Three-Dimensional Thermomechanical Model for Shape Memory Alloys Exhibiting R-Phase Transformation and Material Anisotropy

0387955 - ÚT 2013 RIV AT eng C - Conference Paper (international conference)
Sedlák, Petr - Frost, Miroslav - Benešová, Barbora - Zineb, T.B. - Šittner, Petr
Three-Dimensional Thermomechanical Model for Shape Memory Alloys Exhibiting R-Phase Transformation and Material Anisotropy.
8th European Solid Mechanics Conference. Graz: Verlag der Technischen Universität Graz, 2012 - (Holzapfen, G.; Ogden, R.), s. 1-2. ISBN 978-3-85125-223-1.
[European Solid Mechanics Conference - ESMC 2012 /8./. Graz (AT), 09.07.2012-13.07.2012]
R&D Projects: GA ČR GA106/09/1573
Institutional research plan: CEZ:AV0Z20760514; CEZ:AV0Z10100520
Keywords : shape memory alloys * thermomechanical modeling * dissipation/yield
Subject RIV: BI - Acoustics; JG - Metallurgy (FZU-D)

Despite of remarkable progress of shape memory alloys (SMAs) thermomechanical modeling in past decades, there is still ongoing work in development of robust models able to cover complex material behavior when multiple loading modes are involved. R-phase transition is present or highly anisotropic behavior is exhibited. In the present work, a new three-dimensional macroscopic model for SMAs is formulated within a thermomechanical framework for rate-independent dissipative materials. The constitutive behavior is fully determined by formulation of the energy and the dissipation/yield functions. The loading history is effectively captured by introduction of internal variables. By a particular choice of imposed constraints, tension-compression asymmetry and anisotropic material behavior are included.
Permanent Link: http://hdl.handle.net/11104/0217220