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Title:Analiza utrujanja osnosimetrične kiralne celične strukture iz nerjavnega jekla 316l : magistrsko delo
Authors:ID Žnidarič, Žiga (Author)
ID Glodež, Srečko (Mentor) More about this mentor... New window
ID Novak, Nejc (Comentor)
Files:.pdf MAG_Znidaric_Ziga_2024.pdf (4,75 MB)
MD5: 96D6A7B05B97F31A9655BEA5C1ED3C9C
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:V magistrskem delu je izvedena simulacija utrujanja osnosimetrične kiralne celične strukture in njene modificirane oblike, narejenih iz nerjavnega jekla 316L. Opisane so teoretične osnove celičnih struktur s predstavitvijo obeh geometrij. Nadaljuje se s teoretičnimi osnovami utrujanja materialov, s poudarkom na deformacijski metodi. Opisano je, kako sta bili generirani geometriji s pomočjo programske kode in prilagojeni za uporabo v numeričnih simulacijah. Sledilo je določevanje materialnih parametrov, obremenitev, podpor in podatkov za izračun življenjske dobe. Geometriji sta bili obremenjeni s pomiki v obliki sinusnega valovanja. Modela sta bila diskretizirana z mrežo končnih elementov, določeno s konvergenčno analizo. Podatke smo beležili v tabelah, s pomočjo katerih smo izrisali grafe, ki prikazujejo, kako se življenjska doba spremeni v odvisnosti od velikosti obremenitve. Sledili smo tudi poteku napetosti in stopnjam plastične deformacije, ki se pojavijo v strukturah. Rezultati so pokazali, da kljub boljši porazdelitvi napetosti je življenjska doba optimizirane strukture krajša.
Keywords:celične strukture, avksetičnost, deformacijska metoda, ciklično utrujanje, numerična analiza, življenjska doba
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[Ž. Žnidarič]
Year of publishing:2024
Number of pages:1 spletni vir (1 datoteka PDF (XII, 53 f.))
PID:20.500.12556/DKUM-89575 New window
UDC:620.178.3:669.14.018.8-176(043.2)
COBISS.SI-ID:208015107 New window
Publication date in DKUM:21.08.2024
Views:260
Downloads:92
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:23.07.2024

Secondary language

Language:English
Title:Fatigue analysis of axisymmetric chiral cellular structure made out of 316l stainless steel
Abstract:In the master's thesis, fatigue analysis of an axisymmetric chiral cellular structure and its modified form, made of stainless steel 316L, is carried out. The theoretical foundations of cellular structures are described, and the two geometries are presented. It continues with theoretical basics of material fatigue with an emphasis on strain-life method. We continue with describing how the geometries were generated using a script and adapted for use in numerical simulations. This was followed by the determination of material parameters, loads, supports and data for calculation life expectancy. Displacement in the shape of a sine wave was used as the load on both specimens. The models were divided with a finite element mesh determined by convergence analysis. The data was recorded and presented in graphs that showed how the life expectancy of the structures changes depending on the level of strain. We also analyzed stresses and plastic deformation that occur in the structures. The results showed that despite a better distribution of stress, the life expectancy of the optimized structure was shorter.
Keywords:cellular structures, auxetic behaviour, strain-life method, cyclic fatigue, numerical analysis, life expectancy


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