Simulation of mechanical behavior of NiTi shape memory alloys under complex loading: Model formulation and its performance in applications

0442999 - ÚT 2016 RIV US eng C - Conference Paper (international conference)
Sedlák, Petr - Frost, Miroslav - Kruisová, Alena - Šittner, Petr - Heller, Luděk
Simulation of mechanical behavior of NiTi shape memory alloys under complex loading: Model formulation and its performance in applications.
ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2014. Vol. 1. Newport: American Society of Mechanical Engineers, 2014, V001T03A010-V001T03A010. 1, SMASIS2014-7465. ISBN 978-0-7918-4614-8.
[ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2014. Newport (US), 08.09.2014-10.09.2014]
R&D Projects: GA ČR GA13-13616S; GA ČR(CZ) GP14-28306P; GA ČR GA14-15264S; GA ČR GAP107/12/0800
Institutional support: RVO:61388998 ; RVO:68378271
Keywords : shape memory alloys * modeling * helical spring
Subject RIV: BM - Solid Matter Physics ; Magnetism; BM - Solid Matter Physics ; Magnetism (FZU-D)
http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleID=2022104

A constitutive model tailored for non-proportionally loaded shape memory alloys exhibiting R-phase transition, transformation strain anisotropy, tension-compression asymmetry is employed to reveal and interpret relation between macroscopic response of a NiTi helical spring actuator and microscopic state within the shape memory material. Numerical simulations demonstrate that because of naturally non-proportional loading mode, phase and stress distributions within the cross-section of the wire may be rather complex and counterintuitive.
Permanent Link: http://hdl.handle.net/11104/0245782