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Title:Karakterizacija deformacijskega in mehanskega obnašanja avksetičnega kompozitnega metamateriala : diplomsko delo
Authors:ID Kolar, Miha (Author)
ID Novak, Nejc (Mentor) More about this mentor... New window
Files:.pdf Diplomska_naloga.pdf (2,63 MB)
MD5: 6B37CCE88E72BD814B3EA7A64445E43E
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:Prispevek predlaga inovativen večmaterialen pristop za vpeljavo avksetičnega obnašanja v področje sintaktičnih pen. Z natančnim oblikovanjem velikosti, oblike in orientacije sintaktične pene je bilo doseženo avksetično deformacijsko obnašanje. Najprej so bili iz ekspandiranega perlita in mavca izdelani šestkotni elementi v obliki peščene ure, nato pa je bil avksetični vzorec teh elementov razporejen v škatlo iz nerjavnega jekla. Prazni prostori med vložki so bili zapolnjeni z aluminijevo zlitino (A356) s pomočjo uporabe tehnike proti gravitacijskega litja. Vliti avksetični kompozit je imel gostoto 1,52 g/cm3. Izdelan preizkušanec je bil nato deformiran s kvazi-statično obremenitvijo, da bi lahko okarakterizirali njegovo deformacijsko obnašanje in določili njegove mehanske lastnosti, zlasti Poissonovo število. Deformacija kompozita je bila avksetična s Poissonovim številom -1,04. Za boljše razumevanje mehanizma in zagotavljanje možnosti za nadaljnjo optimizacijo geometrije so bile izvedene računalniške simulacije po metodi končnih elementov.
Keywords:avksetične celične strukture, sintaktične pene, eksperimentalno testiranje, mehanske lastnosti, Poissonovo število
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[M. Kolar]
Year of publishing:2024
Number of pages:1 spletni vir (1 datoteka PDF (IX, 26 f.))
PID:20.500.12556/DKUM-89569 New window
UDC:620.17:620.168(043.2)
COBISS.SI-ID:218508035 New window
Publication date in DKUM:06.12.2024
Views:200
Downloads:121
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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Licences

License:CC BY-SA 4.0, Creative Commons Attribution-ShareAlike 4.0 International
Link:http://creativecommons.org/licenses/by-sa/4.0/
Description:This Creative Commons license is very similar to the regular Attribution license, but requires the release of all derivative works under this same license.
Licensing start date:22.07.2024

Secondary language

Language:English
Title:Characterization of deformation and mechanical behaviour of the auxetic composite metamaterial
Abstract:This thesis proposes an innovative multi-material approach for introducing auxetic behaviour to syntactic foams (SFs). By carefully designing the size, shape, and orientation of the SFs, auxetic deformation behaviour was induced. Re-entrant hexagon-shaped SF elements were fabricated using expanded perlite (EP) particles and a plaster of Paris slurry first. Then an auxetic pattern of these SF elements was arranged within a stainless-steel casting box. The empty spaces between the SF elements were filled with molten aluminium alloy (A356) using the counter-gravity infiltration casting technique. The cast auxetic composite had a bulk density of 1.52 g/cm3 . The cast composite was then compressed under quasi-static loading to characterise its deformation behaviour and to determine the mechanical properties, especially the Poisson’s ratio. The cast composite deformation was auxetic with a Poisson’s ratio of −1.04. Finite Element (FE) simulations were conducted to understand the deformation mechanism better and provide means for further optimisation of the geometry.
Keywords:Auxetic cellular structures, syntactic foams, experimental testing, mechanical properties, Poisson’s ratio


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