is suitable for generating force and displacement when the alloy changes phase during a heating and cooling cycle. These shape memory alloys are often formed into one-dimensional wires, tubes, and ribbons that are preloaded by bias springs to create inexpensive actuators for electromechanical devices. This article describes a new instrument for measuring the quasistatic characteristics of the alloy and the transient performance of bias-spring actuators when resistively heated and convectively cooled. The instrument achieves more accurate measurements by eliminating rolling friction and by sensing force and displacement in line with the bias spring and shape memory alloy wire. Data from the instrument enables calculation of stress and strain at constant temperatures and during actuation cycles.

Original languageEnglish (US)
Article number065105
JournalReview of Scientific Instruments
Volume76
Issue number6
DOIs
StatePublished - Jun 28 2005

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shape memory alloys
Shape memory effect
actuation
wire
Wire
Actuators
actuators
electromechanical devices
Electromechanical devices
cycles
ribbons
friction
Friction
tubes
Cooling
cooling
Heating
heating
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

Chikkamaranahalli, S., Vallance, R. R., Khan, A., Marsh, E. R., Rawashdeh, O. A., Lumpp, J. E., & Walcott, B. L. (2005). Precision instrument for characterizing shape memory alloy wires in bias spring actuation. Review of Scientific Instruments, 76(6), [065105]. https://doi.org/10.1063/1.1920629
Chikkamaranahalli, Sumanth ; Vallance, R. Ryan ; Khan, Afzal ; Marsh, Eric R. ; Rawashdeh, Osamah A. ; Lumpp, J. E. ; Walcott, Bruce L. / Precision instrument for characterizing shape memory alloy wires in bias spring actuation. In: Review of Scientific Instruments. 2005 ; Vol. 76, No. 6.
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Chikkamaranahalli, S, Vallance, RR, Khan, A, Marsh, ER, Rawashdeh, OA, Lumpp, JE & Walcott, BL 2005, 'Precision instrument for characterizing shape memory alloy wires in bias spring actuation', Review of Scientific Instruments, vol. 76, no. 6, 065105. https://doi.org/10.1063/1.1920629

Precision instrument for characterizing shape memory alloy wires in bias spring actuation. / Chikkamaranahalli, Sumanth; Vallance, R. Ryan; Khan, Afzal; Marsh, Eric R.; Rawashdeh, Osamah A.; Lumpp, J. E.; Walcott, Bruce L.

In: Review of Scientific Instruments, Vol. 76, No. 6, 065105, 28.06.2005.

Research output: Contribution to journalArticle

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