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Computational simulation of cross-roll leveling of rods
Benešovský, Marek ; Vrbka, Jan (referee) ; Petruška, Jindřich (advisor)
Final thesis describes two variants of computational models to simulate cross-roll leveling of rods, which are based on the Lagrangian approach to describe the continuum. Implementation of both variants was performed in ANSYS software, and their main difference lies in the choice of the type of elements for the discretization. An integral part of this thesis is the description of the principle, which is an evaluation of the curvature of the rod after completion of the simulation leveling. In the other part of the work are presented the results, which are then compared with realized experiment and simulation algorithm for cross-roll leveling based on the Euler approach. The final part is dedicated to the optimal settings of the leveller.
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Analysis of the mechanical properties of plastic parts realized by 3D printing
Krejbychová, Adéla ; Benešovský, Marek (referee) ; Vosynek, Petr (advisor)
This bachelor thesis deals with the analysis of mechanical quantities of PET-G samples which were created by using 3D printing. The problem was solved experimentally. The samples were printed by using the FDM technology (Fused Deposition Modeling). Mechanical properties were measured by the tensile test and the measured quantities were further analyzed statistically. The influence of the pigment, the material manufacturer and the effect of setting the process parameters on the actual construction of the samples were investigated. On the basis of the carried out analyses it was discovered that the samples printed horizontally in the XY plane with a 45° / -45° fill angle from Devil Design had the best mechanical properties.
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Evaluation of risk of buckling in bimaterial columns
Benešovský, Marek ; Návrat, Tomáš (referee) ; Burša, Jiří (advisor)
Bachelor’s thesis contains the principle of determining the critical load of buckling of column with nonconstant parameters. There is a solution for the column composed of one and two materials and solutions for the column with two different cross-sections. An essential part of this work is the numerical solution, which is used for solving nonlinear equations in implicit form. In this work, these equations occur when solving columns of two materials and two different cross-sections. For the numerical solution, it is necessary to set an initial approximation. Initial aproximation and numerical solution are solved by a program, which was created for this work. In the final part, are stated several graphs. The most important graph represents relation of the ratio of approximate critical load obtained by interpolation of Euler's relation and critical load gained numerically on the ratio of Young’s modules of both materials.
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Determination of geometric characteristics of curved beam
Foukal, Jakub ; Houfek, Martin (referee) ; Benešovský, Marek (advisor)
This bachelor thesis focuses on creating a algorithm for determining geometric characteristics of curved beam. In the first part, formulas are taken from technical literature. These formulas are then modified and used for implementation of algorithms. In the following section, there are two algorithms for determining the curvature of a curved beam and comparison between their calculated values. The concluding part focuses on an algorithm for calculating the cross-section characteristics from random image format. The algorithm of cross-section characteristics is analytically verified.
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Determination of geometric characteristics of curved beam
Foukal, Jakub ; Houfek, Martin (referee) ; Benešovský, Marek (advisor)
This bachelor thesis focuses on creating a algorithm for determining geometric characteristics of curved beam. In the first part, formulas are taken from technical literature. These formulas are then modified and used for implementation of algorithms. In the following section, there are two algorithms for determining the curvature of a curved beam and comparison between their calculated values. The concluding part focuses on an algorithm for calculating the cross-section characteristics from random image format. The algorithm of cross-section characteristics is analytically verified.
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Analysis of the mechanical properties of plastic parts realized by 3D printing
Krejbychová, Adéla ; Benešovský, Marek (referee) ; Vosynek, Petr (advisor)
This bachelor thesis deals with the analysis of mechanical quantities of PET-G samples which were created by using 3D printing. The problem was solved experimentally. The samples were printed by using the FDM technology (Fused Deposition Modeling). Mechanical properties were measured by the tensile test and the measured quantities were further analyzed statistically. The influence of the pigment, the material manufacturer and the effect of setting the process parameters on the actual construction of the samples were investigated. On the basis of the carried out analyses it was discovered that the samples printed horizontally in the XY plane with a 45° / -45° fill angle from Devil Design had the best mechanical properties.
|
|
|
Computational simulation of cross-roll leveling of rods
Benešovský, Marek ; Vrbka, Jan (referee) ; Petruška, Jindřich (advisor)
Final thesis describes two variants of computational models to simulate cross-roll leveling of rods, which are based on the Lagrangian approach to describe the continuum. Implementation of both variants was performed in ANSYS software, and their main difference lies in the choice of the type of elements for the discretization. An integral part of this thesis is the description of the principle, which is an evaluation of the curvature of the rod after completion of the simulation leveling. In the other part of the work are presented the results, which are then compared with realized experiment and simulation algorithm for cross-roll leveling based on the Euler approach. The final part is dedicated to the optimal settings of the leveller.
|
|
|
Evaluation of risk of buckling in bimaterial columns
Benešovský, Marek ; Návrat, Tomáš (referee) ; Burša, Jiří (advisor)
Bachelor’s thesis contains the principle of determining the critical load of buckling of column with nonconstant parameters. There is a solution for the column composed of one and two materials and solutions for the column with two different cross-sections. An essential part of this work is the numerical solution, which is used for solving nonlinear equations in implicit form. In this work, these equations occur when solving columns of two materials and two different cross-sections. For the numerical solution, it is necessary to set an initial approximation. Initial aproximation and numerical solution are solved by a program, which was created for this work. In the final part, are stated several graphs. The most important graph represents relation of the ratio of approximate critical load obtained by interpolation of Euler's relation and critical load gained numerically on the ratio of Young’s modules of both materials.
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