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Analysis of the mechanical properties of plastic materials for 3D printing
Jelínek, Jan ; Bártková, Denisa (referee) ; Koutný, Daniel (advisor)
This work will solve the mechanical properties of materials used in the FDM technology.Thetensile and flexuralmechanical properties depending on theprintingparameterswillbetested. Fortestingare used three types of sampleswithdifferentrastersforeachof the tests. The first type of raster is characterized by a fundamentalparameter, whichisoffered by themanufacturer. The second type of raster is characterized by a high number of thin-fiber material and a higherconcentrationof air gaps. The third type of rasterischaracterized by minimalnumberof air gaps and a minimum number of thick-fibers in thecross-sectionalofsample. These typesofsamples will be tested on selected materials. The results of individual tests willbecomparedamongselectedmaterials and types of samples. The aim of this work is to show the dependence of mechanical properties on the type ofprintingstrategy.
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High cycle fatigue of Ti6Al4V titanium alloy
Bártková, Denisa ; Liškutín, Petr (referee) ; Věchet, Stanislav (advisor)
The main goal of this master's thesis is an analysis of high-cycle fatigue of titanium alloy Ti- 6Al- 4V. In the first section of a theoretical part of the thesis, there are summarized current facts about production, properties and aplications of titanium alloys. The second section pursues fatigue behaviour of material. An experimental part consists of metallographic analysis, evaluation of tension and bending tests and mainly analysis of high-cycle fatigue behavior for different assymetry ratios.
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Low cycle fatigue of EN-AW 7075 aluminium alloy
Bártková, Denisa ; Liškutín, Petr (referee) ; Věchet, Stanislav (advisor)
The main goal of this bachelor thesis is analysis of low-cycle fatigue of wrought alluminium alloy EN-AW 7075. In theoretical part of thesis, current facts about alluminium alloys and fatigue behaviour of material are summarized. Practical part contains evaluation of tension tests and analysis of experiments in low-cycle fatigue region. In additional, the microstructure of an alloy was observed.
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High cycle fatigue of Ti6Al4V titanium alloy
Bártková, Denisa ; Liškutín, Petr (referee) ; Věchet, Stanislav (advisor)
The main goal of this master's thesis is an analysis of high-cycle fatigue of titanium alloy Ti- 6Al- 4V. In the first section of a theoretical part of the thesis, there are summarized current facts about production, properties and aplications of titanium alloys. The second section pursues fatigue behaviour of material. An experimental part consists of metallographic analysis, evaluation of tension and bending tests and mainly analysis of high-cycle fatigue behavior for different assymetry ratios.
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Analysis of the mechanical properties of plastic materials for 3D printing
Jelínek, Jan ; Bártková, Denisa (referee) ; Koutný, Daniel (advisor)
This work will solve the mechanical properties of materials used in the FDM technology.Thetensile and flexuralmechanical properties depending on theprintingparameterswillbetested. Fortestingare used three types of sampleswithdifferentrastersforeachof the tests. The first type of raster is characterized by a fundamentalparameter, whichisoffered by themanufacturer. The second type of raster is characterized by a high number of thin-fiber material and a higherconcentrationof air gaps. The third type of rasterischaracterized by minimalnumberof air gaps and a minimum number of thick-fibers in thecross-sectionalofsample. These typesofsamples will be tested on selected materials. The results of individual tests willbecomparedamongselectedmaterials and types of samples. The aim of this work is to show the dependence of mechanical properties on the type ofprintingstrategy.
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Low cycle fatigue of EN-AW 7075 aluminium alloy
Bártková, Denisa ; Liškutín, Petr (referee) ; Věchet, Stanislav (advisor)
The main goal of this bachelor thesis is analysis of low-cycle fatigue of wrought alluminium alloy EN-AW 7075. In theoretical part of thesis, current facts about alluminium alloys and fatigue behaviour of material are summarized. Practical part contains evaluation of tension tests and analysis of experiments in low-cycle fatigue region. In additional, the microstructure of an alloy was observed.
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Determination of mechanical properties of light alloys and composites by means of Small Punch Testing
Bártková, Denisa ; Langer, J. ; Dymáček, Petr ; Válka, L.
Nowadays, in many testing areas a volume of experimental material is limited (laboratory-scaled volume, semidestructive approach). Therefore many testing techniques on miniature samples were devised. Principle of Small Punch Test (SPT) method is a penetration of small puncher through thin disc placed on a ring until the disc bursts. In dependence on loading mode it can provide information comparable to uniaxial tensile tests (UTT) and/or conventional constant load creep tests. However clarification of relations between SPT and conventional methods is difficult and empirical formulas are non-universal. The aim of this study is to i) evaluate mechanical properties of aluminium and magnesium alloys and its composites by means of SPT, ii) compare SPT results with UTT, iii) validate correlation formulas from literature, iv) propose more advanced approach to define correlation between UTT and SPT. Measurement were carried out at constant deflection rate (SPT-CDR) in two different laboratoires. Results from both laboratories were compared to evaluate the reproducibility of the method. Better results agreement was reached for the ultimate strength measurements. Yield strength results exhibited greater variance. An influence of pre-deformation of the sample on yield strength and deflection at maximum force was also identified. We can conclude, that for quantitative estimation of strength parameters we can use correlation formulas based on materials with similar composition and fracture behaviour.
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