Analiza kompozitov za streho jadrnic

Križaj, Miha (author), Nagode, Aleš (mentor)

Zaradi dobrih mehanskih lastnosti, dobre korozijske odpornosti ter nizke mase je uporaba kompozitov v ladjedelništvu zelo razširjena. Namen te diplomske naloge je bil izdelati cenovno ugoden kompozitni material, z ustreznimi mehanskimi lastnostmi za strehe jadrnic. V ta namen smo izdelali kompozitne plošče iz različnih kombinacij materialov po dveh različnih postopkih izdelave in sicer po postopku infuzije in polaganja v mokrem. Na kompozitnih materialih smo izvedli upogibni preizkus, analizirali mikrostrukturne sestavine ter naredili cenovno analizo. Pri mikrostrukturni analizi smo ugotovili, da so vlakna bolj narazen pri kompozitih narejenih po načinu polaganja v mokrem in da so posamezne plasti bolj narazen pri kompozitih z matico iz epoksi smole. Vsi vzorci so uspešno prestali upogibni preizkus. Vseeno smo ugotovili, da je v kompozitih narejenih z načinom mokrega polaganja nastalo manj napak kot pri kompozitih narejenih z infuzijo. Enako velja za kompozite z armaturo iz ogljikovih vlaken in kompozite z matico iz epoksi smole. Pri cenovni analizi smo ugotovili, da je najcenejša kombinacija materialov kombinacija vinilesterske smole utrjene s steklenimi vlakni. Na podlagi dobljenih rezultatov je bilo določeno, da je od preiskovanih kompozitnih materialov za strehe jadrnic najbolj primeren kompozit z matico iz vinilesterske smole uterjene s steklenimi vlakni, ki je narejen po postopku polaganja v mokrem.

• Language: Slovenian
• Keywords: kompoziti s polimerno matico (PMC), ogljikova vlakna, steklena vlakna, mikrostrukturna analiza, upogibni preizkus, cenovna analiza
• Work type: Bachelor thesis/paper
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Year: 2019
• PID: 20.500.12556/RUL-111006
• COBISS.SI-ID: 1838175
• Publication date in RUL: 22.09.2019

KRIŽAJ, Miha, 2019, Analiza kompozitov za streho jadrnic [online]. Bachelor’s thesis. [Accessed 24 June 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=111006

Secondary language

• Language: English
• Title: Analysis of composites for sailboat hardtops

Abstract

Because of their good mechanical properties, good corrosion resistance and their low density the use of composites in boatbuilding is widespread. The purpose of this diploma work was to fabricate a composite material with appropriate mechanical properties for a sailboat hardtop at a satisfactory price. Therefore, the composite plates with different combinations of materials were made, following two different processing routes: infusion and wet lay-up. The samples were subjected to a bend test, their microstructures were analyzed and a cost analysis was made. Microstructural analysis showed that the fibers are more apart in the composites by wet lay-up processing route, and that individual layers are more apart in the composites with epoxy resin as a matrix. None of the samples failed during bend test. Nevertheless, it was seen that the composites made by wet lay-up had less flaws than the composites made by infusion. The same goes for the composites with carbon fibers (reinforcement) and the composites with epoxy resin (matrix). The cost analysis showed that the cheapest combination of materials was a combination of vinylester resin as a matrix and glass fiber as reinforced material. On the basis of the obtained results, it was concluded that the most appropriate composite material for the sailboat hardtop would be the one with vinylester resin matrix reinforced with glass fibers and made by wet lay-up process.

• Keywords: polymer matrix composites (PMCs), carbon fibers, glass fibers, microstructure characterization, bend test, cost analysis