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master's thesis
Primjena nenewtonskih tekućina u izradi polimernih kompozita
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2024. urn:nbn:hr:235:255739
Ivanković, Luka
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

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Ivanković, L. (2024). Primjena nenewtonskih tekućina u izradi polimernih kompozita (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:255739

Ivanković, Luka. "Primjena nenewtonskih tekućina u izradi polimernih kompozita." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2024. https://urn.nsk.hr/urn:nbn:hr:235:255739

Ivanković, Luka. "Primjena nenewtonskih tekućina u izradi polimernih kompozita." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2024. https://urn.nsk.hr/urn:nbn:hr:235:255739

Ivanković, L. (2024). 'Primjena nenewtonskih tekućina u izradi polimernih kompozita', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 23 November 2024, https://urn.nsk.hr/urn:nbn:hr:235:255739

Ivanković L. Primjena nenewtonskih tekućina u izradi polimernih kompozita [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2024 [cited 2024 November 23] Available at: https://urn.nsk.hr/urn:nbn:hr:235:255739

L. Ivanković, "Primjena nenewtonskih tekućina u izradi polimernih kompozita", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:235:255739

Metadata
TitlePrimjena nenewtonskih tekućina u izradi polimernih kompozita
Title (english)Application of non-Newtonian fluids in the production of polymer composites
AuthorLuka Ivanković
MentorZdravko Schauperl (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2024-05-16, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
Tekućine kod kojih viskoznost (pri konstantnoj temperaturi) ovisi o uvjetima tečenja (brzini smicanja, smičnom naprezanju) nazivaju se nenewtonske tekućine. Kad se viskoznost tekućine povećava s povećanjem smične brzine govori se o posmičnom zgušnjavanju/zadebljanju. Posmično zgušnjavajuća tekućina (engl. Shear-thickening fluid, STF) se pod primijenjenim naprezanjem, zbog povećanja viskoznosti, ponaša kao čvrsti materijali, a kada se opterećenje ukloni iz medija, STF prelazi u početno tekuće stanje. To jedinstveno svojstvo pobudilo je veliku pozornost znanstvenika fokusiranih na razvoj pametnih materijala i struktura za zaštitne primjene. U ovom radu dan je prikaz dosadašnjih istraživanja polimernih kompozitnih materijala ojačanih tkaninama impregniranim s nenewtonskim (STF) tekućinama, te objašnjeni mehanizmi zaštite od kinetičkih penetratora. Nadalje, istraživan je utjecaj impregnacije različitih tkanina (načinjenih od staklenih, aramidnih, bazaltnih i UHMWPE vlakana) nenewtonskom tekućinom koja pokazuje posmično zgušnjavanje (na temelju silicijevog dioksida i polietilen glikola) na svojstva epoksidnih kompozitnih materijala. Mehanička svojstva uzoraka procijenjena su pomoću vlačnog pokusa i ispitivanja udarnog rada loma.
Abstract (english)
Liquids whose viscosity (at constant temperature) depends on the flow conditions (shear rate, shear stress) are called non-Newtonian liquids. If the viscosity of the liquid increases with increasing shear rate, it is called a shear-thickening fluid. Shear-thickening fluid (STF) behaves like solid materials under applied stress due to the increase in viscosity, and when the load is removed from the medium, STF changes to the initial liquid state. This unique property has attracted a lot of attention from scientists focused on the development of smart materials and structures for protective applications. In this paper, an overview of the current research on polymer composite materials reinforced with fabrics impregnated with non-Newtonian (STF) fluids is given, and the mechanisms of protection against kinetic penetrators are explained. Furthermore, the influence of impregnation of different fabrics (made of glass, aramid, basalt and UHMWPE fibers) with a non-Newtonian liquid showing shear thickening (based on silica and polyethylene glycol) on the properties of epoxy composite materials was investigated. The mechanical properties of the samples were evaluated using a tensile test and an impact fracture test
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:255739
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2024-05-09 14:39:52