Numerical Simulations of NiTi Shape Memory Alloy Wire Behaviors in Tension, Compression, and Torsion

P. Sedláka, b, M. Frosta, b aNuclear Physics Institute of the Czech Academy of Sciences, Řež 130, Řež, CZ-25068, Czech Republic bInstitute of Thermomechanics of the Czech Academy of Sciences, Dolejškova 5, Praha, CZ-18200, Czech Republic

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Numerous constitutive models of shape memory alloys aiming to reliable predictions of their remarkable thermomechanical response are available in the literature. Often, experimentally documented specifics as tension-compression asymmetry or anisotropy of some physical properties of martensite are not considered, e.g. because it is difficult to determine them experimentally without dedicated instrumentation. Hence, parameterization of the models is limited to data from tensile tests, yet the models are used to predict material response in more general loading modes. This contribution addresses limits and pitfalls of such a modeling shortcut. It is also shown that an accurate prediction of NiTi wire response in torsion can be obtained with parameters derived from a test in tension and compression, which challenges the general comprehension of the influence of the processing texture.

DOI:10.12693/APhysPolA.134.842 PACS numbers: 62.20.fg, 46.15.-x