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Use of Retomo software for computational modeling in biomechanics
Filková, Alena ; Lisický, Ondřej (referee) ; Marcián, Petr (advisor)
This bachelor thesis deals with the issue of musculoskeletal biomechanics. More precisely, of creating a geometry model based on CT data using the RETOMO program and then a computational model. The introductory part is devoted to a brief explanation of the concepts of computed tomography and finite element methods. The following chapter provides a search of programs used to create models of geometry from CT data in biomechanics. Furthermore, the work deals with the description of selected functionalities and user environment of the RETOMO program, with the greatest emphasis on the creation of a geometry model from CT data. During the implementation of the bachelor's thesis, two models of geometry were created in the analysed program, using different segmentation functions, which were then compared with each other and then compared with a model of geometry created in another program. The GOM Inspect program was used to compare the geometry deviations of individual models. Finally, computational models were created using the CATIA program and then deformation and stress analysis was performed using the ANSYS program. The results of individual solutions were analysed, compared and evaluated.
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Stress-Strain Analysis of Plate for Fixing a Tibial Fracture Type I per Schatzer's Classification
Filková, Alena ; Valášek, Jiří (referee) ; Marcián, Petr (advisor)
Fractures of the proximal tibia are the most severe intra-articular fractures with subsequent frequent complications. In most cases, the fracture is treated with an inner plate or screws. This diploma thesis focuses on the stress-strain analysis of the plate fixed in the tibia using bone screws. Computational modeling using the finite element method was used to assess the mechanical interaction between the individual elements of this system. For this purpose, it was necessary to conduct a research study dealing with issues involving bone tissue, their damage and subsequent treatment of fractures. Stress-strain analysis was performed for two variants of fixation of this fracture: fixation with an angularly stable plate with screws and fixation with compression lag screws. Furthermore, these analyses were supplemented by their modifications, which represented different levels of these two variants of the computational model. Screws for fixing the plate in the bone tissue were considered both threaded and unthreaded. The interface between the screws and the bone tissue was solved using the Bonded contact and also the Frictionless contact. The influence of these modifications of the computational model on the resulting deformation and stress characteristics was assessed in the evaluation of the results. The mechanical interaction between the elements of this system was assessed in all performed variants.
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Stress-Strain Analysis of Plate for Fixing a Tibial Fracture Type I per Schatzer's Classification
Filková, Alena ; Valášek, Jiří (referee) ; Marcián, Petr (advisor)
Fractures of the proximal tibia are the most severe intra-articular fractures with subsequent frequent complications. In most cases, the fracture is treated with an inner plate or screws. This diploma thesis focuses on the stress-strain analysis of the plate fixed in the tibia using bone screws. Computational modeling using the finite element method was used to assess the mechanical interaction between the individual elements of this system. For this purpose, it was necessary to conduct a research study dealing with issues involving bone tissue, their damage and subsequent treatment of fractures. Stress-strain analysis was performed for two variants of fixation of this fracture: fixation with an angularly stable plate with screws and fixation with compression lag screws. Furthermore, these analyses were supplemented by their modifications, which represented different levels of these two variants of the computational model. Screws for fixing the plate in the bone tissue were considered both threaded and unthreaded. The interface between the screws and the bone tissue was solved using the Bonded contact and also the Frictionless contact. The influence of these modifications of the computational model on the resulting deformation and stress characteristics was assessed in the evaluation of the results. The mechanical interaction between the elements of this system was assessed in all performed variants.
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Use of Retomo software for computational modeling in biomechanics
Filková, Alena ; Lisický, Ondřej (referee) ; Marcián, Petr (advisor)
This bachelor thesis deals with the issue of musculoskeletal biomechanics. More precisely, of creating a geometry model based on CT data using the RETOMO program and then a computational model. The introductory part is devoted to a brief explanation of the concepts of computed tomography and finite element methods. The following chapter provides a search of programs used to create models of geometry from CT data in biomechanics. Furthermore, the work deals with the description of selected functionalities and user environment of the RETOMO program, with the greatest emphasis on the creation of a geometry model from CT data. During the implementation of the bachelor's thesis, two models of geometry were created in the analysed program, using different segmentation functions, which were then compared with each other and then compared with a model of geometry created in another program. The GOM Inspect program was used to compare the geometry deviations of individual models. Finally, computational models were created using the CATIA program and then deformation and stress analysis was performed using the ANSYS program. The results of individual solutions were analysed, compared and evaluated.
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