Next Article in Journal
Characterization of a Pre-Clinical Mini-Pig Model of Scaphoid Non-Union
Next Article in Special Issue
An Efficient Finite Element Framework to Assess Flexibility Performances of SMA Self-Expandable Carotid Artery Stents
Previous Article in Journal
Journal of Functional Biomaterials Best Paper Award 2015
Previous Article in Special Issue
Applications of Shape Memory Alloys for Neurology and Neuromuscular Rehabilitation
Open AccessArticle

Modeling Permanent Deformations of Superelastic and Shape Memory Materials

1
SAES Getters S.p.A., v.le Italia, 77, 20020 Lainate (MI), Italy
2
Università di Pavia, Via Ferrata 9, 27100 Pavia, Italy
*
Author to whom correspondence should be addressed.
Academic Editors: Tony Anson and Lorenza Petrini
J. Funct. Biomater. 2015, 6(2), 398-406; https://doi.org/10.3390/jfb6020398
Received: 1 April 2015 / Revised: 25 May 2015 / Accepted: 28 May 2015 / Published: 11 June 2015
(This article belongs to the Special Issue Biomedical Applications of Shape Memory Alloys)
In this paper we propose a modification of the polycrystalline shape memory alloy constitutive model originally proposed by Souza. By introducing a transformation strain energy with two different hardening coefficients, we are able to take into account the effect of the martensitic transformation of unfavorably oriented grains occurring after the main plateau. By choosing a proper second hardening coefficient, it is possible to reproduce the correct stress strain behavior of the material after the plateau without the need of introducing a much smaller Young modulus for martensite. The proposed modification is introduced in the model comprising permanent deformation effects. Model results for uniaxial stress tests are compared to experimental results showing good agreement. View Full-Text
Keywords: superelasticity; shape memory alloys; constitutive modeling; elastic modulus; functional fatigue superelasticity; shape memory alloys; constitutive modeling; elastic modulus; functional fatigue
Show Figures

Figure 1

MDPI and ACS Style

Urbano, M.F.; Auricchio, F. Modeling Permanent Deformations of Superelastic and Shape Memory Materials. J. Funct. Biomater. 2015, 6, 398-406.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop