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Porosity during welding aluminous alloys
Hájková, Alena ; Daněk, Ladislav (referee) ; Sigmund, Marian (advisor)
This thesis deals with the problem of occurrence of porosity in aluminous alloys and the methods of their repair in the company IFE. Theoretical part is aimed on the current state of porosity and the ways in which the be pores can be repaired. Used technologies of repairs are TIG welding and cementing. The practical part consists of experiment in which is used a method of cementing on specific part.
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Residential building
Šeps, Daniel ; Bartlová, Jana (referee) ; Vajkay, František (advisor)
The subject of the bachelor thesis is the design of a new building of a detached apartment building in Nová Paka in the form of project documentation for construction. The buiding is designed brick with reinforced concrete ceilings. Perimeter walls on the 1st – 3rd floor is designed ceramic brick blocks th. 300 mm with contact thermal insulation system ETICS th. 200mm, which will be equipped with silicone plaster 1,5mm. Perimeter walls on the underground floor is designed permanent shuttering DITTON 30 th. 300mm, filled with concrete C20/25 XC1 and by steel B500B insulated with extruded polystyrene XPS th. 160mm. Internal load-bearing masonry wall is designed with acoustic ceramic brick blocks th. 250 mm. Partitions are designed from acoustic partition walls. On the ceilings is a hardwood flooring because of excellent acoustic characteristics. The roof is designed as a flat green roof with extensive vegetation and with thermal isolation of minera wool and with waterproofing layer made of bituminous modified SBS strips laid in two layers. Balcony railing is designed aluminous with safety glass paneling.
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Roof structure of construction for social purposes
Bašista, Ján ; Melcher, Jindřich (referee) ; Karmazínová, Marcela (advisor)
The work treats the static recalculation of an existing roof structure of a construction for social purposes and proposes two variants of the design of a new roof structure. The construction has a rectangular ground plan of 30 m x 47 m and the roof structure is placed on the load bearing circumference concrete walls. Except for the load constituted by the function of the construction and by the climatic area, an extra load of 2 tons suspended at any place of the structure is considered because of the special requirement of working and technological equipment. The variant no. 1 is designed from the steel S355. The variant no. 2 is designed as a combination of the wood GL24h and the aluminium EN-AW 5083. Both of the variants have 11 transverse load bearing girders. The purlins are perpendicular to the girders and are placed on them. Stiffness is secured by roof stiffeners.
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Structual welding of aluminium alloy
Blahák, Petr ; Hála, Michal (referee) ; Kubíček, Jaroslav (advisor)
The project elaborated in frame of engineering studies branch 2303R002 presents a project that contains welding a structure made of aluminium alloy. There were two usable methods selected, based on literal study of welding aluminium alloys, TIG welding and friction welding, and these were compared with alternative methods of joining, hard soldering and bonding. A work procedure was made for TIG method, soldering and bonding and four experimental joins were made thereafter. Project compares these methods mainly in economical way, also in way of technological difficulties and in way of observance the strength of base materials. Project also deals with problems with lowering strength of base material in heat affected area, burn out of thin material, tendency of aluminium to fill with hydrogen, quick oxidation and consequent hard surface layer emerging on the aluminium.
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Modern Materials for Automotive Industry
Vaníček, Jan ; Fojtášek, Jan (referee) ; Hejtmánek, Petr (advisor)
This work is focused on the description of conventional and unconventional materials that are used to build a car. Individual types of materials are sorted according to their application and characterized in terms of properties and real use. The end of each chapter is devoted to possible future trends.
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Housing for seniors
Vrbický, Josef ; Donaťák, Vladislav (referee) ; Donaťáková, Dagmar (advisor)
The subject of the diploma thesis is the design of a new building of a free-standing building for housing for the elderly, in the form of project documentation for the construction. The building is designed brick with monolithic reinforced concrete ceilings. Perimeter masonry is designed from ceramic brick blocks th. 300 mm supplemented by contact insulation system ETICS th. 200 mm, which will be provided with silicone plaster with a grain size of 1.5 mm. The internal load-bearing masonry is designed from acoustic ceramic brick blocks of thickness 250 and 300 mm. The partitions are designed from acoustic partitions. The ceilings are designed with a heavy floating floor with excellent acoustic properties. The roof above the two-storey part is designed as a single-skin flat with extensive greenery. Above the three-storey part is a hipped roof made of lattice trusses and sheet metal roofing. The windows are designed with plastic insulating triple glazing. The balcony railing is designed for aluminum with safety glass filling. The building is heated by a gas boiler and controlled ventilation is designed throughout the building using a central recuperation.
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Apartment house
Vrbický, Josef ; Donaťák, Vladislav (referee) ; Donaťáková, Dagmar (advisor)
The subject of the bachelor thesis is the design of a new building of a detached apartment building in Holice, in the form of project documentation for construction. The building is designed with bricks and ceilings made of beams and ceramic inserts. The peripheral masonry is designed from ceramic brick blocks th. 300 mm completed with contact insulation system ETICS th. 200 mm, which will be equipped with silicone plaster 1,5mm. The internal load-bearing masonry is designed from acoustic ceramic brick blocks th. 250 and 300 mm. Partitions are designed from acoustic partition walls. On the ceilings, a heavy floating floor with excellent acoustic properties is designed. The roof is designed flat single-skin with thermal insulation of mineral wool and with waterproofing layer made of bitumen modified SBS strips laid in two layers. Balcony railing is designed aluminum with safety glass paneling.
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Nanocomposites with a metal matrix
Chlupová, Monika ; Kohout, Jan (referee) ; Zapletal, Josef (advisor)
This baechelor thesis is focused on metal matrix nanocomposites (MMNCs), whose research has started recently. In the first part of this thesis are generally defined composite materials, the larger part is dedicated to metal matrix composites (MMCs), on which are described the strengthening mechanisms that are also applied to MMNCs. The second part of the thesis is focused specifically on MMNCs. The concept of MMNCs and their distribution is defined first, followed by a definition of the reinforcement that can be used for the production of MMNCs. There are also described the posibilities for the production of these reinforcing phases, and their influence on the structural and mechanical properties of the final MMNCs. This section is followed by a description of possible processes of MMNCs production with their advantages and limitations. The last part outlines how research and development of these materials should be carried out in order to be commercially produced and used in the future.
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Reasons for pin holes formation in ductile iron castings
Opačitý, Radim ; Palán, Petr (referee) ; Šenberger, Jaroslav (advisor)
The aim of this thesis was to analyze the formation of defects in a given casting of ductile cast iron EN - GJS - 600-3 cast in sand molds bentonite, which is formed jolting with coining and then find a solution to remedy these defects. To resolve this issue, the influence of the composition of the sand mixture, the effect of metal flow in a cavity forms and the influence of deoxidation of metal in the presence of defects. Obtained results showed the importance of the influence Reoxidation metal cavity mold. Specifically, in this case succeeded in reducing the incidence of PINHOLES. Removal of PINHOLES to achieve deoxidation aluminum melt. This has reduced the production of nonconforming castings under 3% from the original 6.5%.
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