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Title:Uporaba superelastičnega materialnega modela za numerične simulacije stiskanja žilne opornice : magistrsko delo
Authors:ID Rihter, Jernej (Author)
ID Kramberger, Janez (Mentor) More about this mentor... New window
ID Donik, Žiga (Comentor)
Files:.pdf MAG_Rihter_Jernej_2025.pdf (1,94 MB)
MD5: 52A10317A63791847D57B41523D8A5DC
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:Žilne opornice omogočajo neoviran krvni obtok. Pogosto se za material žilnih opornic uporablja zlitina niklja in titana, znana pod komercialnim imenom Nitinol. Ta spada v skupino materialov z oblikovnim spominom. Posebna značilnost teh materialov je pojav superelastičnosti. Magistrsko delo proučuje vpliv uporabe superelastičnega in linearno elastičnega materialnega modela na rezultate simulacije stiskanja obroča žilne opornice, ki je parametrično modeliran v programskem jeziku Python in z uporabo knjižnic projektov PyAnsys (PyMAPDL). Rezultati so osredotočeni na napetosti in radialno togost, kjer opazujemo reakcijsko silo. Numerična simulacija temelji na metodi končnih elementov in je izvedena v programu Ansys. Analiza ob različnih materialnih modelih primerja tudi vpliv diskretizacije modela z enodimenzionalnimi in trodimenzionalnimi končnimi elementi. Rezultati magistrskega dela ugotavljajo, da ima materialni model pomemben vpliv na pravilen opis napetosti ob stiskanju obroča žilne opornice kot tudi na vrednosti reakcijske sile. Opazimo, da različna diskretizacija ne vpliva na reakcijsko silo, povzroča pa razlike v napetosti med obema modeloma.
Keywords:žilna opornica, spominske zlitine, superelastičnost, Nitinol, numerična simulacija, metoda končnih elementov, Ansys, Python, PyAnsys
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[J. Rihter]
Year of publishing:2025
Number of pages:1 spletni vir (1 datoteka PDF (X, 50 f.))
PID:20.500.12556/DKUM-91809 New window
UDC:[519.6:539.3]:616.1(043.2)
COBISS.SI-ID:227863555 New window
Publication date in DKUM:27.02.2025
Views:187
Downloads:84
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:07.02.2025

Secondary language

Language:English
Title:The utilization of a superelastic material model for numerical simulations of vascular stent compression
Abstract:Vascular stents allow unobstructed blood circulation. The material often used for vascular stents is an alloy of nickel and titanium, commercially known as Nitinol. It belongs to the group of shape memory materials. A particular feature of these materials is the phenomenon of superelasticity. This thesis investigates the influence of the use of a superelastic and a linear-elastic material model on the results of a compression simulation of a vascular stent ring, parametrically modelled in the Python programming language and using the PyAnsys project libraries (PyMAPDL). The results focus on stress and radial stiffness, where the reaction force is observed. The numerical simulation is based on the finite element method and is executed in Ansys. Alongside different material models, analysis also compares the effect of model discretization with one-dimensional and three-dimensional finite elements. The results of the thesis conclude that the material model has a significant influence on the correct description of the compression stress of the vascular stent ring and also on the values of the reaction force. It is observed that the discretization method does not affect reaction force, but it does cause differences in the stress between the two models.
Keywords:vascular stent, shape-memory alloys, superelasticity, Nitinol, numerical simulation, finite element method, Ansys, Python, PyAnsys


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