Finite element analysis on the effect of martensitic transformation and plastic deformation on the stress concentration factor in a thin notched superelastic NiTi ribbon

0563609 - FZÚ 2023 RIV SG eng J - Journal Article
Shayanfard, Pejman - Šittner, Petr - Heller, Luděk - Šandera, P.
Finite element analysis on the effect of martensitic transformation and plastic deformation on the stress concentration factor in a thin notched superelastic NiTi ribbon.
Functional Materials Letters. Roč. 13, č. 5 (2020), č. článku 2051028. ISSN 1793-6047. E-ISSN 1793-7213
R&D Projects: GA ČR GA18-03834S; GA ČR GA16-20264S
Institutional support: RVO:68378271
Keywords : Stress concentration factor (K-tn) * shape memory alloy * superelastic * martensitic transformation * plastic deformation * stress intensity factor (SIF) * finite element * NiTi * notched ribbon
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.170, year: 2020
Method of publishing: Limited access
https://doi.org/10.1142/S1793604720510285

The severe nonlinear behavior caused by the martensitic transformation (MT) and subsequent plastic deformation (PD) of detwinned martensite leads to a complex local stress redistribution at the location of stress risers of superelastic shape memory alloy (SMA) components. Nevertheless, in the literature, the simple linear elastic fracture mechanics (LEFM) equations are widely used in the evaluation of the fracture response of superelastic components which has resulted in obvious conflicts between the conclusions regarding the effect of MT on the fracture parameters, i.e. stress intensity factor (SIF) and material toughness.

Permanent Link: https://hdl.handle.net/11104/0335518