Prerada i ispitivanje polimernih kompozitnih tvorevina ojačanih 3D staklenim tkaninama

master's thesis

• Title (english): Processing and testing of polymer composite product reinforced with 3D glass fabrics
• Author: Luka Kapac
• Mentor: Ana Pilipović (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-12, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

Kompozitni materijali se izrađuju u cilju postizanja upravo onih svojstava koja nisu ostvariva kod pojedinačnih komponenata. Najveća prednost kompozitnih materijala je niska masa uz dobra mehanička svojstva i zbog toga postaju sve prisutniji u raznim granama industrije, posebno u transportnoj industriji. U ovom radu opisana je podjela kompozita prema materijalu matrice i ojačavala, gdje se najveća pažnja posvetila vlaknima ojačanim polimernim kompozitima. Opisani su najznačajniji postupci prerade kompozita s naglaskom na postupak ručnog laminiranja koji je primijenjen u eksperimentalnom dijelu rada. Industrija iskazuje sve veće zanimanje za izradu predoblika (tkanje) koja su blizu veličini i obliku gotovog proizvoda za vlaknima ojačane kompozite. Tradicionalno se predoblik izrađivao od 2D tkanina, no nedavno se pokazalo da se 3D tkanine mogu uspješno upotrebljavati. Glavne prednosti 3D tkanina uključuju smanjenje mase, uklanjanje delaminacije, smanjen rizik od pukotina, kraće vrijeme proizvodnje i smanjenje troškova. Glavnja prednost smanjenje mase ujedno je i okosnica ovog diplomskog rada da se ustanovi primjena tih materijala u transportnoj industriji. U eksperimentalnom dijelu opisana je izrada pet kompozitnih ploča od 3D staklenih tkanina tvrtke Parabeam. Provedena su ispitivanja rasteznih i savojnih svojstava i žilavosti. Na temelju rezultata provedena je usporedba i analiza.

Abstract (english)

Composite materials are made in order to achieve properties that are not achievable with individual components. The biggest advantage of composite materials is low mass with good mechanical properties and therefore they are becoming more and more present in various branches of industry, especially in the transport industry. This paper describes the division of composites according to the matrix material and reinforcements, where the greatest attention was paid to fiber reinforced polymer composites. The most significant methods of composite processing are described, with an emphasis on the hand lay-up procedure used in the experimental part of the paper. The industry is showing increasing interest in making roving preforms that are close to the size and shape of the finished product for fiber-reinforced composites. Traditionally, the preform was made of 2D fabrics, but recently it has been shown that 3D fabrics can be used successfully. The main advantages of 3D fabrics include weight reduction, removal of delamination, reduced risk of cracks, shorter production time and reduced costs. The main advantage of weight reduction is also the backbone of this thesis to establish the application of these materials in the transport industry. In the experimental part, the production of five composite panels made from Parabeam 3D glass fabrics is described. Tensile, flexural properties and toughness tests were performed. Based on the results, a comparison and analysis was performed.

• Keywords: 3D tkanina; kompozitni materijali; rastezna svojstva; savojna svojstva; transportna industrija; žilavost
• Keywords (english): 3D fabric; bending properties; composite materials; tensile properties; toughness; transport industry
• Language: croatian
• URN:NBN: urn:nbn:hr:235:200457
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-12-01 16:43:32