Određivanje geometrije 3D ispisane replike krvne žile koja zadovoljava fiziološke promjere tijekom srčanog ciklusa

master's thesis

• Title (english): Determination of 3D printed blood vessel replica that reproduces physiological diameters during cardiac cycle
• Author: Ivan Krešimir Letica
• Mentor: Igor Karšaj (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2023-01, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Precision Mechanical Engineering

Abstract

Aditivna proizvodnja (3D printanje) dobiva sve veći značaj u medicinskoj industriji. Osim u
proizvodnji umjetnih tkiva, njena primjena je vidljiva i u raznim istraživanjima u području
zdravstvenog razvoja. Cilj ovog rada je dobivanje modela neopterećene geometrije krvnih žila,
aorta, s aneurizmom. Ti modeli namijenjeni su za proizvodnju 3D printanjem uporabom
hiperelastičnih materijala. Oni su dobiveni numeričkom metodom koja se temelji na mehanici
kontinuuma. U toj se metodi uzimaju medicinski podaci o geometriji opterećenih krvnih žila
kod ljudi te se iterativnim proračunom dolazi do geometrije neopterećenih krvnih žila. U radu
su izvedeni i zapisani izrazi korišteni u numeričkoj metodi te je opisano na koji način se ona
provodi. Njom su dobiveni modeli aorti s aneurizmom od jednog i više hiperelastičnih
materijala. Modeli su analizirani metodom konačnih elemenata te je njihova opterećena
geometrija uspoređena s geometrijom stvarnih ljudskih žila s aneurizmom.

Abstract (english)

Additive manufacturing (3D printing) is gaining more and more importance in the medical
industry. In addition to the production of artificial tissues, its application is also visible in
various research in the field of health development. The aim of this paper is to obtain models
of the unloaded geometry of blood vessels, aorta, with an aneurysm. These models are intended
for production by 3D printing using hyperelastic materials. They were obtained by a numerical
method based on continuum mechanics. In this method, medical data on the geometry of human
loaded blood vessels are taken, and the geometry of unloaded blood vessels is arrived at by an
iterative calculation. In the paper, the expressions used in the numerical method are derived and
written down, and the way in which they are implemented is described. It was used to obtain
models of aorta with aneurysm made out from one or more hyperelastic materials. The models
were analyzed using the finite element method and their loaded geometry was compared with
the geometry of real human blood vessels with aneurysm.

• Keywords: aneurizma; krvne žile; aditivna proizvodnja; mehanika kontinuuma; hiperelastični materijali; metoda konačnih elemenata
• Keywords (english): aneurysm; blood vessels; additive manufacturing; continuum mechanics; hyperelastic materials; finite element method
• Language: croatian
• URN:NBN: urn:nbn:hr:235:755366
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-01-18 07:21:54