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Ústav konstruování - závěrečné práce
DISSERTATION TOPICS

    DISSERTATION TOPICS

    Results

    Additive manufacturing of high temperature alloys strenghten by nanoparticle dispersion
    Aditivní příprava vysokoteplotních slitin zpevněných disperzí nanočástic

    Aim of thesis: The main goal of the work will be to develop and optimize the parameters of 3D printing of precipitation-hardened nickel superalloys with added incoherent boride-based nanoparticles and to determine the relationship between the microstructure and the basic mechanical properties of the newly prepared alloys. Among the sub-objectives of the work will be the preparation of powder mixtures of nickel superalloys using a three-axis electromagnetic vibrating mixer with a graded proportion of reinforcing nanoparticles. Subsequent microstructural analysis using electron microscopy of both powders and 3D printed materials before and after uniaxial mechanical loading at temperatures up to 1000 °C is expected.
    • Topic is in cooperation with the Institute of Materials Physics of the Academy of Sciences of the Czech Republic
     Supervisor: doc. Ing. Daniel Koutný, Ph.D.

    Heat exchangers with controlled non-uniformity of refrigerant distribution
    Tepelné výměníky s řízenou nerovnoměrností distribuce chladiva

    Aim of thesis: The topic is focused on the creation of a methodology for designing a new generation of additively produced heat exchangers, using structured materials, meeting all strength requirements while minimizing weight and at the same time allowing to control the distribution of the cooling medium according to the needs of a specific application. As part of the solution to the topic, it is assumed that the existing algorithms of multi-level topological optimization for the purposes of heat exchange will be modified. In addition to changing the stiffness within one component, the algorithm should also allow local control of the cooling performance. Experimental samples as well as functional parts will be realized through metal additive SLM technology, and information on the flow and thermal properties of the structures will be obtained from cooperation with the Institute of Process Engineering.
    • Cooperation with the EU and UPI on basic and applied research projects
     Supervisor: doc. Ing. Daniel Koutný, Ph.D.
     Co-supervisor: Ing. Ondřej Vaverka

    Digital twin of wheel-rail contact
    Digitální dvojče rozhraní kolo-kolejnice

    Aim of thesis: The aim of the work is to use experimental methods to develop a model that will describe the frictional behavior of the wheel-rail contact in the presence of lubricants. The model will use real-track data to predict contact friction, allowing the lubrication system to recognize when re-application of lubricant is necessary. The result of the work will have an effect on a more efficient process of lubrication of the contact between the wheel and the rail. Lubricant consumption will be optimized while the wear of contact bodies is reduced.
    • Cooperation on a project, which will use the developed model for the control of contact lubrication on a real railway line.
     Supervisor: doc. Ing. Milan Omasta, Ph.D.
     Co-supervisor: Ing. Daniel Kvarda Ph.D.

    The use of machine learning in the processing of railway vehicle vibrodiagnostic data
    Využití strojového učení při zpracování dat vibrodiagnostiky železničních vozidel

    Aim of thesis: Predictive identification of faults and wear is a key aspect of the safe and efficient operation of railway vehicles. Machine learning methods can be used to train a model from data and generalize it to currently unmeasured data. The goal of the thesis is to train a model using machine learning on data obtained from the chassis of a railway vehicle. The resulting model will then be used for predictive maintenance of the railway bogie.
    • Cooperation on the solution of a project, which will use the developed model for diagnostics of the bogie on a railway vehicle.
     Supervisor: doc. Ing. Milan Omasta, Ph.D.
     Co-supervisor: Ing. Daniel Kvarda Ph.D.

    Prediction of wear of dental filling materials during tooth cleaning
    Predikce opotřebení dentálních výplňových materiálů při čištění zubů

    Aim of thesis: The research focuses on the analysis of the wear of dental filling materials due to toothbrushing and toothpaste during daily oral hygiene. This is an experimental work in which the effects of the tooth filling material, the shape of the end and hardness of the toothbrush fibres, the abrasiveness of the toothpaste and the effect of the use of manual and electric toothbrushes will be discussed. Attention will also be paid to the effectiveness of plaque removal.
    • Cooperation with cosmetic companies SynCare Plus, spol. s r. o. and Nobilis Tilia, spol. s r. o. Cooperation with the research group Advanced Biomaterials at CEITEC BUT in Brno. The doctoral studies will take the form of an industrial doctorate.
     Supervisor: prof. Ing. Martin Vrbka, Ph.D.
     Co-supervisor: Ing. Pavel Čípek, Ph.D.

