Background: Nowadays, shape memory alloys (SMAs) and in particular Ni–Ti alloys are commonly used in bioengineering applications as they join important qualities as resistance to corrosion, biocompatibility, fatigue resistance, MR compatibility, kink resistance with two unique thermo-mechanical behaviors: the shape memory effect and the pseudoelastic effect. They allow Ni–Ti devices to undergo large mechanically induced deformations and then to recover the original shape by thermal loading or simply by mechanical unloading. Method of approach: A numerical model is developed to catch the most significant SMA macroscopic thermo-mechanical properties and is implemented into a commercial finite element code to simulate the behavior of biomedical devices. Results: The comparison between experimental and numerical response of an intravascular coronary stent allows to verify the model suitability to describe pseudo-elasticity. The numerical study of a spinal vertebrae spacer, where the effects of different geometries and material characteristic temperatures are investigated, allows to verify the model suitability to describe shape memory effect. Conclusion: the results presented show the importance of computational studies in designing and optimizing new biomedical devices.
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e-mail: petrini@unipv.it
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August 2005
Technical Papers
Computational Studies of Shape Memory Alloy Behavior in Biomedical Applications
Lorenza Petrini,
Lorenza Petrini
Dipartimento di Meccanica Strutturale,
e-mail: petrini@unipv.it
Università di Pavia
, Via Ferrata 1, 27100 Pavia, Italy
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Francesco Migliavacca,
Francesco Migliavacca
Laboratory of Biological Structure Mechanics,
Politecnico di Milano
, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
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Paolo Massarotti,
Paolo Massarotti
Dipartimento di Meccanica Strutturale,
Università di Pavia
, Via Ferrata 1, 27100 Pavia, Italy; and Laboratory of Biological Structure Mechanics, Politecnico di Milano
, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
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Gabriele Dubini,
Gabriele Dubini
Laboratory of Biological Structure Mechanics,
Politecnico di Milano
, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
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Ferdinando Auricchio
Ferdinando Auricchio
Dipartimento di Meccanica Strutturale,
Università di Pavia
, Via Ferrata 1, 27100 Pavia, Italy; Istituto di Matematica Applicata e Tecnologie Informatiche, CNR, Via Ferrata 1, 27100 Pavia, Italy
Search for other works by this author on:
Lorenza Petrini
Dipartimento di Meccanica Strutturale,
Università di Pavia
, Via Ferrata 1, 27100 Pavia, Italye-mail: petrini@unipv.it
Francesco Migliavacca
Laboratory of Biological Structure Mechanics,
Politecnico di Milano
, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
Paolo Massarotti
Dipartimento di Meccanica Strutturale,
Università di Pavia
, Via Ferrata 1, 27100 Pavia, Italy; and Laboratory of Biological Structure Mechanics, Politecnico di Milano
, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
Gabriele Dubini
Laboratory of Biological Structure Mechanics,
Politecnico di Milano
, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
Ferdinando Auricchio
Dipartimento di Meccanica Strutturale,
Università di Pavia
, Via Ferrata 1, 27100 Pavia, Italy; Istituto di Matematica Applicata e Tecnologie Informatiche, CNR, Via Ferrata 1, 27100 Pavia, ItalyJ Biomech Eng. Aug 2005, 127(4): 716-725 (10 pages)
Published Online: January 24, 2005
Article history
Received:
June 21, 2004
Revised:
January 24, 2005
Citation
Petrini, L., Migliavacca, F., Massarotti, P., Schievano, S., Dubini, G., and Auricchio, F. (January 24, 2005). "Computational Studies of Shape Memory Alloy Behavior in Biomedical Applications." ASME. J Biomech Eng. August 2005; 127(4): 716–725. https://doi.org/10.1115/1.1934203
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