Abstract
Despite recent progress in modelling the shape memory alloy (SMA) behaviour, many difficulties remain due to various limitations of the existing free energy models and strong nonlinearity of these nonlinear materials. Phase kinetics of SMA coupled with thermoelastodynamics is still not fully tractable, and one needs to deal with complicated multiscale character of SMA materials requiring a linkage between their microstructure and macroscopic properties. In this paper we develop a new dynamic model of 3D SMA which employs an improved version of the microscopic Landau theory. Essential properties of the single and multivariant martensitic phase transformations are recovered using consistent steps, which eliminates the problem of non-uniqueness of energy partitioning and relaxes the over-sensitivity of the free energy due to many unknown material constants in previously reported models. We exemplify our results on a model for cubic to tetragonal transformations in a rectangular SMA bar by showing key algorithmic steps which can be extended to more complex cases.
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Keywords
- Shape Memory Alloy
- Martensitic Variant
- Martensitic Phase Transformation
- Shape Memory Material
- Free Energy Model
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© 2005 Springer-Verlag Berlin Heidelberg
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Mahapatra, D.R., Melnik, R.V.N. (2005). A Dynamic Model for Phase Transformations in 3D Samples of Shape Memory Alloys. In: Sunderam, V.S., van Albada, G.D., Sloot, P.M.A., Dongarra, J. (eds) Computational Science – ICCS 2005. ICCS 2005. Lecture Notes in Computer Science, vol 3516. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11428862_4
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DOI: https://doi.org/10.1007/11428862_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-26044-8
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