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Computational simulation of pass rolling
Hacek, Samuel ; Šebek, František (oponent) ; Petruška, Jindřich (vedoucí práce)
This master's thesis reviews possibilities of finite element modelling of pass rolling. Motivation and problem formulation may be found at the beginning of the thesis, followed by definition of system of essential variables. Next chapter describes various methods of rolling as well as the rolling process itself. An emphasis is put mainly on pass roll design. The following part deals with material behavior and its modelling in finite element software Abaqus, which is used in the computational part of the thesis. Multiple models of plasticity are introduced here, as well as damage criteria, used to assess material formability or simulate propagation of ductile damage through the material. Next part is focused on finite element method, specifically its explicit algorithm, later employed in the computational part of the thesis. In the last theoretical chapter, basic principles of photoelasticimetry, a traditional experimental method, are described. These chapters also contain description of simplified finite element analysis and photoplastic experimental analysis of a specific pass rolling problem. Computational model used there served as a basis for the new finite element model, creation of which is the purpose of the following chapter. Two variants of the simplified, previously used computational model were recreated as well. Structural analyses were carried out using the three created models and various results were evaluated. Summary of obtained results and their comparison to original computational and experimental results follows. Discussion of the results and evaluation of usability and reliability of individual computational models form conclusion of the thesis.
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The use of mass scaling within Abaqus explicit code
Hacek, Samuel ; Kubík, Petr (oponent) ; Šebek, František (vedoucí práce)
The purpose of this bachelor’s thesis is to evaluate the usability of the mass scaling function in Abaqus computing environment. The introductory part starts with a description of the explicit formulation of the finite element method, which is followed by a definition of various mass scaling methods and a description of their usability. The practical part of the thesis consists of a few problems solved using aforementioned mass scaling techniques. The course of the solution is focused on the determination of the extent of the influence that the use of various mass scaling techniques has on the obtained data. The last part of the thesis is devoted to evaluation of the applicability of various mass scaling techniques in different situations, considering possible reduction of computing time as well as the reliability of the obtained data.
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Computational simulation of pass rolling
Hacek, Samuel ; Šebek, František (oponent) ; Petruška, Jindřich (vedoucí práce)
This master's thesis reviews possibilities of finite element modelling of pass rolling. Motivation and problem formulation may be found at the beginning of the thesis, followed by definition of system of essential variables. Next chapter describes various methods of rolling as well as the rolling process itself. An emphasis is put mainly on pass roll design. The following part deals with material behavior and its modelling in finite element software Abaqus, which is used in the computational part of the thesis. Multiple models of plasticity are introduced here, as well as damage criteria, used to assess material formability or simulate propagation of ductile damage through the material. Next part is focused on finite element method, specifically its explicit algorithm, later employed in the computational part of the thesis. In the last theoretical chapter, basic principles of photoelasticimetry, a traditional experimental method, are described. These chapters also contain description of simplified finite element analysis and photoplastic experimental analysis of a specific pass rolling problem. Computational model used there served as a basis for the new finite element model, creation of which is the purpose of the following chapter. Two variants of the simplified, previously used computational model were recreated as well. Structural analyses were carried out using the three created models and various results were evaluated. Summary of obtained results and their comparison to original computational and experimental results follows. Discussion of the results and evaluation of usability and reliability of individual computational models form conclusion of the thesis.
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The use of mass scaling within Abaqus explicit code
Hacek, Samuel ; Kubík, Petr (oponent) ; Šebek, František (vedoucí práce)
The purpose of this bachelor’s thesis is to evaluate the usability of the mass scaling function in Abaqus computing environment. The introductory part starts with a description of the explicit formulation of the finite element method, which is followed by a definition of various mass scaling methods and a description of their usability. The practical part of the thesis consists of a few problems solved using aforementioned mass scaling techniques. The course of the solution is focused on the determination of the extent of the influence that the use of various mass scaling techniques has on the obtained data. The last part of the thesis is devoted to evaluation of the applicability of various mass scaling techniques in different situations, considering possible reduction of computing time as well as the reliability of the obtained data.
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