Modelling of mechanical behaviour of shape memory alloys using finite elements method
Journal Title: Вісник Тернопільського національного технічного університету - Year 2018, Vol 91, Issue 3
Abstract
Superelastic behaviour of Ni-Ti alloy wire under variable amplitude loading was simulated and experimentally studied. Mechanical properties and phase transformation stresses (𝜎𝑀𝑠, 𝜎𝑀𝑓, 𝜎𝐴𝑠, 𝜎𝐴𝑓) of the material were obtained in uniaxial tensile test. The wire of 55,8% Ni – 44,2% Ti alloy with a diameter of 1,5 mm and a working length of 30 mm was tested at room temperature (+ 16°C) on the air. On the base of finite elements method, using ANSYS the stress-strain dependencies on each loading cycle were calculated. The stress-phase transformation are changes under a variable amplitude loading. The simulated stress-strain dependencies were compared with the experimental ones. The maximum error, being compared with experimental data, does not exceed 10,9%. The calculated dependences of elastic strain and dissipated energies on the amplitude stress are well agreed with experimental data. The obtained results are of theoretical and applied interest for modelling the superelastic behaviour of SMA under variable amplitude loading.
Authors and Affiliations
Petro Yasniy, Oleksandr Dyvdyk, Nadiia Lutsyk, Volodymyr Yasniy
Keywords
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- EP ID EP438023
- DOI 10.33108/visnyk_tntu2018.03.007
- Views 86
- Downloads 0
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