Analiza mehanskih lastnosti polimernih prototipov izdelanih s postopki aditivne proizvodnje

Hozdić, Emine (author), Slemenik Perše, Lidija (mentor)

Aditivna proizvodnja (angl. Additive manufacturing – AM), bolj znana kot 3D-tiskanje, prinaša številne prednosti, med katerimi izstopajo hitro prototipiranje, prilagodljivost ter raznolikost materialov. Sodobne raziskave so usmerjene v globlje razumevanje mehanskih lastnosti 3D-natisnjenih materialov. Cilj magistrske naloge je sistematično analizirati mehanske lastnosti polimernih in kompozitnih materialov, ki so bili izdelani s tehnologijo ciljnega nalaganja (angl. Fused deposition modelling – FDM), hkrati pa preučiti vpliv mineralnega motornega olja na te lastnosti. Kot izhodišče za dosego tega cilja je bila izvedena temeljita analiza domače in tuje literature na področju AM in mehanskih lastnosti 3D-natisnjenih polimernih materialov ter kompozitov. V eksperimentalnem delu magistrske naloge sta bili izvedeni obsežna raziskava in celovita analiza mehanskih lastnosti 3D natisnjenih materialov, vključno s polilaktično kislino (PLA), PLA, ojačan z ogljikovimi vlakni (PLA+CF), glikol-modificiranimi polietilen tereftalatom (PETG) in PETG, ojačan z ogljikovimi vlakni (PETG+CF). Eksperimentalna raziskava je vključevala različne oblike strukture polnjenja in gostote polnjenja ter izpostavljenost mineralnemu motornemu olju. Rezultati raziskave so pokazali, da imata oblika strukture polnjenja in gostota polnjenja pri PLA in PLA+CF natisnjenih materialih pomemben vpliv na mehanske lastnosti. Mineralno motorno olje pa je izboljšalo mehanske lastnosti vzorcev pri obeh osnovnih polimernih materialih. Pri PETG in PETG+CF materialih je bilo ugotovljeno tudi, da imata oblika strukture polnjenja in gostota polnjenja pomembno vlogo. Vpliv mineralnega motornega olja na mehanske lastnosti PETG in PETG+CF materialov pa je bil odvisen od materiala in časa izpostavljenosti. Pridobljeni rezultati imajo velik potencial za praktično uporabo, saj omogočajo boljšo selekcijo materialov v realnih aplikacijah.

• Language: Slovenian
• Keywords: aditivna proizvodnja. mehanske lastnosti, polimeri in kompoziti, mineralno motorno olje
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [E. Hozdić]
• Year: 2023
• Number of pages: XXIV, 104, [12] str.
• PID: 20.500.12556/RUL-152437
• UDC: 621.9.04:665.652.2(043.2)
• COBISS.SI-ID: 174308611
• Publication date in RUL: 24.11.2023

Secondary language

• Language: English
• Title: Analysis of the mechanical properties of polymer prototypes manufactured using additive manufacturing processes

Abstract

Additive manufacturing (AM), more commonly known as 3D printing, offers numerous advantages, including rapid prototyping, adaptability, and a wide range of materials. Modern research is focused on gaining a deeper understanding of the mechanical properties of 3D printed materials. The objective of this master's thesis is to systematically analyse the mechanical properties of polymeric and composite materials produced using Fused Deposition Modelling (FDM) technology while investigating the influence of mineral engine oil on these properties. To achieve this goal, a thorough analysis of domestic and foreign literature in the field of AM and the mechanical properties of 3D-printed polymeric materials and composites was conducted as a starting point. In the experimental part of the master's thesis, an extensive study and comprehensive analysis of the mechanical properties of 3D printed materials were performed. This included materials such as polylactic acid (PLA), carbon fiber-reinforced PLA (PLA+CF), glycol-modified polyethylene terephthalate (PETG), and carbon fiber-reinforced PETG (PETG+CF). The experimental research involved various infill patterns and infill densities, as well as exposure to mineral motor oil. The research results demonstrated that infill pattern and infill density significantly influence the mechanical properties of PLA and PLA+CF printed materials. Mineral engine oil also improved the mechanical properties of samples for both base polymeric materials. In the case of PETG and PETG+CF materials, it was found that infill pattern and infill density played a crucial role. The impact of mineral engine oil on the mechanical properties of PETG and PETG+CF materials depended on the material and the duration of exposure. The obtained results have significant potential for practical applications, enabling better material selection in real-world scenarios.

• Keywords: additive manufacturing, mechanical properties, polymers and composite, mineral engine oil