    3D printed individualised segmental joint implant: biotribology of articular surface
    3D tištěná individualizovaná segmentální kloubní náhrada: biotribologie artikulačního povrchu

    Aim of thesis: The aim of the research is to describe the tribological behaviour of 3D printed individualised implants for local replacement of femoral head defects. The aim is to design an implant friction surface that achieves a very low coefficient of friction and minimally wears the opposing articular cartilage. This is an experimental work where suitable biocompatible materials such as titanium alloys produced by additive Selective Laser Melting, CoCrMo alloys and advanced biomaterials such as PEEK or hydrogel will be tested. The result will be a prototype of a local implant for clinical trials.
    • Cooperation with the Second Faculty of Medicine, Charles University and Motol University Hospital (prof. Havlas). Cooperation with the University of Chemistry and Technology, Prague (prof. Vojtěch). Cooperation with the implant manufacturer ProSpon, spol. s r. o. Involvement in the upcoming project call of the Czech Health Research Council.
     Supervisor: prof. Ing. Martin Vrbka, Ph.D.
     Co-supervisor: doc. Ing. David Nečas, Ph.D.

    Modelling of hydrostatic bearings control elements to ensure lubrication layer stability
    Modelování řídicích prvků hydrostatických ložisek pro zajištění stability mazací vrstvy

    Aim of thesis: The aim is to develop an experimentally verified numerical model of flow control elements ensuring the stability of thin lubrication films of hydrostatic bearings.
    • Involvement in the solution of the GAČR LA international project The possibility of an internship with the co-investigator of the project - Gdansk University of Technology
     Supervisor: doc. Ing. Petr Svoboda, Ph.D.
     Co-supervisor: Ing. Michal Michalec, Ph.D.

    3D-printed metal composites reinforced with 2D nanomaterials for next-generation biomedical implants
    3D tištěné kovové kompozity vyztužené 2D nanomateriály pro biomedicínské implantáty nové generace

    Aim of thesis: The aim is to research and develop a new generation of joint implants using 2D nanomaterials, which allow superlubricity conditions to be reached and thus ensure the replacement operation under extremely low friction coefficient and nearly zero wear. It is supposed that 2D materials represent a milestone in many engineering disciplines, including biomedical engineering. Cooperation with the academic and private sectors is planned within the topic, while the outcome of the thesis is in a new-generation implant which will be biocompatible and suitable for clinical testing.
    • Cooperation with the Pontifical Catholic University of Chile, internship abroad.
     Supervisor: doc. Ing. David Nečas, Ph.D.
     Co-supervisor: prof. Ing. Martin Vrbka, Ph.D.

    Lubrication of contacts with real conformity by greases
    Mazání kontaktů s reálnou konformitou pomocí plastických maziv

    Aim of thesis: The aim is to determine, through experiments and modelling, the effect of contact conformality and lubricant properties on the amount of lubricant available for lubricating point contacts with conformity close to real applications.
    • Cooperation with bearing companies and industrial partners
     Supervisor: prof. Ing. Martin Hartl, Ph.D.
     Co-supervisor: Ing. Petr Šperka, Ph.D.

    Lubrication of point contacts with natural lubricants
    Mazání bodových kontaktů pomocí přírodních maziv

    Aim of thesis: The aim is to describe the formation of lubricating film and friction in point contacts lubricated with natural fatty acids and other substances used as additives.
    • Internship at a prestigious foreign university
     Supervisor: prof. Ing. Martin Hartl, Ph.D.
     Co-supervisor: Ing. Petr Šperka, Ph.D.

    Friction models of interfaces from engineering plastics
    Modely tření rozhraní z technických plastů

    Aim of thesis: The aim is to describe friction principles and develop a methodology for modeling static and kinetic friction in contact between rigid bodies with surface roughness and engineering plastics. The work combines FEM modeling with experiments.
    • Cooperation with industry partners in the field
    Supervisor: prof. Ing. Martin Hartl, Ph.D.
     Co-supervisor: Ing. Petr Šperka, Ph.D.

    Development of a magnetorheological shock attenuation system for military applications
    Vývoj magnetoreologického systému tlumení rázových dějů pro armádní aplikace

    Aim of thesis: In military applications, effective shock attenuation is an important requirement. This may include damping of gun recoil, damping of seats in the event of a vehicle explosion or fall, and more. Current scientific contributions reveals that the combination of a magnetorheological (MR) suspension system together with semi-active control can be a significant advance in this area. Typically, piston velocities are in the units of m/s and high damping forces are achieved. These are therefore quite extreme operating conditions for dampers. The main focus of this work will be study of the behaviour of MR fluid at high velocities and the subsequent application of this knowledge to the design of a magnetorheological damper. The design of sensors and damper control will be important as well. The main focus of the work will be the development and experimental verification of MR suspension systems operating at high piston velocities.
    • Current issues researched in cooperation with the industrial partner Excalibur arms and within the European Defence Agency research project.
     Supervisor: doc. Ing. Milan Klapka, Ph.D.
     Co-supervisor: Ing. Zbyněk Strecker, Ph.D.

