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Reliability analysis of the hip joint endoprosthesis ceramic head
Málek, Michal ; Janíček, Přemysl (referee) ; Fuis, Vladimír (advisor)
This diploma thesis deals with probability of fracture ceramic head of total hip endoprosthesis during tests by the standard ISO 7206-5. In the first part is made stress analysis with method of finite elements in program ANSYS. Six types of ceramic head with different geometry was analysed for ideal geometry of head and shaft, and also for shape imperfections from nominal conical shaft and head. The final values of principal stress from stress analysis were entry values for the second part – probability of fracture analysis. Weibull weakest-link theory was applied, namely 3-Parameter and 2-Parameter Weibull distribution.
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Design of Door Frame Curvature
Merkl, Martin ; Málek, Michal (referee) ; Lošák, Petr (advisor)
This diploma thesis deals with the design of door frame curvature, meant for rail vehicle. Flat glass is adhesively bonded onto the curved door frame and due to the elastic deformation the door frame bends backwards. Hence the door frame must be bend with reserve so that the elastic deformation is covered. Finite element analysis of currently manufactured door with constant curvatere has been carried out, with this analysis it has been checked that the chosen problem approach is suitable. Design of door frame curvature is then made for door frame with combined curvature (different for lower and upper part of door frame). The aim of this thesis was to design the curvature so that after glass is bonded onto it, the door frame will have the right dimensions.
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Safety factor evaluation for an out-of-plane frame under static loading
Málek, Michal ; Profant, Tomáš (referee) ; Burša, Jiří (advisor)
This bachelor thesis deals with evaluation of safety factor of a space frame when being statically loaded. This examination was demonstrated on a particular example. In order to solve the above mentioned, we exploit the frame symmetry. Unknown parameters were identified from deformation conditions in the point of intersection of the symmetry plane and the frame centreline, where the shift and two turning angles equal zero, and further by means of Maxwell- Mohr variant of Castigliano's theorem for determination of the frame deformation. The basis for calculations of stresses was represented by the theory of combined bar loading, particularly combination of bending and torsion. When examining the frame safety we took into consideration mainly dangerous points possibly occuring through cranks and fixed supports, where stress concentration occurs. The results of analytical solution were verified by numerical calculation in program ANSYS 10.0.
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Analysis of the Sunday Columns of České Slovo and Venkov in Selected Years
Málek, Michal ; Köpplová, Barbara (advisor) ; Cebe, Jan (referee)
The diploma thesis Analysis of the Sunday Columns of České Slovo and Venkov in Selected Years is devoted to the analysis of sunday supplements and columns of the daily newspapers České slovo and Venkov in 1933 and 1943. The aim of the thesis was to find out what these supplements and columns looked like, what topics they dealt with, what their character was and how they changed in the selected time horizon and historical context. A content analysis of the sunday newspaper columns and supplements was used to determine what these columns looked like, what their structure was, and what topics they covered. The analysis itself always included the first sunday edition of each month from 1933 and 1943. The analysis also showed that the sunday columns and supplements of both newspapers had an entertainment function and provided readers with mainly relaxing reading in the form of fiction and interest or popular science columns. In addition, it was found that these sunday columns were also largely aimed at women and children, to whom separate supplements and columns were devoted. The diploma thesis also explains how the different political focus of the two newspapers was reflected in these sunday supplements and how this content were affected by propaganda during the Protectorate of Bohemia and Moravia.
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Biomechanical gait analysis in cerbral palsy
Málek, Michal ; Tlapáková, Eva (advisor) ; Malá, Michaela (referee)
Title: Biomechanical gait analysis in cerbral palsy Objectives: The main aim of this work is to compare pressure values on feet of young man with cerebral palsy during for him normal gait, gait with French crutches in narrow (modified) and wide (natural) holding and with crutch held only at left hand. Methods: One 23-years-old proband with sapstic triparetic cerebral palsy was participated in a qualitative research (case studies). Young man was examined using the Pedar - X pressure measuring system. The proband was subjected to measurements with pressure insoles placed in his shoes. Natural gait measurement, narrow (modified) and wide (natural) crutches grip and crutche on left side all measurements with five repetitions were performed, each with four step cycle. Evaluated were the pressure distribution and the magnitude of the vertical force component. Results: Proband's gait showed considerable asymetry in the step cycle. The pressure distribution on the feet was more uneven during walking with the crutches narrow held against the natural gait. However, the greatest asymmetry and congestion of the left leg was created when walking with crutches with wide (natural) grip. During measurement with the crutch on the left, there were no significant decreases or increases in values. The vertical...
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Biomechanical gait analysis in cerbral palsy
Málek, Michal ; Tlapáková, Eva (advisor) ; Malá, Michaela (referee)
Title: Biomechanical gait analysis in cerbral palsy Objectives: The main aim of this work is to compare pressure values on feet of young man with cerebral palsy during for him normal gait, gait with French crutches in narrow (modified) and wide (natural) holding and with crutch held only at left hand. Methods: One 23-years-old proband with sapstic triparetic cerebral palsy was participated in a qualitative research (case studies). Young man was examined using the Pedar - X pressure measuring system. The proband was subjected to measurements with pressure insoles placed in his shoes. Natural gait measurement, narrow (modified) and wide (natural) crutches grip and crutche on left side all measurements with five repetitions were performed, each with four step cycle. Evaluated were the pressure distribution and the magnitude of the vertical force component. Results: Proband's gait showed considerable asymetry in the step cycle. The pressure distribution on the feet was more uneven during walking with the crutches narrow held against the natural gait. However, the greatest asymmetry and congestion of the left leg was created when walking with crutches with wide (natural) grip. During measurement with the crutch on the left, there were no significant decreases or increases in values. The vertical...
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