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Methodology design and proper measurement setting evaluation of ultrasound testing of composite propellers
Běhal, Antonín ; Horák, Marek (referee) ; Katrňák, Tomáš (advisor)
This thesis focuses on non-destructive ultrasonic testing of composite aircraft propellers. The theoretical part contains a review of manufacturing technologies of laminate propellers and their design. The practical part of the thesis contains the design of ultrasonic testing methodology. Dolphicam 2+ device is used for testing. The creation of appropriate settings of the ultrasonic device, for different laminate thicknesses, is performed on calibration samples containing artificially created defects. By comparing the default and modified settings, it was found that the use of the modified settings greatly improves the distinguishability of the defects from the defect-free laminate. Confirmation of the functionality of the modified setup is performed using a real propeller test. The work serves as a sample procedure for testing a laminate propeller by ultrasonic defect detection.
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Manufacturing of a composite part using out of autoclave prepregs
Krátký, Jan ; Gregor, Lukáš (referee) ; Kupčák, Radim (advisor)
This bachelor thesis deals with the production of a composite part using out-of-autoclave prepregs. The theoretical part describes composite materials, their properties and different manufacturing technologies with special emphasis on prepregs and the curing process. The practical part includes test specimen design, mould preparation, prepreg placement, lamination and curing. Three laminations were carried out using different technologies. The results show that the surface quality of the composite parts is significantly affected by the mould quality and curing pressure. Atmospheric pressure proved insufficient to achieve the desired surface quality of the moulded parts during vacuum pressing. The main conclusion of the paper is that off-autoclave technologies have the potential to produce high quality composite parts, but require further optimization of processes and materials.
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Comparison of characteristics of pre-impregnated and conventional carbon fibre epoxy laminates
Jones, Phillip ; Juračka, Jaroslav (referee) ; Katrňák, Tomáš (advisor)
The focus of this thesis is a comparison of pre-impregnated and conventional carbon fibre laminates. The first part focuses on the production process of carbon fibre composites from the process of converting PAN to carbon fibres to the lay-up and curing process of completed parts. The second section includes numerical comparisons of different types of carbon fibre. The data is set up in a fashion to demonstrate the improvements in carbon fibre mechanical properties by comparing outdated carbon fibre to the newest fibre on the market. The included tables aid in the process of choosing the right type of carbon fibre for each specific application.
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Composite Chassis for Formula Student
Mende, Milan ; Šebela, Kamil (referee) ; Janoušek, Michal (advisor)
The Master’s thesis deals with the design and production of a composite chassis of the new formula Dragon X. The carbon prepreg used for manufacturing of the monocoque was to be operated at high temperatures. Therefore, this thesis deals with the application of composites structures in the high temperature environment. The thesis addresses the torsional stiffness problematics and it was not only physically tested, but also simulated by FEM analysis and the results were compared.
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Production of Multilayer PCB
Janda, Ondřej ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
This master thesis introduces the problematics of multilayer printed circuit boards. Theoretical part is focused on materials used for production of multilayer PCB and their parameters. At the same time, it focuses on the pressing process of multi-layered PCB, the types of presses used and their advantages and disadvantages. Practical part describes the methodology and testing of the PCB to identify the reliability of chosen electrical parameters. Testing is aimed to simulate thermal stress during machine soldering and during thermal stress in the target environment.
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Application of a reusable vacuum membrane for production of fiber reinforced plastics
Talavášek, Václav ; Zouhar, Jan (referee) ; Gregor, Lukáš (advisor)
The thesis focuses on the manufacturing process of the composites with fiber reinforcement and polymer matrix. The theoretical part contains a description of conventional manufacturing processes. The experimental part of the thesis was based on the design modification of an old convention mold. The aim was to make design changes for the usage of a vacuum membrane. On the mold were made several tests. The goal was to find out the design faults of the mold. The next chapter focuses on the economic comparison of the conventional process and the reusable vacuum membrane process. The last chapter focuses on the design of a new mold, which is going to be utilized for mass production.
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Technology of manufacturing of carbon fibre composites by hot forming
Přikryl, Pavel ; Slaný, Martin (referee) ; Zouhar, Jan (advisor)
This master’s thesis deals with the composite materials and especially aims on the carbon and glass fiber composites. It points out different composition types and manufacturing methods which reflect in the different mechanical properties, final quality of the manufactured part and also in the manufacturing time. The practical part includes two particular manufacturing methods using prepregs, one cured in an autoclave and one by hot compression moulding.
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Application of composite materials for sport optics
Kupčák, Radim ; Slaný, Martin (referee) ; Zouhar, Jan (advisor)
In Its first half this master's thesis describes composite materials with carbon fiber reinforced plastics being the main focus point. An overview of production technologies follows. The major objective of the second part of this master's thesis is to design and manufacture a simplified model of an optical device using prepregs.
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Production technology of dental composite
Menčík, Přemysl ; Poláček, Petr (referee) ; Přikryl, Radek (advisor)
This bachelor thesis deals with the development and processing of the device useful for pulling and cutting of dental fiber reinforced composite prepreg. The main goal was the designing, assembling and testing of the device and making of the technical documentation of its all components. Furthermore, the developed apparatus was implemented and tested in the industrial production.
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ML PCB with Microvia - Production Line Design
Libich, Jiří ; Blansko, Jiří Zouhar, ČEMEBO (referee) ; Starý, Jiří (advisor)
This Bachelor thesis deals with the production of Printed Circuit Boards(PCBs), especially of the High Density Interconnection(HDI) type with microconnections. The aim of my thesis is to design and implement an technology equipments for the production of multilayer PCBs, more precisely four-layer PCBs, with the use of modern technology. The design was carried out for the company dealing with the production of PCBs. The Bachelor thesis was done in cooperation with ČEMEBO BLASNKO s.r.o.
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