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Stress-strain analysis of a bar systems using finite element method
Fodor, Ján ; Fuis, Vladimír (referee) ; Návrat, Tomáš (advisor)
The aim of this bachelors thesis is primarily programming of algorithm for solving bar systems (i.e. trusses) using finite element method. Programming language Python and his modules NumPy, SciPy and Matplotlib are used . The results thus obtained are verified in the program ANSYS . This work also gives a brief overview of commercial and freely accessible scientific software. Finite Element Method is a numerical method used for solving technical problems in mechanical engineering, structural engineering, electrical engineering and related fields.
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Stress and deformation analysis of the stem and cup of the total replacement of the trapeziometacarpal joint
Svojanovský, Tomáš ; Vosynek, Petr (referee) ; Fuis, Vladimír (advisor)
The center of attention of this bachelor’s thesis is stress and deformation analysis of the total replacement of the trapeziometacarpal joint. The first part is formed by medical essence of the matter, namely from the anatomical and pathological point of view. The connecting link between literature research and analysis creates a short introduce to the finite element method. To the stress and deformation analysis itself was used the program ANSYS Workbench 14.5 based just on the finite element method. One of the purposes is to get to know this program and to learn to gain correct results. The main target is to catch and describe stress and deformation of the simplified model of a certain implant. Despite some of the simplifications, resulting values should approach to the real values. Except for the mentioned analysis, there are introduced different approaches, which could be used for the solution. There is also some comparison of advantages and disadvantages of particular approaches.
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Influence of strain rate on stress-strain dependencies of aortic tissues
Slažanský, Martin ; Fuis, Vladimír (referee) ; Burša, Jiří (advisor)
The thesis deals with the influence of strain rate on stress-strain dependencies of aortic tissues to estimate the error of hyperelastic models, which are neglecting the viscoelastic effects that are typical for soft biological tissues. It was found by the experiment and the subsequent evaluation that in the range of the strain rate from 0,167 to 5,000 mm/s the influence of strain rate on stress-strain dependencies is negligible. The deviation by transition from experimental data to a constitutive model was significantly larger than the deviation between the data sets varying at different strain rates, which means that the use of stress-strain curves varying at different strain rates in given range of the strain rate has no effect on the resulting model. The best of analysis models that were examined in this thesis appears to be the Yeoh hyperelastic model using the FEM.
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Seismic resistance of the proposed pipeline route
Čapičík, Martin ; Nížňanský, Ľubomír (referee) ; Fuis, Vladimír (advisor)
The main goal of this thesis is seismic analysis and evaluation of given pipe line. In the first part we offer an overview of the modern seismic analysis methods utilized in nuclear power plants. In the following part we discuss the process of calculating of an assigned pipe line by means of equivalent static method in FEM Software Ansys 13. Based on the outcome we picked the least favourable load cases, which provided input data for determination of coefficients of safety and HCLPFMO34. Finally, the least favourable results are compared using the volume-solution and the analytical beam model in the Mathematica 8 software.
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Design of sand blasting machine modification
Klár, Pavel ; Fuis, Vladimír (referee) ; Krejsa, Jiří (advisor)
This thesis is focused on design and implementation of structural adjustment of sandblasting machine with regard to the requirements of resolution. The first part consist of short study describes a blasting technology and various types of blasting machines. Second part – practical part consists of problem analysis and setting goals to be achieved. The main goal of the design is to not influence the machine and to limit presence of the operators by modification in the actual process of sanding. There is also detailed design of solution’s proposal which fulfills the specified goals and is supported by calculations. Descibed design was realized and preliminary results suggest that pre-defined goals are met.
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Loading of the crane-runway girder
Vrbka, Dušan ; Fuis, Vladimír (referee) ; Suchánek, Miroslav (advisor)
The main purpose of this bachelor project is to solve Loading of the crane-runway girder. First of all, we located the possible dangerous places where we solved the running of Shear and moment diagrams which depends on distance of loading forces p from the beginning of the crane-runway. For the mathematic solutions, we used specialized software MAPLE. The main advantage of this software is the ability of the analytic analysis. We introduced the method of the solving the crane-runway girder on three supports. The final part shows the main results and highlights the most strained parts with suggestions for decrease loading level of strained parts.
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Planar frames and curved bars. Study of the significance of the influence of normal and shear forces on deformation characteristics of the centerline
Donát, Martin ; Fuis, Vladimír (referee) ; Suchánek, Miroslav (advisor)
The Aim of this thesis is to write up the relevancy of particular resultant inner effects (further denoted as RIE) on the central line bars and plane frames deformation. The relevancy of particular RIE on the choice deformation characteristic bars in dependence on the ration of central line length and characteristic cross-section proportions, support type and bar load is analyzed in the sample examples. We solve a problem whether a bent bar should be comprehended as a shall bent or as a forte bent bar and we also analyze how does the stiffness shift influence the fractional bar deformation. When solving the sample examples we suppose that the bar expectations are fulfilled. When determining the central line deformation we use the Castiglianano’s theorem because it enables to include supplies of particular RIE.
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