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Stress-strain analysis of artery with atheroma
Maša, Marek ; Návrat, Tomáš (referee) ; Burša, Jiří (advisor)
The main goal of this diploma thesis was the stress-strain analysis of iliac artery with atheroma.This problem was solved using finite element method (FEM).For the calculation purposes three two-dimensional models were created. The geometry was gained from transversal sections through the iliac artery with ateroma. This geometry is educed from used literature review. The main calculation process was run by ANSYS 11.0 program system.
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Stress - strain analysis of save premolar tooth
Sáblíková, Zdeňka ; Fuis, Vladimír (referee) ; Florian, Zdeněk (advisor)
This diploma thesis deals with stress-strain analysis of healthy and save tooth. Defor-mation and stress of tooth system with a part of jawbone was solved by calculating method, FEM in computing system ANSYS Workbench 11. Stress-strain analysis of save of tooth was performed in twenty-five ways describing various classes and sizes of cavity, filling material and model of connection between the filling and the tooth.
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Stress - strain analysis of jaw with decrease bone tissue
Krpalek, David ; Fuis, Vladimír (referee) ; Florian, Zdeněk (advisor)
This diploma thesis deals with stress - strain analysis of jaw with decrease of bone tis-sue. At first was created a model of geometry using graphic program Rhinoceros 4.0 upon acquisition by the 3D scanner. That was converted to the computational system ANSYS Workbench 11 which uses for solving the finite element method (FEM). Solving was executed with homogenous, linear and isotropic material model of bone with different characteristics for compact and cancellous bone. Forces of the three working muscles, which participate on chewing, were given on the basis of the force and moment balance mandible. Solving was executed for 12 variant simulating occlusion in places, where was earlier found teeth.
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Stress-strain analysis of winepress frame
Vaculka, Miroslav ; Fedorova, Svitlana (referee) ; Novák, Kamil (advisor)
This bachelor’s thesis deals with stress-strain analysis of winepress frame. The press is made of self help. No analysis has been performed for it yet. The thesis contains its detailed research, then basic research about other winepresses and research in the Mechanics of Materials. A computational model was set and stress-strain analysis was done in an analytical approach and numerical approach using the program ANSYS. Everything was evaluated in the discussion of the results, including the achievement of the safety factor to limit the state of elasticity. A system approach was used in the entire bachelor’s thesis.
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Stress-strain analysis of skull implant
Hřičiště, Michal ; Borák, Libor (referee) ; Marcián, Petr (advisor)
Lebeční implantáty se používají jako náhrady částí lebečních kosti, které v důsledku zranění nebo nemoci ztratili svou funkci. Důležitým faktorem, který ovlivňuje funkci celé soustavy implantátu, jsou jeho mechanické projevy. Tato práce stručně shrnuje současné znalosti v oblasti rekonstrukce lebečních defektů a popisuje srovnání různých tvarů stěn implantátu vytvořených z různých materiálů, na základě deformační napěťové analýzy modelu neurocrania s umístěným implantátem, zatíženým nitrolebečním tlakem a vnějším zatížením.
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Stress-strain analysis of axisymmetric body solved by analytical and numerical approaches
Mívalt, Tomáš ; Petruška, Jindřich (referee) ; Novák, Kamil (advisor)
The bachelor’s thesis deals with stress-strain analysis of axisymmetric body. As suitable axisymmetric body was chosen combustion engine piston. Thesis includes study of piston loads and possibilities of stress-strain calculations. This is followed by research in field of historical approaches of stress-strain calculations and tension evaluating and classification. In the practical part of thesis, analytical solution was solved with different computational models – fixed plate, supported plate and composite body – composed of shell and plate. After solving analytical models, numerical approach took place; FEM with different resolutions was used in ANSYS system. In conclusion of the thesis, all data and result were compared and appropriate conclusions were made.
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Stress-strain analysis of the solids with highly curved centerline
Peter, Ondřej ; Man, Vojtěch (referee) ; Novák, Kamil (advisor)
The bachelor thesis deals with stress-strain analysis of the solid with highly curved centerline. The thesis is divided into three main parts: background research, computation modelling and performing of the experiment. All analytical equations and practical examples were summarized in the first part of this thesis. In second part, computation model is solved by using analytical and numerical approach. Next, the analytical and numerical approaches are compared to each other. Third part deals with experiment.
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Stress - strain analysis of bridge structure during the train passage
Kolárik, Matej ; Navrátil, Petr (referee) ; Skalka, Petr (advisor)
The bachelor’s thesis concerns the stress-strain determination of the rail bridge in Komárov during the train crossing. The task was solved in the program ANSYS which uses the finite element analysis. The following factors were taken into consideration: a non-loaded state, the state of a train assembly load, and detailed observation of a continual crossing of diesel train. Following the series of results the most dangerous state was defined and the safety calculated.
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Stress-strain analysis of clamping mechanism element
Gergeľ, Erik ; Navrátil, Petr (referee) ; Skalka, Petr (advisor)
The bachelor thesis deals with creation of computational model and solves Stressstrain analysis of a car window clamping mechanism element. The main focus of thesis is to locate a critical area of part and find out the distribution of stress is this area. FEA system ANSYS was used for this analysis. The shape optimization based on results of FEA was successful. The equivalent stress was significantly lowered. It would be able to increase the operating time of clamping element.
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Compressive testing of pillars: numerical study
Petráčková, Klára ; Zouhar, Michal (referee) ; Náhlík, Luboš (advisor)
Determination of mechanical properties of thin films, which are used e.g. in electronics, is not simple due to the required very sophisticated equipments. Also the interpretation of results is rather difficult. This bachelor’s thesis is focused on determination of important factors which affect the microcompressive testing results. For microcompressive testing, the pillars made from studied thin film attached by the bottom to a substrate are used. There can be another thin interlayer between studied film and the substrate. The pillar is made by focused ion beam (FIB). Pillar is loaded by a nanoindenter with flat tip while the deformation response is measured. The goal of the thesis is numerical simulation (using the Finite Element Method) of the microcompressive testing and determination of individual specific geometric factors of tested pillars on Young’s modulus of the thin film. Data from microcompressive testing of aluminium thin film attached to silicon substrate with tungsten interlayer were available for numerical simulation. We have estimated influence of specific pillar geometry on data using compressive testing and improved evaluation of Young’s modulus. We have presented a recommendation for more accurate evaluation of Young’s modulus determined from experimental data involving inaccuracy following the pillar shape. The results and methods presented in this thesis can be useful in future development of compressive testing technique for determination of mechanical properties of metal thin films.
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