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Stress-strain analysis of skull implant using analytical and numerical solution methods
Sehnal, Dominik ; Borák, Libor (referee) ; Marcián, Petr (advisor)
This thesis focuses on stress-strain analysis of cranial implant. The research of literature available dealing with the problems of cranium implants and the solution of the stress analysis is incorporated. Furthermore, the basic information about an approach to the design and fabrication of medical implants is included. Subsequently, two ways of possible solution to the method of stress-strain analysis on an computational model of cranium (partially spherical shell) are introduced. These are analytical and numerical solution by using the finite element method in the Ansys programme. The calculated solutions of a particular type of task about deformation and stress are compared and evaluated with the solution acquired from the high level computational model of cranium with shaped irregular implant applied.
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Low cycle fatigue research and application in nuclear industry
Sehnal, Dominik ; Kuželka, Jiří (referee) ; Hůlka, Jiří (advisor)
Fatique life extension of nuclear powerplants lies in the search for project reserves. This work deals with the evaluation of low-cycle fatigue of nuclear installations of the VVER type and the assessment of the influence of the computational model level. Fatigue tests of austenitic steel using optical method of digital image correlation for which the evaluation procedure is designed and used is performed. Selected model of plasticity with kimenatic (Chaboche) and combinated hardening (Chaboche, Voce) are calibrated from the obtained data. Subsequently, the durability of the test specimen is determined by computational modeling for different material models. From the comparison of the results of fatigue tests with the calculation, the material models suitable for the description of fatigue life and their validity are determined.
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Low cycle fatigue research and application in nuclear industry
Sehnal, Dominik ; Kuželka, Jiří (referee) ; Hůlka, Jiří (advisor)
Fatique life extension of nuclear powerplants lies in the search for project reserves. This work deals with the evaluation of low-cycle fatigue of nuclear installations of the VVER type and the assessment of the influence of the computational model level. Fatigue tests of austenitic steel using optical method of digital image correlation for which the evaluation procedure is designed and used is performed. Selected model of plasticity with kimenatic (Chaboche) and combinated hardening (Chaboche, Voce) are calibrated from the obtained data. Subsequently, the durability of the test specimen is determined by computational modeling for different material models. From the comparison of the results of fatigue tests with the calculation, the material models suitable for the description of fatigue life and their validity are determined.
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Stress-strain analysis of skull implant using analytical and numerical solution methods
Sehnal, Dominik ; Borák, Libor (referee) ; Marcián, Petr (advisor)
This thesis focuses on stress-strain analysis of cranial implant. The research of literature available dealing with the problems of cranium implants and the solution of the stress analysis is incorporated. Furthermore, the basic information about an approach to the design and fabrication of medical implants is included. Subsequently, two ways of possible solution to the method of stress-strain analysis on an computational model of cranium (partially spherical shell) are introduced. These are analytical and numerical solution by using the finite element method in the Ansys programme. The calculated solutions of a particular type of task about deformation and stress are compared and evaluated with the solution acquired from the high level computational model of cranium with shaped irregular implant applied.
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