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Title:Razvoj novih geometrij avksetičnih metamaterialov : magistrsko delo
Authors:ID Cesar, Jan (Author)
ID Novak, Nejc (Mentor) More about this mentor... New window
Files:.pdf MAG_Cesar_Jan_2023.pdf (6,55 MB)
MD5: B68B56DCCDC6B172E7E377C7951D2AB1
 
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 zajeto modeliranje novih avksetičnih struktur, katere bi s svojim edinstvenim obnašanjem lahko v bodoče uporabili na širšem področju strojništva, medicine, tekstilstva idr. Avksetični metamateriali imajo to lastnost, da izkazujejo negativno Poissonovo razmerje. V delu je bilo na podlagi treh osnovnih oblik modalne analize Kelvinove celice opravljeno večje število potencialnih novih struktur, katere bi se lahko obnašale avksetično. Računalniške simulacije so bile izvedene znotraj programskega okolja LS-DYNA, kjer so bile nove strukture postavljene med dve plošči. Celotna struktura je bila tlačno obremenjena, nato je bil spremljan deformacijski odziv določene strukture. Zajeti so bili podatki o spremembah širine in dolžine posamezne strukture, čemur je sledil izračun napetosti in deformacij. V simulacijah je bila variirana debelina medceličnih povezav od 0,3 do 0,6 mm, nakar je bil spremljan deformacijski odziv. Na koncu so bili rezultati simulacij tudi obdelani in primerjani med seboj. Za vsako novo strukturo je bilo izračunano tudi pripadajoče Poissonovo razmerje, zatem je bilo ovrednoteno, ali je obnašanje avksetično ali ne.
Keywords:računalniške simulacije, Kelvinova celica, avksetične strukture, Poissonovo razmerje
Place of publishing:Maribor
Place of performance:Maribor
Publisher:J. Cesar
Year of publishing:2023
Number of pages:1 spletni vir (1 datoteka PDF (XII, 70 f.))
PID:20.500.12556/DKUM-86100 New window
UDC:004.94:539.216/.219(043.2)
COBISS.SI-ID:173154307 New window
Publication date in DKUM:25.10.2023
Views:543
Downloads:93
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:06.10.2023

Secondary language

Language:English
Title:Development of new auxetic metamaterial geometries
Abstract:This master's thesis covers the modeling of novel auxetic structures that could find future applications with their unique properties in broader fields such as mechanical engineering, medicine, the textile industry, etc. Auxetic metamaterials possess the property of exhibiting a negative Poisson's ratio. In this work, a large number of potential new structures that could exhibit auxetic behavior were investigated using three basic forms of modal analysis of the Kelvin cell. The computer simulations were conducted within the LS-DYNA software environment, with the new structures positioned between two panels. The structures underwent pressure loading, and subsequently, the response of each structure was observed. Data on the changes in the width and length of each structure were captured, followed by the calculation of stresses and strains. During the simulations, the thickness of the linear elements varied from 0,3 to 0,6 mm, and the deformation response was monitored. Finally, the results of the simulations were processed and compared with one another. For each novel structure, the corresponding Poisson's ratio was calculated, after which it was evaluated whether the behavior was auxetic or not.
Keywords:computer simulations, Kelvin cell, auxetic structures, Poisson's ratio


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