|
|
Design of a portable machine for machining large diameter pipes
Boháč, Josef ; Pavlík, Jan (referee) ; Tůma, Jiří (advisor)
This diploma thesis deals with the design of a portable machine for machining large diameter pipes. This thesis is divided into research, calculation, design, and construction parts. The introductory part is devoted to research in the field of joining large diameter pipes, with a focus on flanged and welded joints. Based on the findings from the research part, several construction solutions were considered. In the next part, the most suitable design solution was selected using a multicriteria analysis technique and subsequently elaborated on in detail. The following chapter deals with the calculation of maximal cutting forces and the selection of motor. An air motor was chosen as the most suitable option for the proposed machine. This part is followed by the computational part, which includes strength calculations for the critical parts of the machine. The final part of the thesis is devoted to the construction itself and the description of the individual construction nodes of the machine. The thesis also includes a 3D model, drawings of selected parts, and an assembly drawing.
|
|
|
Analysis of welded joints after fatigue tests
Kučera, Ondřej ; Doubrava, Marek (referee) ; Havlík, Petr (advisor)
This bachelor thesis deals with analysis of welded joints after fatigue tests . The first part of this thesis, literary research, discusses weldability of carbon steels and low-alloy steels and effect of chemical composition on weldability of materials. Further there are zones of welded joints, their microstructure and mechanisms applied described in this thesis. There are defects occurring in welded joints and their common causes and remedies described in the part of literary research dealing with defects. And the final part of the literary research deals with material fatigue, fatigue of welded joints and effect of defects, fusion zone and heat-affected zone on the fatigue of welded joints. In the experimetal part of bachelor thesis there is described experimental material, results obtain process and discussion of results.
|
|
|
Microstructure stability of electron beam welds
Rončák, Ján ; Havlík, Petr (referee) ; Jan, Vít (advisor)
The aim of this bachelor thesis is an evaluation of microstructure and functionality of welded joints by using methods of material engineering. At first, there are various methods of welding described in the theoretical part. In the second part, the thesis introduces every material that is used to create a welded joint. The final part then offers an explanation of every method used to analyse the process of welding. The joints were created on two specimens without any filler material and at the machine that uses electron beam. The first joint is a combination of austenitic hadfield steel with ferrite-perlite carbon steel and in the second case combined with stainless ferritic steel with high amount of chromium.
|
|
|
Electron beam welding of parts made from aluminium alloy
Jirák, David ; Jakoubek, Jaroslav (referee) ; Daněk, Ladislav (advisor)
The topic of this thesis was ordered by Valeo Compressor Humpolec Itd (further referred to as Valeo). It deals with the electron welding of a component made of an aluminium alloy, a piston specifically, which is made for an automobile air-conditioning compressor. The aim of this thesis was to analyze and suggest a way of increasing porosity of the welded area. The data needed for the analysis and the present state of the welded area was provided by Valeo.
|
|
|
Lifetime Prediction of the Welded Ribbed Generator Shaft
Ryšánek, Michal ; Pokorný, Pavel (referee) ; Majer, Zdeněk (advisor)
This master thesis deals primarily with the prediction of fatigue life of welded ribbed shaft. Recommendations taken from the International Institute of Welding (IIW) are used to express the stress values and the fatigue life. The stress values of examined place are expressed by approach of nominal stress, structural hot spot stress and effective notch stress. Results from stress-strain analysis are combined together with fatigue strength curves for prediction of the fatigue life. At the end of the analysis, the predicted fatigue life is compared with design life of welded ribbed shaft.
|
|
|
Watchtower in Brno Kohoutovice
Komárek, Ondřej ; Bajer, Miroslav (referee) ; Barnat, Jan (advisor)
The main aim of my master´s thesis was to design a load-bearing steel structure of the lookout tower situated in Brno-Kohoutovice. The height of the load-bearing structure is 35.5 m. My design comprises two different engineering solutions. Solution A is a lattice space frame whereas Solution B works with continuous columns with vertical bracing. For further development, Solution A has been chosen. The proposed structural material is the S355 steel. My thesis includes an engineering report, a statics analysis and drawing documentation.
|
|
|
Non-destructive methods of control of welded joints
Černický, Martin ; Šlais, Miroslav (referee) ; Dohnal, Ivo (advisor)
The thesis elaborated in frame of bachelor studies branch mechanical engineering. The thesis is submitting research of present methods of non-destructive control of welded joints. Pursuant to of the literary pursuit the present methods of control of welded joints were written. First it mentioned problematics of defect of welded joints. After it is mentioned a summary of principles and application of methods of non-destructive control of welded joints.
|
|
|
Bridge crossing over Svitava river and railway track in Blansko
Smělíková, Petra ; Konečný, Vojtěch (referee) ; Křižan, Lukáš (advisor)
The aim of the Diploma Thesis is elaboration of study of bridge crossing over the Svitava river and ČD railway track in Blansko. It concerns a five-pole steel beam road bridge with through-span which carries road of the third category. The static system of the construction is solved as solid-web beam of 1.3 meters height which is in three middle spans reinforced by truss construction with top chord and system of diagonals without verticals. The height of the main beam where reinforced by trusswork is 4.75 meters. The width of spans in the road axis is 18.5 + 30.525 + 44.4 + 30.525 + 18,5 metres. The bridge deck consists of steel cross beams bonded with reinforced concrete slab of 200 millimeters of thickness. The drive-through width of the roadway is 7.0 meters. The bridge is fitted with right-sided walkway placed on steel cantilevers. The walk-through width of the walkway is 3.0 meters. Material used is S355 Steel, C30/37 Concrete and S460 Steel which is used for marginal spans of the bridge. Load-bearing construction is assessed in compliance with current technical requirements laid down by European Directives, so called “Eurocodes”. The calculation of inner powers is performed using the Scia Engineer 2013.1 software.
|
|
|
Building of Centre of Livestock Production
Vidová, Miriama ; Barnat, Jan (referee) ; Pilgr, Milan (advisor)
My diploma theisis is focused on design and assessment of structural systém of industrial building in tended for livestock farming. The design is processed in two options. Both oft hem has the same dimensions but cross sections of the supporting elements are changed. Floor plan of the first part is a rectangular shape, dimension is 29,28 m x 24,8 m. Floor plan of the second part is a rectangular shape, dimension is 161,18 m x 46,8 m. Slope of saddle roof is 18°.
|
|
|
Multi-purpose sports building
Šandor, Peter ; Štrba, Michal (referee) ; Pilgr, Milan (advisor)
The goal of my thesis is the design of a multipurpose sport hall in Litoměřice locality made in two separate variants. Objects ground plan dimensions are 38x38 meters and the height of the object is 16 meters. Used material is S235 steel and C20/25 concrete. The periphery and roof casing of the object is realized from sandwich panels. The carrying construction of the object is made from cross truss, oblong truss and from pillars. Thesis consists of assessing the carrying elements of the construction, selected details and drawing documentation.
|
guest ::
