|
|
Resonance and damping behavior of lattice structures produced by Selective Laser Melting
Lagiň, Adam ; Čížek, Petr (referee) ; Koutný, Daniel (advisor)
In reaction to the uptrend of additive manufacturing of lightweight structured metallic parts, this diploma thesis is focused on the resonant and damping behavior of micro-truss lattices produced by Selective Laser Melting (SLM) technology. Micro-truss structures already found usage in various types of optimizations. Therefore, the optimization of resonance or damping could be also assumed as possible. For this purpose, several finite element analysis approaches were used, including the referent solid element model and simplified beam models. Obtained results were verified experimentally via pulse modal analysis. Material and mechanical properties of samples for FEA results and experimental results comparison were unified through secondary experiments. The main goal of this research was to explore the behavior of resonance and damping of structures when their elementary parameters are changed. The results from both, numerical and experimental approaches confirm that the eigenfrequency and the damping ratio of the structure can be affected by the change in the truss diameter, cell size, or type of structure. The work also presents the successful methods for simplified beam model optimization, which guarantees its high precision in the wide field of tested samples. This newly obtained knowledge creates a comprehensive overview of micro-truss structures, which can be used for the conscious design of ultra-light parts with the required eigenfrequency and damping ratio.
|
|
|
Design of non-resonant sample holders
Lagiň, Adam ; Koutný, Daniel (referee) ; Sojka, Antonín (advisor)
Paramagnetické látky a nano-elektrické zariadenia môžu nájsť uplatnenie pri vývoji kvantových počítačov, vysokokapacitných úložísk dát, detektorov žiarenia a iných zariadení. Vysokofrekvenčná elektrónová paramagnetická (VF-EPR) spektroskopia je vedecká disciplína skúmajúca, štrukturálne a magnetické vlastnosti týchto látok. Témou tejto práce je návrh nerezonančných držiakov pre VF-EPR spektrometer určených pre rôzne typy vzoriek, najmä peliet z lisovaného prášku a nano-elektrických zariadení umiestnených na čipe. Výsledkom práce sú tri kalibrované prototypy držiakov, ktorých funkčnosť je otestovaná meraniami.
|
|
|
Resonance and damping behavior of lattice structures produced by Selective Laser Melting
Lagiň, Adam ; Čížek, Petr (referee) ; Koutný, Daniel (advisor)
In reaction to the uptrend of additive manufacturing of lightweight structured metallic parts, this diploma thesis is focused on the resonant and damping behavior of micro-truss lattices produced by Selective Laser Melting (SLM) technology. Micro-truss structures already found usage in various types of optimizations. Therefore, the optimization of resonance or damping could be also assumed as possible. For this purpose, several finite element analysis approaches were used, including the referent solid element model and simplified beam models. Obtained results were verified experimentally via pulse modal analysis. Material and mechanical properties of samples for FEA results and experimental results comparison were unified through secondary experiments. The main goal of this research was to explore the behavior of resonance and damping of structures when their elementary parameters are changed. The results from both, numerical and experimental approaches confirm that the eigenfrequency and the damping ratio of the structure can be affected by the change in the truss diameter, cell size, or type of structure. The work also presents the successful methods for simplified beam model optimization, which guarantees its high precision in the wide field of tested samples. This newly obtained knowledge creates a comprehensive overview of micro-truss structures, which can be used for the conscious design of ultra-light parts with the required eigenfrequency and damping ratio.
|
|
|
Design of non-resonant sample holders
Lagiň, Adam ; Koutný, Daniel (referee) ; Sojka, Antonín (advisor)
Paramagnetické látky a nano-elektrické zariadenia môžu nájsť uplatnenie pri vývoji kvantových počítačov, vysokokapacitných úložísk dát, detektorov žiarenia a iných zariadení. Vysokofrekvenčná elektrónová paramagnetická (VF-EPR) spektroskopia je vedecká disciplína skúmajúca, štrukturálne a magnetické vlastnosti týchto látok. Témou tejto práce je návrh nerezonančných držiakov pre VF-EPR spektrometer určených pre rôzne typy vzoriek, najmä peliet z lisovaného prášku a nano-elektrických zariadení umiestnených na čipe. Výsledkom práce sú tri kalibrované prototypy držiakov, ktorých funkčnosť je otestovaná meraniami.
|
guest ::
