Numerical and experimental study on mechanical response of NiTi shape memory alloys under non-proportional loading

0450865 - ÚT 2016 RIV BE eng O - Others
Frost, Miroslav - Sedlák, Petr - Heller, Luděk - Šittner, Petr
Numerical and experimental study on mechanical response of NiTi shape memory alloys under non-proportional loading.
ESOMAT 2015. Antwerpen, Belgie: University of Antwerpen, 2015 - (Schryvers, N.; Humbeeck, J.). s. 1-1
R&D Projects: GA ČR GAP107/12/0800; GA ČR GA14-15264S; GA ČR(CZ) GP14-28306P
Institutional support: RVO:61388998 ; RVO:68378271
Keywords : shape memory alloys * non-proportional loading * elasticity of Martensite
Subject RIV: BM - Solid Matter Physics ; Magnetism; BM - Solid Matter Physics ; Magnetism (FZU-D)

This contribution presents a refined mathematical model tailored for general loading of polycrystalline NiTi SMA, which joins the influence of stress and temperature on transformation, captures anisotropy and asymmetry of response with respect to tension/compression and allows intermediate transformati on via R-phase. The model provides both macroscopic response and detailed information on internal phase composition, which can be compared with experimental data acquired by synchrotron X-ray tomography.
Permanent Link: http://hdl.handle.net/11104/0253523