Bibliography
Journal Article
Thermomechanical model for NiTi-based shape memory alloys covering macroscopic localization of martensitic transformation
, , , , ,
: International Journal of Solids and Structures vol.221, 1 (2021), p. 117-129
: GA18-03834S, GA ČR
: NiTi shape memory alloys, constitutive modeling, localization, Mori-Tanaka method
: 10.1016/j.ijsolstr.2020.08.012
: http://library.utia.cas.cz/separaty/2021/MTR/kruzik-0538049.pdf
: https://doi.org/10.1016/j.ijsolstr.2020.08.012
(eng): The work presents a thermomechanical model for polycrystalline NiTi-based shape memory alloys developed within the framework of generalized standard solids, which is able to cover loading-mode dependent localization of the martensitic transformation. The key point is the introduction of a novel austenite–martensite interaction term responsible for the strain-softening of the material. Mathematical properties of the model are analyzed, and a suitable regularization and a time-discrete approximation for numerical implementation to the finite-element method are proposed. Model performance is illustrated on two numerical simulations: the tension of a superelastic NiTi ribbon and bending of a superelastic NiTi tube.
: BA
: 10101