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Title: Uniaxial mechanical response of polycrystalline shape memory alloys
Authors: Babacan, Nazım
Özsoy, İstemi Barış
Keywords: Finite element method
Martensitic phase transformations
Polycrystalline materials
Shape memory alloys
Issue Date: 2013
Source: 2013 4th International Conference on Mechanical and Aerospace Engineering, ICMAE 2013, 20 July 2013 through 21 July 2013, Moscow, 99788
Abstract: Shape memory alloys (SMA) are materials that can remember their original shapes. Even if they are subjected to high deformations, they can return back to their original shapes when loading is removed. Their deformation mechanism is based on martensitic phase transformations (PT). In this study, uniaxial material response of polycrystalline SMA is inspected using finite element (FE) method. The material model developed by Levitas and Ozsoy (2009) is used and stress-strain diagrams and volume fractions of austenite and martensite during external loading are determined. The results are found to be in agreement with the experimental results. Moreover, increase in athermal friction, which prevents the interface propagation, delays the PT and for different friction values, different hysteresis is obtained. It is also shown that material response determined by experiments can be obtained using this model. © (2013) Trans Tech Publications, Switzerland.
ISBN: 9783037858332
ISSN: 1660-9336
Appears in Collections:Makine Mühendisliği Bölümü / Department of Mechanical Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

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