An experimentally-fitted thermodynamical constitutive model for polycrystalline shape memory alloys

0548146 - ÚT 2022 RIV US eng J - Článek v odborném periodiku
Benešová, Barbora - Frost, Miroslav - Kadeřávek, Lukáš - Roubíček, Tomáš - Sedlák, Petr
An experimentally-fitted thermodynamical constitutive model for polycrystalline shape memory alloys.
Discrete and Continuous Dynamical systems - Series S. Roč. 14, č. 11 (2021), s. 3925-3952. ISSN 1937-1632. E-ISSN 1937-1179
Grant CEP: GA ČR GA18-03834S; GA ČR(CZ) GA19-04956S; GA MŠMT(CZ) LTAUSA18199
Institucionální podpora: RVO:61388998 ; RVO:68378271
Klíčová slova: martensitic transformation * Nitinol wire * matematical modelling * existence of weak solutions * staggered time discretization
Obor OECD: Applied mathematics; Thermodynamics (FZU-D)
Impakt faktor: 1.865, rok: 2021
Způsob publikování: Open access
https://www.aimsciences.org/article/doi/10.3934/dcdss.2020459

Phenomenological model for polycrystalline NiTi shape-memory alloys with a refined dissipation function is here enhanced by a thermomechanical coupling and rigorously analyzed as far as existence of weak solutions and numerical stability and convergence of the numerical approximation performed by a staggered time discretization. Moreover, the model is verified on one-dimensional computational simulations compared with real laboratory experiments on a NiTi wire.
Trvalý link: http://hdl.handle.net/11104/0327521