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Analysis of welded joints using Finite Element Method
Štěrba, Martin ; Kala, Jiří (referee) ; Hradil, Petr (advisor)
This diploma thesis is concerned with the numerical analysis of welded aluminim structures. In these structures, there are significant decreases in the mechanical properties at the area of the weld and in the heat affected zone as a result of welding. Within this thesis, simulations of quasi-statically loaded welded joints made from EN AW-6082 T6 alloy were performed to investigate the load capacity and ductility of these joints. Computations were performed using a programme system based on an explicit finite element method. To describe material anisotrophy, a nonlinear material model called the Weak texture model was chosen. Material properties of the weld and the heat affected zone were considered to be different from base material. The required material parameters were adopted from available literature, however, material tests and indetification procedure of these parameters were described. In comparison with the experimental data, the results of the numerical simulations showed a relatively good ability of models to capture load capacity of studied welded joints. Nevertheless, due to mesh sensitivity of models caused by localization of deformation, it was not possible to determine ductility of these joints.
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Static Analysis of Steel Joints
Vojtek, Jiří ; Kytýr, Jiří (referee) ; Gratza, Roman (advisor)
Elaboration of design principles of steel joints. Creation of the finite element model in ANSYS program, the study of static behaviour near the bolt hole, deformation of the screw and the stress components of the welded joint. Comparison with the analytical formulas.
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Defects and their causes in dyeing of anodized surfaces
Šulc, František ; Žák, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
This thesis deals with the anodic oxidation of aluminum and its alloys. The work consists of two parts. The first one is focused on more detail description of anodic oxidation process itself and theoretical description of the technological process anodic oxidation. The second part is more practically oriented. It compares two different lines for anodizing, and examines factors that affect the final appearance of the surface layer during anodizing welded joints.
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Steel Structure of a Shopping Centre
Pokorná, Martina ; Ing. Milan Šmak. Ph.D. (referee) ; Bajer, Miroslav (advisor)
The load-carrying steel structure of the shopping centre is proposed in two versions. The more advantageous version is elaborated in detail. The roof structure is designed using three-dimensional curved trusses with glass roofing and the structure rests on steel columns. The ground plan dimensions of the steel structure are 120 by 73 meters.
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Roof structure of terminal building
Matouš, Petr ; Bukovská, Pavla (referee) ; Röder, Václav (advisor)
The supporting structure of the roof of terminal building is designed as a combination of trusses glued laminated timber, purlins and columns of solid wood and steel poles supports and rods. Truss is mounted on steel columns and supported by steel lattice structures and wooden pillars.
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