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.
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