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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Comparison of micro-lattice structures for energy absorption
 Koban, Tomáš ; Vrána, Radek (referee) ; Červinek, Ondřej (advisor)
Additively manufactured metal micro-structures have great potential in energy absorption applications. The recent research in this field led to a much better understanding of failure behaviour of these micro-structures. This thesis focuses on comparison of energy absorption ability of strut-based micro-lattice structures manufactured by selective laser melting depending on their topology and basic material. Energy absorption of three types of lattice structures (BCC, BCCZ, GBCC) made from stainless steel 316L and aluminium alloy AlSi10Mg was examined. Specific energy absorption was used to compare the two materials. The results show that micro-lattice structures made from stainless steel outperform the aluminium ones in energy absorption ability. The highest amount of absorbed energy was measured for BCCZ structure. This thesis describes the failure mechanism of micro-lattice structures and offers a complex evaluation of energy absorption for both materials.
Detailed record
Rolling bearing stiffness calculation
 Koban, Tomáš ; Vlach, Radek (referee) ; Lošák, Petr (advisor)
In this thesis, an analytical approach for calculating the bearing stiffness of ball and cylindrical roller bearings is presented. Three mathematical models have been developed for the case of axial, radial and combined loading. All presented models use Hertz contact theory for determining the roller-raceway contact behavior. Analytical approach is then compared with FEA results. The static numerical simulation of a roller bearing is detailly described. The comparison between analytical and numerical approach is presented for single-row angular contact ball bearing 7304 BECBM and single-row radial cylindrical roller bearing NU 202 ECP. The results show a comprehensive comparison of bearing deflections, internal load distribution and bearing stiffness for each model.
Detailed record
Comparison of micro-lattice structures for energy absorption
 Koban, Tomáš ; Vrána, Radek (referee) ; Červinek, Ondřej (advisor)
Additively manufactured metal micro-structures have great potential in energy absorption applications. The recent research in this field led to a much better understanding of failure behaviour of these micro-structures. This thesis focuses on comparison of energy absorption ability of strut-based micro-lattice structures manufactured by selective laser melting depending on their topology and basic material. Energy absorption of three types of lattice structures (BCC, BCCZ, GBCC) made from stainless steel 316L and aluminium alloy AlSi10Mg was examined. Specific energy absorption was used to compare the two materials. The results show that micro-lattice structures made from stainless steel outperform the aluminium ones in energy absorption ability. The highest amount of absorbed energy was measured for BCCZ structure. This thesis describes the failure mechanism of micro-lattice structures and offers a complex evaluation of energy absorption for both materials.
Detailed record

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