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Spirální šnekový dopravník
Žádník, Lubomír ; Pokorný, Přemysl (oponent) ; Malášek, Jiří (vedoucí práce)
Bakalářská práce se zabývá návrhem spirálního šnekového dopravníku. V úvodu je představena teorie dopravníku včetně jeho využití a popisu základních částí. Následující část práce popisuje návrhový výpočet a volbu jednotlivých součástí ze zadaných parametry. Na závěr je provedeno krátké zhodnocení. Vše je doloženo výkresovou dokumentací šnekovnice, seznamu položek a výkresem sestavení.
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Stress-strain analysis of screw-bone system used in a plate-fixation of fractures
Kalnický, Jakub ; Valášek, Jiří (oponent) ; Marcián, Petr (vedoucí práce)
In the field of orthopaedics and traumatology, a whole series of problems appear related to fracture fixation by means of various types of plates. Appropriate application of the plate is the difficult task that a doctor needs to deal with in the operating room. Regarding mechanics, the number of screws and their spacing have a major impact on the healing process. If there are too many screws or lack of them, the fracture does not heal properly. This can lead to implant failure. This work deals with stress-strain analysis of screws and bone tissue with a fracture fixed by LCP. It deals with the influence of different geometrical configurations of the screws on the stress, deformation and strain of the system. For this purpose, the computational modelling was used by means of the finite element method. Two computational models have been created, on which different screw arrangement was analysed. The first computational model represents diaphysis of the femur that is at the beginning of the healing process. For the four load models and eleven geometric configurations and number of the screws, a total of 44 computations were performed. The second computational model represents the distal part of the femur. Femoral geometry model was created based on CT (computed tomography) examination, geometric model of the plate was created by 3D scanning. Deformations and stresses were compared in the three geometric configurations of the screws during the healing process.
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Spirální šnekový dopravník
Žádník, Lubomír ; Pokorný, Přemysl (oponent) ; Malášek, Jiří (vedoucí práce)
Bakalářská práce se zabývá návrhem spirálního šnekového dopravníku. V úvodu je představena teorie dopravníku včetně jeho využití a popisu základních částí. Následující část práce popisuje návrhový výpočet a volbu jednotlivých součástí ze zadaných parametry. Na závěr je provedeno krátké zhodnocení. Vše je doloženo výkresovou dokumentací šnekovnice, seznamu položek a výkresem sestavení.
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Stress-strain analysis of screw-bone system used in a plate-fixation of fractures
Kalnický, Jakub ; Valášek, Jiří (oponent) ; Marcián, Petr (vedoucí práce)
In the field of orthopaedics and traumatology, a whole series of problems appear related to fracture fixation by means of various types of plates. Appropriate application of the plate is the difficult task that a doctor needs to deal with in the operating room. Regarding mechanics, the number of screws and their spacing have a major impact on the healing process. If there are too many screws or lack of them, the fracture does not heal properly. This can lead to implant failure. This work deals with stress-strain analysis of screws and bone tissue with a fracture fixed by LCP. It deals with the influence of different geometrical configurations of the screws on the stress, deformation and strain of the system. For this purpose, the computational modelling was used by means of the finite element method. Two computational models have been created, on which different screw arrangement was analysed. The first computational model represents diaphysis of the femur that is at the beginning of the healing process. For the four load models and eleven geometric configurations and number of the screws, a total of 44 computations were performed. The second computational model represents the distal part of the femur. Femoral geometry model was created based on CT (computed tomography) examination, geometric model of the plate was created by 3D scanning. Deformations and stresses were compared in the three geometric configurations of the screws during the healing process.
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