Numerical study on localization of phase transformation in niti shape memory wires

0470949 - ÚT 2017 RIV CH eng C - Conference Paper (international conference)
Frost, Miroslav - Sedlák, Petr - Šittner, Petr
Numerical study on localization of phase transformation in niti shape memory wires.
Solid State Phenomena. Zurich: Scientific.Net, 2017 - (Šandera, P.), s. 141-144. Materials Structure & Micromechanics of Fracture VIII, 258. ISBN 978-30-383-5626-4. ISSN 1012-0394. E-ISSN 1662-9779.
[International Conference on Material Structure & Micromechanics of Fractture /8./. Brno (CZ), 27.06.2016-29.06.2016]
R&D Projects: GA ČR(CZ) GP14-28306P
Institutional support: RVO:61388998 ; RVO:68378271
Keywords : shape memory alloys * NiTi * localized deformation * numerical implementation
OECD category: Condensed matter physics (including formerly solid state physics, supercond.); Condensed matter physics (including formerly solid state physics, supercond.) (FZU-D)
http://www.ttp.net/978-3-03835-626-4.html

Martensitic phase transformation in NiTi shape memory alloys (SMA) can spread either homogenously or in localized martensitic transformation bands. Transformation band propagation is usually observed in particular loading modes (tension) and geometries of specimen (wires, thin ribbons). In this work, a well established NiTi SMA constitutive model is enhanced so that strain softening of the material response during stress induced phase transition is covered. A nonlocal integral averaging technique is adopted and the model is implemented into a finite element (FE) software.
Permanent Link: http://hdl.handle.net/11104/0270505