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Title:KARAKTERIZACIJA IN ANALIZA NATEZNIH PARAMETROV 3D NATISNJENIH POLIMERNIH IN KOMPOZITNIH MATERIALOV
Authors:ID Čistar, Marko (Author)
ID Hozdić, Elvis (Mentor) More about this mentor... New window
Files:.pdf MAG_Cistar_Marko_2025.pdf (4,91 MB)
MD5: A50AB1F49B50482D1EA8DC27548636C3
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:UNM FS - University of Novo mesto - Faculty of Mechanical engineering
Abstract:Magistrsko delo preučuje vpliv gostote izpolnilne strukture in časovne izpostavljenosti hladilno-mazalnemu sredstvu na mehanske lastnosti 3D natisnjenih polimernih in kompozitnih materialov. S tehnologijo nalaganja staljenega materiala (FDM) so bili natisnjeni preizkušanci iz PLA, PLA+CF in PA+CF z različnimi gostotami izpolnilne strukture (40 %, 60 %, 80 % in 100 %) ter izpostavljeni hladilno-mazalnemu sredstvu za 7 in 30 dni. Natezni preizkusi so bili izvedeni skladno s standardom ISO 527-2. Rezultati kažejo, da večja gostota izpolnilne strukture povečuje natezno trdnost, vendar daljša izpostavljenost hladilno-mazalnemu sredstvu povzroča njen upad, najbolj izrazito pri 100 % gostoti izpolnilne strukture, kjer se je po 30 dneh zmanjšala za več kot 14 %. Pri Youngovem modulu je opaziti različne trende: pri 40 % in 80 % gostoti se je povečal, medtem ko se je pri 60 % in 100 % zmanjšal. To potrjuje kompleksen vpliv mazalnega sredstva na strukturo materialov. Ugotovitve prispevajo k boljšemu razumevanju vpliva strukturnih parametrov in okoljskih dejavnikov na mehanske lastnosti 3D natisnjenih delov ter omogočajo optimizacijo njihove uporabe v industriji.
Keywords:Aditivna proizvodnja, FDM tehnologija, Hladilno-mazalna sredstva, Gostota izpolnilne strukture, Mehanske lastnosti, Oblika izpolnilne strukture
Year of publishing:2025
PID:20.500.12556/ReVIS-11648 New window
COBISS.SI-ID:234346243 New window
Publication date in ReVIS:26.04.2025
Views:681
Downloads:11
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Secondary language

Language:English
Title:CHARACTERIZATION AND ANALYSIS OF TENSILE PARAMETERS OF 3D-PRINTED POLYMER AND COMPOSITE MATERIALS
Abstract:This master's thesis investigates the influence of infill density and prolonged exposure to a cooling lubricant on the mechanical properties of 3D-printed polymeric and composite materials. Using Fused Deposition Modeling (FDM), test specimens were fabricated from PLA, PLA+CF, and PA+CF, each featuring varying infill densities (40%, 60%, 80%, and 100%). These specimens were subjected to cooling lubricant exposure for 7 and 30 days, followed by tensile testing in accordance with the ISO 527-2 standard. The results demonstrate that increasing infill density enhances tensile strength; however, prolonged exposure to the cooling lubricant leads to a decline, most significantly at 100% infill density, where tensile strength decreased by more than 14% after 30 days. Young’s modulus exhibited varying trends: it increased at 40% and 80% infill densities, while it decreased at 60% and 100%. This indicates a complex interaction between the cooling lubricant and the structural properties of the materials. These findings contribute to a deeper understanding of the effects of structural parameters and environmental factors on the mechanical performance of 3D-printed components, facilitating the optimization of their application in industrial settings.
Keywords:Additive manufacturing, FDM technology, Coolant lubricant, Infill density, Mechanical properties, Infill pattern


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