Thermomechanically Transforming Notched NiTi Thin Ribbon: Effect of Martensitic Transformation on Stress Gradients
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F19%3APU135100" target="_blank" >RIV/00216305:26210/19:PU135100 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S2452321620302225" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2452321620302225</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.prostr.2020.01.155" target="_blank" >10.1016/j.prostr.2020.01.155</a>
Alternative languages
Result language
angličtina
Original language name
Thermomechanically Transforming Notched NiTi Thin Ribbon: Effect of Martensitic Transformation on Stress Gradients
Original language description
In this work, we used numerical simulations to investigate the effect of thermally induced forward martensitic transformation(MT) under constant load on thestress redistribution around stress risers. Finite element simulations of stress redistribution around two-sided notches in a thin NiTi ribbon subjected to constant tensile force and homogeneous cooling from austenite to martensite were performed. Changesin stress gradients around the notches were analyzed with regard to heterogeneity of thermomechanically driven MT. A parametric study was performed in order to understand the effect of transformation strains, Young’s modulus of martensite and notch radiuson the magnitude of notch-tip stresses after the completion of MT. We found that forward MT critically amplifies the initial elastic stress gradients around the notch. The increase in magnitude of notch-tip stress is closely related to elastic deformation in martensite needed to accommodate the transformation strain in the surrounding notch unaffected zone. This approximation holds for notch radii being small compared to the ribbon width. For large radiiMT is more homogeneous, the notch-tip is more shielded from transforming surroundings and, hence, the notch-tip stress approach the nominal stress.
Czech name
—
Czech description
—
Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
20501 - Materials engineering
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Procedia Structural Integrity
ISBN
978-80-214-5760-7
ISSN
2452-3216
e-ISSN
—
Number of pages
6
Pages from-to
620-625
Publisher name
Elsevier
Place of publication
neuveden
Event location
Brno
Event date
Jun 26, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
—