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Influence of glass fibers as negative electrode additives on properties of the lead accumulator
Cvaniga, Tomáš ; Zimáková, Jana (referee) ; Bača, Petr (advisor)
Main topic of bachelor project is studing effects of glass fibers as additives on the properties of the negative electrode lead-acid battery for hybrid electric vehicles. Purpose of bachelor work is to examine how to increase battery life due to glass fibers. In theoretical part of work is explained the activity of both types of lead-acid batteries, battery with flooded system and battery with hermetic system. There are processed other types of batteries. There is devoted space to the chemical process that take place during the battery operation. Accumulators operate in PSoC and there are explained some possible problems during the life of battery, which can lead to lose the charging ability. In this issue there are known concepts as PLC1, PLC2 and PLC3. There are processed some graphs in practical part, that show activity in the battery DoD mode, PSoC mode and formation process. There is an aim to study how the capacity changes after PSoC I and PSoC II mode.
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Assessment of fracture risk for a langlauf ski made as a glass fibre reinforced sandwich
Láštic, Daniel ; Majer, Zdeněk (referee) ; Burša, Jiří (advisor)
The first part of bachelor’s thesis is devoted to basic theoretical knowledge about usage of sandwich theory of beams, which are made of different materials in the core and faces. This part includes brief description of composites (common car- rying component of sandwich structures) with emphasis put on the fibre compo- sites and laminates. A special characteristic of composites – orthotropy is men- tioned. The second part is focused on description of obtaining of elastic constants of materials used in the real cross-country ski by experiment, on stress calculation and fracture risk assessment in cross-country ski made as sandwich structure for the most adverse operational state. The solution is executed with the help of an- alytical formulas of mechanics of materials derived in this part. The problem is also solved using finite element method (FEM) employing ANSYS software.
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Influence of glass fibers as negative electrode additives on properties of the lead accumulator
Cvaniga, Tomáš ; Zimáková, Jana (referee) ; Bača, Petr (advisor)
Main topic of bachelor project is studing effects of glass fibers as additives on the properties of the negative electrode lead-acid battery for hybrid electric vehicles. Purpose of bachelor work is to examine how to increase battery life due to glass fibers. In theoretical part of work is explained the activity of both types of lead-acid batteries, battery with flooded system and battery with hermetic system. There are processed other types of batteries. There is devoted space to the chemical process that take place during the battery operation. Accumulators operate in PSoC and there are explained some possible problems during the life of battery, which can lead to lose the charging ability. In this issue there are known concepts as PLC1, PLC2 and PLC3. There are processed some graphs in practical part, that show activity in the battery DoD mode, PSoC mode and formation process. There is an aim to study how the capacity changes after PSoC I and PSoC II mode.
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Assessment of fracture risk for a langlauf ski made as a glass fibre reinforced sandwich
Láštic, Daniel ; Majer, Zdeněk (referee) ; Burša, Jiří (advisor)
The first part of bachelor’s thesis is devoted to basic theoretical knowledge about usage of sandwich theory of beams, which are made of different materials in the core and faces. This part includes brief description of composites (common car- rying component of sandwich structures) with emphasis put on the fibre compo- sites and laminates. A special characteristic of composites – orthotropy is men- tioned. The second part is focused on description of obtaining of elastic constants of materials used in the real cross-country ski by experiment, on stress calculation and fracture risk assessment in cross-country ski made as sandwich structure for the most adverse operational state. The solution is executed with the help of an- alytical formulas of mechanics of materials derived in this part. The problem is also solved using finite element method (FEM) employing ANSYS software.
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