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Experimental analysis of lubricant film formation in hip joint replacements
Švachová, Michaela ; Dzimko, Marián (referee) ; Nečas, David (advisor)
This diploma thesis deals with an experimental analysis of lubricant film formation in hip joint replacements. The main objective is to clarify the effect of mean speed, slide-to-roll ratio, and material of femoral head on the development of film thickness, focusing on the role of particular constituents contained in model synovial fluid, such as albumin and -globulin. For this purpose, a model ball-on-disc configuration was applied, while the development of lubricant film was evaluated using the combination of fluorescent microscopy and optical interferometry. To better understand the process, coefficient of friction between implant surfaces was later investigated as well. The effect of material, slide-to-roll ratio, mean speed and model fluid composition was analysed. Results indicate that the main parameter, influencing the character of film formation, is slide-to-roll ratio. Under most conditions, the dominant constituent responsible for the film thickness development was albumin. Coefficient of friction is affected mainly by the material of implant. The thesis contains original scientific results extending the knowledge in the area of hip joint biotribology.
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Design of stend for testing of prosthetic feet
Švachová, Michaela ; Paloušek, David (referee) ; Koutný, Daniel (advisor)
The Bachelor's Thesis first reviews the general body of knowledge related to biomechanics of gait. The paper also provides definition and classification of a lower leg prosthesis together with a review of the most widely used transtibial prosthesis testing methods. The project also provides description and loading conditions of the main d ynamical a nd s tatical t est o f a lower leg p rosthesis a cording t o E N Č SN 10 328. The paper starts with analyzing the problem and continues with construction solutions complaint with testing requirements. The main output of the project is a 3D model of a test stand design with pneumatic actuator created in Inventor 2013 with related calculations in MathCad 14. The project includes also an assembly drawing, drawings of the welded pieces and drawings of other components.
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Experimental analysis of lubricant film formation in hip joint replacements
Švachová, Michaela ; Dzimko, Marián (referee) ; Nečas, David (advisor)
This diploma thesis deals with an experimental analysis of lubricant film formation in hip joint replacements. The main objective is to clarify the effect of mean speed, slide-to-roll ratio, and material of femoral head on the development of film thickness, focusing on the role of particular constituents contained in model synovial fluid, such as albumin and -globulin. For this purpose, a model ball-on-disc configuration was applied, while the development of lubricant film was evaluated using the combination of fluorescent microscopy and optical interferometry. To better understand the process, coefficient of friction between implant surfaces was later investigated as well. The effect of material, slide-to-roll ratio, mean speed and model fluid composition was analysed. Results indicate that the main parameter, influencing the character of film formation, is slide-to-roll ratio. Under most conditions, the dominant constituent responsible for the film thickness development was albumin. Coefficient of friction is affected mainly by the material of implant. The thesis contains original scientific results extending the knowledge in the area of hip joint biotribology.
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Design of stend for testing of prosthetic feet
Švachová, Michaela ; Paloušek, David (referee) ; Koutný, Daniel (advisor)
The Bachelor's Thesis first reviews the general body of knowledge related to biomechanics of gait. The paper also provides definition and classification of a lower leg prosthesis together with a review of the most widely used transtibial prosthesis testing methods. The project also provides description and loading conditions of the main d ynamical a nd s tatical t est o f a lower leg p rosthesis a cording t o E N Č SN 10 328. The paper starts with analyzing the problem and continues with construction solutions complaint with testing requirements. The main output of the project is a 3D model of a test stand design with pneumatic actuator created in Inventor 2013 with related calculations in MathCad 14. The project includes also an assembly drawing, drawings of the welded pieces and drawings of other components.
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