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Spatial materials for additive manufacturing in civil engineering
Říha, Tomáš ; Apeltauer, Tomáš (referee) ; Podroužek, Jan (advisor)
The bachelor thesis deals with additive manufacturing in the construction industry and with materials used in this field. The first part of the thesis defines the 3D printing, briefly describes the history of this progressive technology and gives an overview of the used methods and technologies. The printing methods are divided according to the physical state of the basic material used for printing. The next part of the thesis presents the possible use of additive manufacturing in the construction industry and an overview of realized projects. Finally, at the end of the theoretical part are introduced materials applicable to additive manufacturing in the construction industry and is defined the concept of spatial materials. Spatial materials are a relatively new term, which is not yet in the literature sufficiently defined. These materials can be used for an application in a space where the structure and the position of their particles can be optimized. They can be applied for the creation of 2D filling structures, which are more useful for geometrically simple and simply loaded constructions. It is preferable to use spatial materials to create 3D structures that are designed to fill numerically optimized structures. These structures are based on the principle of double curvature and on a triply-periodic minimum surface (TPMS). In the practical part of the thesis was created the design of building block filled with 3D gyroid structure, designed for prefabrication by using additive manufacturing in the factory or at the site of construction. This proposal reflects the increasing demand for easy individualization of constructions and building elements. Especially, the demand for the creation of structures and shapes which are topologically optimized with a customized appearance and sufficient strength, all at the customer's request.
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Experimental 3D printer for the selective laser sintering of polymers
Kroutil, Tomáš ; Čížek, Petr (referee) ; Paloušek, David (advisor)
The diploma thesis deals with design and realization of experimental 3D printer for selective laser sintering of plastic powders. The output of the work is a device that can create the main process conditions for laser sintering. A diode laser is used in the device, which allows aluminum composite powders to be processed. The printer allows you to heat up the applied layer of powder and set-up space. The research section focuses on similar equipment, process parameters, laser technology and control system. The design section contains solution variants and a description of the chosen solution.
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Desigm of the 3D printer for print material with carbon fibers
Chaloupka, Matyáš ; Kočiš, Petr (referee) ; Pavlík, Jan (advisor)
The presented thesis deals with FDM 3D printing method with emphasis on printing carbon fiber reinforced plastic (CFRP). The aim of this thesis is to engineer the FDM 3D printer designed for printing CFRP and to execute the experiment targeted on comparison of CFRP material properties against commonly used 3D printing plastics such as PLA, ABS, PET etc. The device designed in this work has printing area of 200 x 200 mm with maximum height of the object of 200 mm. The printing bed is heated and the whole device is enclosed. There are two kinds of experiments carried out within the thesis. The first one is focused on tensile strength and Young's modulus of selected materials, while the second experiment compares Charpy's impact strength of specimen with different infill percentage on two selected materials, PET and PET filled with chopped carbon fiber.
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Structural optimization of the heat switch part
Zemek, Albert ; Mašek, Jakub (referee) ; Löffelmann, František (advisor)
This diploma thesis deals with the design of a structure for heat transfer path of miniaturized heat switch. The focus is on production using SLM additive technology. The aim is to assess the possibilities of using metal 3D printing on a part intended primarily for heat transfer. This work presents several concepts of structure arrangement, which are further analysed and evaluated. The results show the potential of additive technologies in this area and the proposed structures meet the heat transfer requirement according to the calculations used.
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Automated design and 3D printing of prototypes for urban engineering
Krutáková, Anna ; Vořechovská, Dita (referee) ; Podroužek, Jan (advisor)
This bachelor thesis deals with automated design and 3D prototype printing for urban engineering. In the first part, there is a general definition of 3D printing, including development and overview of basic technology and materials. It also follows the focus on certain measurement methods and the creation of 3D models. In the second part, the thesis focuses mainly on the use in the building industry and it discusses related topics such as the automatic optimization of the external elements of building elements or objects(shape), the internal topology of these building elements (fill) and the possible inspiration from organic structures. There is also distinguished between terrestrial applications focusing on the production of prefabricated building components and implementation at site. Extraterrestrial autonomous applications discuss the possibilities this technology for colonizing the Moon or Mars. This thesis presents the results of a unique assessment of the current state of the art in the field of applicability of 3D technology for additive production in the context of urban engineering and demonstrates the associated advantages and open problems on many examples. Finally, the benefits of this technology are evaluated.
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Determination of Material Properties of Specimens Produced by Metallic 3D Printing
Zakl, Alexandr ; Peterková, Eva (referee) ; Řiháček, Jan (advisor)
This bachelor's thesis deals with mechanical properties and current status of 3D printing of metal parts, especially by DMLS/SLM method. Research part is dedicated to various technologies and suppliers in the field of 3D printing with emphasis on printing metal methods. Main purpose of this thesis is to connect the worlds of 3D printing and 3D optical measuring of deformation, so the part of research segment is dedicated to optical measuring and leading innovative company GOM. One of the leading product of this company is ARAMIS and in the context of this thesis it was present during the experiment as a instrument for measuring and inspecting material characteristics, and is present in research part where is mentioned a principle on which this device is working (digital image correlation) as is the device itsself. In the experimental part of this thesis, samples were printed on DMLS printer from company XactMetal, which were then submitted to a tensile test. Measurement was done using DIC based device ARAMIS and inspected for basic material properties in same named program.
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Industry 4.0 in according Design and Application of Production Machines
Serykh, Pavel ; Szabari, Mikuláš (referee) ; Knoflíček, Radek (advisor)
This Bachelor thesis is focused on the theme of CNC manufacturing machines and their use in accordance with the principles of Industry 4.0. The first part is a search of the current state in the field of the most frequently used CNC production machines in engineering according to their design and application. In the second part described principles, basic attributes and key technologies of Industry 4.0, defined concept. The last part is on top of the project conceptual workplace with CNC manufacturing machines in the premises of the technical high school VUTBR in accordance with the principles and tenets of Industry 4.0 and the evaluation of the results achieved.
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Mechanical-structural characteristics of multi-materials prepared by additive technologies
Hyspecký, Michal ; Válka, Libor (referee) ; Pantělejev, Libor (advisor)
The diploma thesis deals with the mechanical-structural characteristics of the multimaterial interface prepared by the additive cold-spray (CS) technology. In the experimental part of the work, the titanium alloy Grade 23 was applied to the surface of aluminum alloy EN AW 2618, after heat treatment T6. Furthermore, a separate bulky block made of Grade 23 alloys for the production of tensile bodies was created using the CS method. The sprays were evaluated in two planes perpendicular to each other, respectively in longitudinal and transverse section. The average porosity of the coatings was evaluated at 2,6 ± 0,6%. The hardness value at low load did not change significantly with increasing distance from the interface and the mean value was 347 ± 51 HV 0,3. The tensile test did not show a significant effect of the sample orientation on the resulting value of the yield strength, which had the diameter of 345 ± 12 MPa. Successful deposition takes place at the temperature of 1010 ° C and the pressure of 5 MPa. The achieved results of the mechanical properties of the coating determined on the basis of tensile tests are at a relatively good level. Therefore, it is possible to consider the use of coating by this method, under given conditions, for rotating components operating at elevated temperatures, and increase their efficiency or service life.
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