|
|
Evaluation of cold kinetic deposition technology (Cold Spray)
Buček, Tomáš ; Zimáková, Jana (referee) ; Binar, Tomáš (advisor)
Cold spray or Cold gas dynamic spraying is actually new process for coating application. Origin of Colds technology spray is thermal spray. Cold spray technology has some advantages therefor any other common thermal technology. Cold spray technology has unique properties mainly due to low deposition temperatures and the physical principle of layer growth. Master’s thesis has focused on the possibility of use for corrosion protection. Accelerated corrosion tests were performed in a condensation chamber with samples of aluminium substrate and low pressure cold sprayed copper layer. The formation of corrosion was evaluated by acoustic emission and metallographic analysis. The anti-corrosion properties of copper have been considered in practical design, as have the unique antibacterial and virus inactivating properties.
|
|
|
Study of life cycle of the accumulators
Babieska, Lukáš ; Binar, Tomáš (referee) ; Kazda, Tomáš (advisor)
This bachelor work deals with monitoring the life cycle of a lithium-ion battery. The theoretical part describes the history and development of electrochemical cells. Lithium-ion batteries are a separate chapter. There are described their principles, the most used materials for the production of negative and positive electrodes, loading characteristics and the influence of temperature. In the practical part, the influence of temperature on changes of internal impedance, cell capacity and efficiency of energy supply during the battery life cycle is monitored.
|
|
|
Use of cold kinetic deposition technology on materials used in electrical engineering
Sámel, Maroš ; Zimáková, Jana (referee) ; Binar, Tomáš (advisor)
The purpose of this diploma thesis is to get a better understanding of cold kinetic deposition (cold spray), principles of functioning of this method followed by an evaluation of advantages and disadvantages of cold spray and its comparison to conventional thermal methods and a simple summary of the practical use of cold spray with respect to different materials. Next there is a summary of the properties and uses of frequently applied metals in electrical engineering, aluminium and copper, description of metal corrosion and an understanding of the diagnostic method of acoustic emission. In the practical part, a sample with copper cold spray coating on aluminium substrate was created. Following, this sample was split for corrosion tests, where the split samples were exposed to a corrosive environment for different times of exposure. The extent of corrosion degradation of the samples was evaluated by acoustic emission and metallographic analysis for corrosion-loaded samples for 100, 200 and 300 hours. In the end, an illustrative design of the application of the cold spray technology was created.
|
|
|
Monitoring the condition of a lead-acid battery used in automobiles
Folk, Jan ; Zimáková, Jana (referee) ; Binar, Tomáš (advisor)
The aim of this bachelor thesis is to test the properties of lead-acid batteries according to the ČSN standard. The work deals with test methods on a lead-acid battery, which examines the life test, charging current test and reverse capacity test. Furthermore, the work deals with the thermal loading of the lead-acid battery under extreme conditions that may occur during transport. The lead-acid battery transport will be simulated using the Solidworks modelling program and the Ansys simulation program.
|
|
|
Evaluation of the use of non-destructive methods of acoustic emission on materials
Vašíková, Simona ; Zimáková, Jana (referee) ; Binar, Tomáš (advisor)
This master thesis is about acoustic emission itself and acoustic emission as a nondestructive method of testing materials. There are different types of metal materials corrosion too. In this thesis is possible also find corrosion protective methods. There are practical examples of use the acoustic emission method at metal materials corrosion from automotive, aviation, food processing and manufacturing industry with construction and civil engineering examples. The experimental part is focused on samples preparing and measuring the acoustic emission signals during continual corrosion process of grey cast iron in condensational corrosion chamber. These results are supported and completed with metallographic analysis.
|
|
|
Assessment of the use of 3D printing technology in industry
Blecha, Miroslav ; Šafl, Pavel (referee) ; Binar, Tomáš (advisor)
This bachelor's thesis deals with the issue of 3D printing of polymer materials. The aim of the theoretical part is to describe the history, basic technologies and materials of 3D printing. Attention was also paid to various climatic influences related to the degradation of polymers. The experimental part deals with the mechanical testing of test specimens printed from two selected materials, one of which is further chosen for loading in the climatic chamber. An electron microscope was also used during the research in order to observe fracture surfaces. The results from the mechanical tests of hardness, toughness and tensile strength were evaluated and based on them a case study was then developed regarding the IVECO 4x4 MRV vehicle.
|
|
|
Using Industry 4.0 principles for mobile warehouse design
Eisenwort, Lukáš ; Zimáková, Jana (referee) ; Binar, Tomáš (advisor)
The aim of this diploma thesis is to apply industry 4.0 principles for designing a mo-bile warehouse. The first section contains the literary research, which deals with industry 4.0 in logistics. Next part deals smart warehouses and military warehouses. Analysis of the current state of the warehouse follows, technologies and processes in the military warehouse to be exact. Afterwards, the automation design of this warehouse is addressed. Both the current and the automated states are compared using the Saaty method. Finally, the photovoltaic system is designed.
|
|
|
Creation of a tool for calculating the efficiency of renewable energy sources
Lecián, Milan ; Zimáková, Jana (referee) ; Binar, Tomáš (advisor)
This diploma thesis deals with the design of a tool for calculating the efficiency and self-sufficiency of a mobile photovoltaic system to ensure the supply of electrical energy during crisis situations. The thesis includes research on various types of renewable energy sources and storage systems. Furthermore, it describes the relationships for calculating the position of the Sun, the intensity of the incident radiation, the efficiency and the output of the PV system and the overall coverage of the system’s consumption. Based on these relationships, a computational model is created. In the next section, this developed computational model is described and shows its application in comparison with the PV*SOL program. In the final part, using the analysis performed with the computational model, a design for o mobile photovoltaic system for supplying electrical energy during crisis situations is created using PV*SOL program. The use of the proposed system is demonstrated by providing electrical energy for emergency survival of the population. The conclusion of the thesis includes an evaluation and recommendations for further research.
|
|
|
Use of acoustic emission technology to assess corrosion of materials
Procházka, Adam ; Vašíková, Simona (referee) ; Binar, Tomáš (advisor)
The thesis deals with the description of acoustic emission as a non-destructive testing method and its use in the detection of material corrosion. The first part describes the theoretical principles dealing with the explanation of what acoustic emission is, how it is defined according to the standard, what are the types of acoustic emission and how it is tested. It then discusses corrosion, the types of corrosive environments where corrosion occurs and the types of corrosion tests. It also describes where acoustic emission has been used in practice and what experiments it has been used for in terms of material monitoring. The next part of the paper describes the experiment of acoustic emission measurement on grey cast iron samples, describes the fabrication of the samples, the use of corrosion protectors, and the placement of the samples in a condensation chamber for continuous testing. The last part is the evaluation of the results .
|
|
|
Creation of a web application to select polymer materials based on mechanical properties for 3D printing
Kaziměrčíková, Lada ; Šafl, Pavel (referee) ; Binar, Tomáš (advisor)
This diploma thesis deals with 3D printing with a focus on the FDM method. Main objective of the thesis is to develop a web application which would assist in the selection of suitable polymer materials for FDM print, based on the required mechanical properties. The web application was created in Python with the usage of Flask framework and MySQL database. In order to develop this application, it was necessary to create an overview of material properties, mainly mechanical parameters and degradation mechanisms. Subsequently, testing in a climatic chamber was done, and also hardness and tensile tests for degraded samples. The collected data serves as the base of the understanding how given mechanical parameters may affect selection of the polymer material. The thesis then offers a practical instrument to help choose right material for FDM printing projects.
|
guest ::
