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Popravilo pregiba čevlja za smučarske skoke z uporabo steklenih vlaken
ID Capuder, Martin (Author), ID Šturm, Roman (Mentor) More about this mentor... This link opens in a new window, ID Bergant, Zoran (Comentor)

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Abstract
V diplomski nalogi smo najprej opravili pregled literature kompozitnih materialov in veziv za popravilo čevljev za smučarske skoke. Opisan je postopek popravila z izboljšavo lastnosti smučarskega čevlja v pregibu, s čimer ne podaljšamo le življenjske dobe čevlja, ampak omogočimo skakalcu tudi boljši občutek v vseh fazah skoka. Po dolgotrajni uporabi pa se na pregibu v kompozitu pojavljajo delaminacije in razpoke, ki so posledica nizke oprijemne trdnosti med plastmi. Na podlagi literature o kompozitnih materialih, tkaninah in njihovih površinskih obdelavah, ki omogočijo večjo oprijemno trdnost med plastmi smo izbrali dve vrsti steklenih tkanin (platno, keper) in ju primerjali glede trdnosti in kakovosti adhezijskega oprijema s strižnimi in upogibnimi preizkusi ter z mikrostrukturno analizo porušenih standardnih vzorcev. Na osnovi rezultatov in analiz smo ugotovili, da so vlakna s keper pletenjem bolj primerna za popravilo, saj se ob manjši razslojitvi predvideva tudi kasnejša obraba kompozita zaradi zunanjih vplivov, predvsem vlage, ki je stalno prisotna na ojačanem delu.

Language:Slovenian
Keywords:steklena vlakna, epoksi smola, polimerni kompoziti, strižni preizkus, upogibni preizkus, impregnacija tkanin, delaminacije
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FS - Faculty of Mechanical Engineering
Place of publishing:Ljubljana
Publisher:[M. Capuder]
Year:2021
Number of pages:XXII, 46 str.
PID:20.500.12556/RUL-127958 This link opens in a new window
UDC:620.174:666.189.2:678(043.2)
COBISS.SI-ID:70937859 This link opens in a new window
Publication date in RUL:30.06.2021
Views:960
Downloads:90
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Secondary language

Language:English
Title:Repair of the bend of a ski jumping shoe using fiberglass
Abstract:
In the diploma thesis, the literature review of composite materials and binders for the repair of ski boots with reinforcement of the bend was made. The repair process leads to improvement of the properties of the ski boot in the bend section, which not only prolongs the life-span of the boot, but also allows for a better feel during all phases of jump. After a long-term use, delaminations and cracks appear on the bend, which are the result of low inter-laminar strength between the layers. Aim of the research was evaluate different type of fabrics which would yield to a higher quality of material. A review of the literature on composite materials, fabrics, and their surface treatments, which provide greater grip strength between layers, was performed. We selected and compared the strength and quality of the adhesion of two types of glass fabrics (plain, twill) using shear and bending test, followed by microscopy of failed specimens. Based on the results and analyzes, we found that the fibers with twill knitting are more suitable for repair, as with less stratification, later wear of the composite due to external influences, especially moisture, which is constantly present on the reinforced part.

Keywords:fiberglass, epoxy resin, polymer composites, shear test, flexural test, fiber sizing, delamination

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