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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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Material nonlinear solution of structures made of plastics
Weis, Lukáš ; Krejsa,, Martin (referee) ; Králík,, Juraj (referee) ; Kytýr, Jiří (referee) ; Němec, Ivan (advisor)
The presented thesis focuses on static analysis of plastic structures, taking into account nonlinear behaviour of the material depending on the stress. The static analysis is performed using the finite element method. The difference between material linear and material nonlinear approach is illustratively described in the introduction. A shell finite element, which is enhanced by the possibility of further delamination into layers and integration points along its thickness, is suitable to be used for a numerical analysis of a plastic structures. Separate chapters are devoted to the integration of the resulting values over the height of the cross-section. The integration of the material stiffness matrix correctly reflects the emergence of eccentricity. A part of the attention is devoted to the numerical quadrature rules. Next chapter is devoted to material nonlinear models. Two approaches are described: a simpler one, using the isotropic nonlinear elastic model, and more general one, using the orthotropic plastic model. The theoretical description is complemented by the graphic interpretation of the criteria according to the individual authors. A significant portion of this work is devoted to the algorithmization of calculation procedures described in the theoretical chapters. The algorithmization itself is implemented in Fortran language into a dynamic-link library which is part of the software program RFEM 5 which is widely used in engineering practice. A part of the work is a study comparing the performance of the different technologies applicable for the algorithmization of the described issues. The agreement of the theoretical analysis of the material models and subsequent implementation within the RFEM 5 is demonstrated on the example of the bent cantilever. The thermoplastic aboveground tank structure is subject of detailed material linear, and nonlinear analysis respectively. The various approaches are compared on the results of stress, deformation an
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Static analysis of one joint of timber structure
Sedlák, Petr ; Gratza, Roman (referee) ; Kytýr, Jiří (advisor)
This diploma thesis deals with the numerical modeling of the nail joint of the timber roof structure and it is based on the already realized physical experiment. Totally twelve various solutions, where the isotropic and ortotropic characteristics of the spruce timber and steel components change, have been created. The final values of the joint shift obtained by using of the numerical modeling are compared with results of physical experiment. Program system ANSYS is used.
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Static Solution of Water Pipes in Trenchless Technology
Mráčková, Martina ; Kytýr, Jiří (referee) ; Gratza, Roman (advisor)
The paper provides an overview of the most widely used trenchless technologies and the possibility of their utilization for laying new thermoplastic pipelines. It analyzes the static behavior of thermoplastic water pipes placed into the existing steel pipes using relining technology. The program system ANSYS is used as a tool for static solution of pipelines. Obtained results are compared with conventional approaches.
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Static Analysis of Structural Elements of Glass
Hořký, Radek ; Gratza, Roman (referee) ; Kytýr, Jiří (advisor)
They analyzed the various factors affecting the design or evaluation of structural glass. Within evaluation of structural glass element is checked selected concepts of linear elastic fracture mechanics. For modeling is used programme system ANSYS based finite element method. The results are compared with the analytical solution.
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Structural Analysis of Steel Members in Fire
Runštuková, Monika ; Kytýr, Jiří (referee) ; Gratza, Roman (advisor)
This thesis deals with solution of steel members under fire conditions. The goal of the thesis is to examine and compare unprotected steel members with steel members protected by different types of passive protection. Calculation is performed according to applicable design standards. ANSYS software is used for thermal and structural analysis.
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Static Analysis of the Parts of the Textile Structures
Husáriková, Natália ; Gratza, Roman (referee) ; Kytýr, Jiří (advisor)
Bachelor thesis deals with elastic modulus determination by experimental measurements and comparison with the manufacturer's declared values. Own methodology for measuring membrane strip is proposed in this thesis. Thus determined values of elastic modulus are used in analysis models using ANSYS software. Calculated values of displacements are compared with the manually measured values of displacements during the experiment. Membrane strip with a hole is modeled in the same way.
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Static analysis of cable
Folvarčná, Ingrid ; Kytýr, Jiří (referee) ; Vlk, Zbyněk (advisor)
Subject of this thesis is to design the supporting rope of suspension bridge for pedestrians. The aim propose is the initial geometric shape of the rope and the rope load impressed upon the desired shape. The proposal will be carried out by hand calculation, which will be compared with the calculation in computing RFEM. To illustrate the behavior of the rope, the load will be carried out, but the rope will no longer be considered to limit states.
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Static analysis of the timber roof structure
Sedlák, Petr ; Gratza, Roman (referee) ; Kytýr, Jiří (advisor)
This thesis with the numerical modeling and assessment has been carried timber roof structure of the gymnasium hall of the elementary school TGM at Bílovec. The study was realized in program system ANSYS. They are created a variety 2D and 3D numerical models which are assessed according to current normative regulations.
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