|
|
Design and assessment of the timber dome
Hušek, Martin ; Zídek, Rostislav (referee) ; Brdečko, Luděk (advisor)
The subject of the bachelor thesis is design and assessment of the timber dome. The opening chapters are devoted to design geometry of dome itself with focus on its modification for the purpose of the shape and structure optimizing. The following chapters describe the structural design details and overall attitude to the issue. The final chapters value custom design structures, compare alternatives and provide answers to questions formed in the thesis.
|
|
|
Design of mold for plastic injection with hot inflow system
Okurka, David ; Kandus, Bohumil (referee) ; Hušek, Martin (advisor)
This thesis describes a design of an injection mould for plastic part "Sleeve", that is intended for guiding of sliding door hardware. The part is manufactured from PE-HD, production quantity is 3 000 000 pcs annually. Based on calculations and review of specialized literature the design utilizes hot runners of MH system by Ewicon. The tool is assembled from normalized components by Hasco and an injection press BOY22D was suggested for parts production. Total costs for production of 1 part are 0,26 CZK.
|
|
|
Study of joints of frame steel structures
Cikánek, Ondřej ; Hušek, Martin (referee) ; Zídek, Rostislav (advisor)
Master's thesis „Study of joints of frame steel structures“ examine certain analysis types of frame steal joints, which are analysed both by component method and by specialized software IDEA RS. Obtained results are compared by both methods, in terms of load-bearing capacity and in terms of stiffness. Theoretical joints stiffness calculation according to standard ČSN EN 1993-1-8 is included in the introductory part of the thesis. In the second part, joints are designed to bear inner forces and moments, which were created by load combination effects and then analysed.
|
|
|
Formability of Thin Steel Sheets Coated with Anodized Aluminum
Hušek, Martin ; Suchánek, Jan (referee) ; Spišák,, Emil (referee) ; Dvořák, Milan (advisor)
Thesis deals with the design of the technological process of anodic oxidation (creating elox coating) on aluminium film in the system steel-aluminium-elox, with the findings of characteristics of this system, comparing with the contemporary knowledge and practical utilization of this system in practice. My thesis in the teoretical part describes creating of anodic oxidation (elox coating) and the process of bending and stretching the sheet. Theoretical aspects of interaction among elox finish, process of bendings and process of stretching are implemented in the experimental part and they are supported by identified knowledge and results. The practical part is focused on improving adhesion, designing and constructing a multifunctional bending product for testing resistance of the finish applied on a tested product. Under the terms of determination distributing deformation and tension in bended coated plate, this plate is tested by statistic analysis with the help of the Finit Element Method (FEM) in the programme ANSYS. The experimental part compares discovered results of each experiment in the system steel – aluminium – elox with the results of aluminium plates with elox finish, stainless plates and steel plates with aluzinc.
|
|
|
Influence of surface treatments on the quality of molded parts
Okurka, David ; Dvořák, Milan (referee) ; Hušek, Martin (advisor)
This thesis examines the influence of surface treatments on the quality of molded parts. At the beginning of this work explains why the finish and what are the current demands on the development of manufacturing technologies. It further describes the most common surface treatment of metals, which are currently very often occur. The next section is divided into forming the surface and volume and describes the different types of species-forming, such as cutting, bending, drawing, etc. At the end of the work described cooperation with the Hettich ČR, k.s. and Tokoz, a.s.
|
|
|
Forming Technology of Thin Sheets
Zrzavý, Jaroslav ; Hušek, Martin (referee) ; Dvořák, Milan (advisor)
This bachelor thesis deals with the technology of steel forming thin sheets bending. One section is devoted to the transfer of new knowledge of foreign literature in the field of bending technology. In the next part is made of new knowledge on a specific part of a comparison with the Czech literature.
|
|
|
The Production Technology of unrotary part with flange
Přikryl, Zdeněk ; Hušek, Martin (referee) ; Císařová, Michaela (advisor)
Study describes application of forming technology for the production of unrotary parts with flange. The Study considers preliminary technology of forming processes in general. Further includes problems about drawing of unrotary parts with flange from singular to complex shaped. The next part of study includes evaluation of methods of the production belt gear shelter considering product criterias for series production and final accuracy and quality. Following part includes suggestion of the production technology of belt gear shelter using sheet metal forming. In the next parts of the study attends to accurate technological process elaboration of the components, to technological calculations and to project tool configuration. In conclusion the study includes technoeconomic evaluation of propřed technology production.
|
|
|
Smoothed Particle Hydrodynamics in Structural Dynamics
Hušek, Martin ; Králik,, Juraj (referee) ; Maňas,, Pavel (referee) ; Kala, Jiří (advisor)
The focus of the thesis is on the application of the Smoothed Particle Hydrodynamics (SPH) method in structural dynamics with an emphasis on usage of quasi-brittle materials. The first part is focused on the introduction, history, and theoretical background of SPH. Numerical examples in which strengths and weaknesses of SPH are shown follow. In addition to pure SPH models, several coupling approaches with the Finite Element Method (FEM) are also discussed. After the introduction of SPH, the focus is on quasi-brittle materials and their reinforced variants. The numerical concept and mathematical background of the Continuous Surface Cap Model are outlined, several benchmarks are presented. Strain-rate effects and their impact on pure SPH and coupled SPH-FEM models are evaluated next. In this section, the author proposes a new approach for SPH models reinforcement with FEM beam elements. The coupling approach was named sublayer coupling and shows a potential in simulations while the SPH tensile instability is alleviated. Since concrete is often associated with heterogeneity and very specific material structure, a unique algorithm for concrete structure generation in combination with SPH is proposed in the next chapter. The concept is based on utilization of coherent noise functions which can bring a variability to numerical models. It has been proved that the algorithm is robust, stable, and easy to implement into the SPH framework. With regard to that, the so-called numerical heterogeneity, a concept of parameters variability implementation, is introduced together with examples. The last part of the thesis is dedicated to the application of SPH in real experiments. The first experiment focuses on a high velocity impact. The second experiment deals with an explosion in which the focus is on both the loaded specimen and charge. Since SPH simulates the explosive, detonation products, and the loaded specimen, it is a fully coupled fluid-structure interaction simulation.
|
|
|
Study of joints of frame steel structures
Cikánek, Ondřej ; Hušek, Martin (referee) ; Zídek, Rostislav (advisor)
Master's thesis „Study of joints of frame steel structures“ examine certain analysis types of frame steal joints, which are analysed both by component method and by specialized software IDEA RS. Obtained results are compared by both methods, in terms of load-bearing capacity and in terms of stiffness. Theoretical joints stiffness calculation according to standard ČSN EN 1993-1-8 is included in the introductory part of the thesis. In the second part, joints are designed to bear inner forces and moments, which were created by load combination effects and then analysed.
|
|
|
Steel Structure Analysis
Nováková, Ľubica ; Hušek, Martin (referee) ; Zídek, Rostislav (advisor)
This diploma thesis is engaged by analyses of steel structure. Structure was modelled in two variants, in software ANSYS Mechanical. Both models were at first counted by linear analyses, then they were counted by non-linear analyses. At the end models were counted by modal analyses. Aim of the study was evaluated and decide, which one of variant is structurally and economically most competently. Selected model was assessed on ultimate and serviceability limit state.
|
guest ::
RSS feed.