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Analysis of mechanical properties of composite materials printed by additive 3D printing technology
Mudrák, Michal ; Joska, Zdeněk (referee) ; Sedlák, Josef (advisor)
This thesis deals with the analysis of mechanical properties of composite materials used for 3D printing by Markforged company. The theoretical part is focused on the characterization of composite materials and analysis of mechanical tests. The experimental part deals with the production of test specimens for specific mechanical tests (tensile test, Shore D hardness test and bending test). The test sapples with Onyx base material are individually reinforced with carbon and high-temperature glass fibers (HSHT). There are statistically evaluated selected parameters for individual mechanical tests (tensile strength, elongation, modulus of elasticity, Shore D hardness, bending stress and bending deformation). The thesisis completed by comparing selected parameters of composite materials with overall recommendations for users.
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The study of the effect of additive manufacturing technology parameters Selective Laser Melting properties of the produced object
Žabka, Marek ; Koukal, Ondřej (referee) ; Vrána, Radek (advisor)
Metal additive technology currently finds use in a large number of industrial sectors. Mainly in domains such as aviation, medicine and astronautics, the emphasis is laid on mechanical and material properties of materials. This bachelor thesis deals with the research study of process parameters of technology Selective Laser Melting for material AlSi10Mg and stainless steel 316L. In thesis the impact analysis of main process parameters: laser power, scanning speed, hatch distance, layer thickness, especially on the porosity of the samples was carried out. Recommended settings for both materials were found based on the research of the current state. It was further found out the influence of parameters such as powder humidity or laser scan strategy.
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Gears created by 3D printing for consumer use
Chládek, Vilém ; Sedlák, Josef (referee) ; Kalivoda, Milan (advisor)
This bachelor thesis deals with gears and subsequently with 3D print. 3D print is nowadays a rapidly evolving technology which can solve complex assemblies. This text contains gears analysis and their parameters. The next section describes 3D printing technologies and the materials used. The main point of the solution is elaboration of the 3D model of a hand-powered drill and its subsequent 3D print. With this is discussed, the issue of fitting, model assembly and post-processing. A successfully printed and functional drill can be then used for educational purposes or as a suitable pattern for the kit.
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Analysis of Dimensional Accuracy and Mechanical Properties of Plastic Components Made by 3D Printing
Horák, Ondřej ; Joska, Zdeněk (referee) ; Sedlák, Josef (advisor)
The Master's thesis deals with the determination of mechanical properties of materials used for 3D printing by ALPS ELECTRIC CZECH, s.r.o. (PETG, PLA, ABS, PLA ESD), extended of new materials (ASA, PC / ABS). The prepared test samples, produced by 3D printing technology Fused Deposition Modeling, were analyzed using mechanical tests (tensile test and two hardness tests), surface roughness and dimensional accuracy. Statistical evaluation was performed for individual materials of selected parameters (tensile strength, modulus of elasticity in tension, elongation, Shore hardness, hardness of ball indentation). The conclusion of the thesis is devoted to the comparison of materials by selected parameters and production costs. The additive material PLA Filament Plasty Mladeč proved to be the best with its properties and the second lowest price.
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The Use of Additive Technology for Manufacturing Components of the Sample
Vrbická, Eliška ; Sedlák, Josef (referee) ; Kalivoda, Milan (advisor)
Thesis deals with the use of additive manufacturing technologies for the production of sample components. These are mainly using method Fused Deposition Modeling (FDM). The production was used to 3D printer for based on this principle. Manufactured subject has own design of pendant, this pendant has shape of blooming flower with leaf. The model was created in SolidWokrs 2013. This model is further elaborated in the program CatalystEX. Thus originated data for the printer Dimension uPrint. Once printing is complete and upon dissolution the of aid were removed imperfections printing. Thus-to-terminated object can be used as a garnish.
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Design of pedal system for Pneumobil race car using topology optimisation
Pchálek, Václav ; Červinek, Ondřej (referee) ; Vaverka, Ondřej (advisor)
This thesis deals with design of pedal assembly of pneumobile racing car to increase its rigidity and reduce its weight. Based on the search, the kinematics of pedal was changed due to more precise determination of pedal ratio. Topology optimization and lattice structure were used to achieve the goals. The results were checked by strength analysis using finite element method. To produce topologically optimized parts use of metal additive technology is assumed, for which the parts have been further modified. Deformation was reduced by 13,4 % for the brake pedal and by 96,8 % for the accelerator pedal. The weight of the pedal system has been reduced by 31 %. This pedal assembly design could be an alternative to the current pedal assembly, as it is lighter and meets the requirements for higher rigidity.
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Application of Metal Additive Technology in Production of a Blisk for Turbine Engine of a Auxiliary Power Unit
Robl, Jan ; Ňuksa, Petr (referee) ; Sedlák, Josef (advisor)
The thesis deals with the possible use of additive technology in the production of strong thermally exposed components of turbine engines. The first part of the thesis is dedicated to the issue of processing heat-resistant materials by SLM method, introduction of conventional production of selected part and outline of currently used progressive methods in precision casting technology. These theoretical findings are further applied in the practical part of the thesis, which deals with the analysis of mechanical properties of cast and printed material IN 939. Experimental part also includes production of the blisk of the first stage turbine of the auxiliary power unit S5L by SLM additive technology. The thesis also includes analysis of fracture surfaces and metallographic analysis of samples using light and scanning electron microscopy. The thesis ends with the evaluation of the achieved results.
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Contactless sealing element
Bryksí, Petr ; Navrátil, Václav (referee) ; Omasta, Milan (advisor)
This bachelor's thesis deals with the design of a labyrinth seal element for a tram gearbox. The element should create the most effective seal in the smallest possible space. The work contains a research part dealing with the possibilities of shaft sealing and applicable 3D printing technology. The second part deals with the analysis of the current solution of tram gearbox seals. The construction part deals with the design of the most suitable material and shape to create the greatest resistance, against the ingress of dirt into the gearbox. The result of the work is a model ready for 3D printing and subsequent application, for testing in operating conditions.
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Usage of Modern Technologies for the Design of the Production of Push up Stands
Remer, Tomáš ; Kouřil, Karel (referee) ; Sedlák, Josef (advisor)
This bachelor thesis is focused on the design of the design of push up stands, which are made using the additive Rapid Prototyping technology. The manual beam design is developed in CAD systems, specifically in the Autodesk Inventor parameter set. The model of these beams is made on Fortus 450 mc, which uses Fused Deposition Modeling. The thesis also includes the characteristics of Rapid Prototyping, along with the evaluation of the most used materials and methods. The end of the thesis is completed by the technical-economical evaluation of push up stands, including comparison of the costs of implementation with other organizations.
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Implementation of a function sample by the 3D printing technology
Kovařík, Martin ; Zemčík, Oskar (referee) ; Osička, Karel (advisor)
The diploma thesis deals with the analysis of the technological possibilities of existing 3D printers, which fall under the general concept of rapid prototyping. Furthermore, the work contains an analysis of the materials used based on plastics and an alternative to 3D printing from metal powders. The main goal of the work is the production of two functional samples and the design of their components for the experiment from three different materials. Specifically, it is about making a holder for a smart mobile phone of normal dimensions in an alternative for a car and in a version for office use. The parts were printed using FDM (Fusion Deposition Modeling) technology, using the three most available and common materials (so-called filaments) that this method uses, namely PLA, ABS and PET-G. As a result of the work, there are also proposals for functional testing methodologies with a focus on product life and technical-economic evaluation, thanks to which it is possible to determine which of the materials is most suitable for 3D printing of the mentioned samples.
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