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Resonance and damping behavior of lattice structures produced by Selective Laser Melting
Lagiň, Adam ; Čížek, Petr (oponent) ; Koutný, Daniel (vedoucí práce)
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.
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Design of non-resonant sample holders
Lagiň, Adam ; Koutný, Daniel (oponent) ; Sojka, Antonín (vedoucí práce)
Paramagnetic compounds and nano-electronic devices can find use in the development of quantum computing, high capacity data storages, irradiation detectors, and other devices. High-field electron paramagnetic (HF-EPR) spectroscopy is a scientific discipline for researching, structural, and magnetic properties of these materials. The theme of this thesis is the design of non-resonant sample holders for HF-EPR spectrometer proposed for various types of samples, especially for powders pressed into pellets and nano-electronic devices placed on a chip. The result of this work is three calibrated prototypes of holders, which functionality is proved by measurements.
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Resonance and damping behavior of lattice structures produced by Selective Laser Melting
Lagiň, Adam ; Čížek, Petr (oponent) ; Koutný, Daniel (vedoucí práce)
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.
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Design of non-resonant sample holders
Lagiň, Adam ; Koutný, Daniel (oponent) ; Sojka, Antonín (vedoucí práce)
Paramagnetic compounds and nano-electronic devices can find use in the development of quantum computing, high capacity data storages, irradiation detectors, and other devices. High-field electron paramagnetic (HF-EPR) spectroscopy is a scientific discipline for researching, structural, and magnetic properties of these materials. The theme of this thesis is the design of non-resonant sample holders for HF-EPR spectrometer proposed for various types of samples, especially for powders pressed into pellets and nano-electronic devices placed on a chip. The result of this work is three calibrated prototypes of holders, which functionality is proved by measurements.
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