Razvoj novih geometrij avksetičnih metamaterialov

magistrsko delo

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;magistrske naloge;

Data

Language:	Slovenian
Year of publishing:	2023
Typology:	2.09 - Master's Thesis
Organization:	UM FS - Faculty of Mechanical Engineering
Publisher:	J. Cesar]
UDC:	004.94:539.216/.219(043.2)
COBISS:	173154307
Views:	115
Downloads:	14
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Development of new auxetic metamaterial geometries
Secondary 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.
Secondary keywords:	computer simulations;Kelvin cell;auxetic structures;Poisson's ratio;
Type (COBISS):	Master's thesis/paper
Thesis comment:	Univ. v Mariboru, Fak. za strojništvo, Konstrukterstvo
Pages:	1 spletni vir (1 datoteka PDF (XII, 70 f.))
ID:	20049419