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A Numerical/Experimental Study of Nitinol Actuator Springs

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Abstract

This study deals with the numerical modeling, simulation and experimental analysis of shape-memory alloy (SMA) helicoidal springs. An experimental campaign is conducted on both SMA straight wires and helicoidal springs that experienced the same annealing process. Then, we use such experimental results to investigate three phenomenological constitutive models able to represent SMA macroscopic behavior. In particular, after the identification of all the material parameters from experimental results on SMA wires, we inspect the thermo-mechanical behavior of SMA helicoidal springs by comparing numerical predictions to experimental data. Finally, we discuss models capabilities and some aspects characterizing SMA material behavior.

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Acknowledgments

The authors are grateful to Luca Fumagalli and coworkers for samples preparation, and to Alberto Coda and Andrea Cadelli for the experimental characterization.

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Authors and Affiliations

  1. DICAr, Università di Pavia, Pavia, Italy

    Ferdinando Auricchio

  2. DICAM, Università di Bologna, Bologna, Italy

    Giulia Scalet

  3. SAES Getters S.p.A, Milano, Lainate, Italy

    Marco Urbano

Authors
  1. Ferdinando Auricchio
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  2. Giulia Scalet
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  3. Marco Urbano
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Corresponding author

Correspondence to Marco Urbano.

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Auricchio, F., Scalet, G. & Urbano, M. A Numerical/Experimental Study of Nitinol Actuator Springs. J. of Materi Eng and Perform 23, 2420–2428 (2014). https://doi.org/10.1007/s11665-014-0883-1

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  • DOI: https://doi.org/10.1007/s11665-014-0883-1

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