    Research on noise generation and propagation in rail transport
    Výzkum vzniku a šíření hluku v kolejové dopravě

    Aim of thesis: Noise generated by the operation of rolling stock is an ongoing social problem. One of the main sources of strong noise is wheel-rail contact. In the case of abnormal operating conditions, excessive lateral vibration of the wheel can occur, leading to the emission of a strong acoustic signal. Although some hypothetical mechanisms of wheel-rail contact noise behaviour have been described, a number of phenomena have still not been satisfactorily investigated. Especially in the context of the modern approach of adhesion management on risky track sections through the application of liquid or solid substances to the surface or sides of the rail. The aim of this thesis is to investigate the influence of operating conditions in modified contact on the occurrence of unwanted noise and its propagation to the surroundings.
    • Current issues researched in cooperation with the Brno city public transport company.
     Supervisor: doc. Ing. Milan Klapka, Ph.D.
     Co-supervisor: Ing. Daniel Kvarda Ph.D.

    Advanced bearing diagnostics for wind farms
    Pokročilá diagnostika ložisek pro větrné elektrárny

    Aim of thesis: Wind power (WPP) is one of the world's most widespread alternative sources of electricity. The desire to maximize the efficiency of the plant leads to high demands on the mechaniocal design and high reliability of all structural components. Critical components include the driveline bearings. Due to the time-varying loads, it is difficult to reliably determine their service life. At the same time their failure during operation must be prevented, as the entire turbine can be heavily damaged and high reapair cost will be required. The aim of this work is to develop an advanced predictive diagnostic method for monitoring the technical condition of the wind turbine bearings using non-destructive testing methods.
    • Cooperation with an industrial partner - manufacturer of non-destructive testing equipment DAKEL.
     Supervisor: doc. Ing. Milan Klapka, Ph.D.
     Co-supervisor: Ing. František Vlašic, Ph.D.

    Development of the measuring system for monitoring and protection of plant grow
    Vývoj měřicího systému pro monitoring a ochranu rostlin

    Aim of thesis: The trend towards efficient use of natural resources affects a wide range of sectors, including agriculture. For proper plant growth, it is essential to choose the right irrigation method to avoid underwatering or overwatering the plant and possibly wasting water. To decide whether a plant needs watering, it is necessary to know its current condition. As previous research has shown, plant condition can be reliably monitored using the acoustic emission (AE) method, which has emerged as a sensitive method for diagnosing fatigue damage to bearings. Based on the data obtained from AE sensors, decisions can be made about watering and possibly the dosage of additional soil nutrients, etc. AI control can also be used to make decisions. Automated control can then be used for automated irrigation systems for greenhouses or for hydroponics, etc. The aim of the work is then to develop a suitable measurement method that allows reliable monitoring and to develop an algorithm for evaluating the data obtained.
    • Cooperation with the manufacturer of measuring technology DAKEL and the company Compactive, s.r.o., which develops smart irrigation systems.
     Supervisor: doc. Ing. Milan Klapka, Ph.D.
     Co-supervisor: Ing. František Vlašic, Ph.D.

    3D metal printing of magnetic circuits
    3D tisk magnetických obvodů

    Aim of thesis: The aim of the topic is the research and development of structured magnetic circuits produced by the 3D metal printing method. The design of the magnetic circuits will be based on the patented technology of the Research team Technical Diagnostics (EP3373311). This technology will allow the development of highly efficient magnetic circuits. Development can be focused on several areas, such as electromagnetic actuators, valves or sensors.
    • It is expected to cooperate with an industrial partner in the field of magnetic circuits. The possibility of an internship at the TU Dresden (Germany) and the University of Edinburgh (Great Britain).
     Supervisor: doc. Ing. Michal Kubík, Ph.D.
     Co-supervisor: Ing. Zbyněk Strecker, Ph.D.

    4D printing of magnetically active elastomers
    4D tisk magneticky aktivních elastomerů

    Aim of thesis: Intensive research and development is currently underway in the field of magnetically active elastomers or hydrogels, which can be produced using so-called 4D printing. 4D printing is a new and completely unique technology that allows printing dynamic 3D structures capable of changing their shape over time. This topic aims to develop equipment and methodology for 4D printing of magnetically active elastomers and hydrogels. Part of the work will be the application of this technology to the issue of micro-robotics.
    • Possibility of an internship at TU Dresden in the team of Dr. Borin or an internship at the Malaysia-Japan Institute of Technology in the team of prof. Mazlan.
     Supervisor: doc. Ing. Michal Kubík, Ph.D.

    Advanced downhill bike suspension
    Pokročilé odpružení sjezdového kola

    Aim of thesis: The goal of the thesis will be to develop an intelligent suspension system for electric mountain bikes. Current commercially available electrically controlled wheel suspension systems do not utilize the potential of rapid semi-active control. Current systems only enable automatic valve control, which has to be adjusted manually in older dampers and is not able to ensure better-driving characteristics. Fast semi-active damping with magnetorheological dampers enables a qualitative shift in achievable driving comfort and wheel grip on the road. Demonstrators of individual components are currently being developed. However, these components will have to be integrated into the entire functional system and experimentally verify the functionality. The work will focus mainly on identifying the limiting properties of real system elements (dampers, sensors, etc.) and the subsequent design of optimal system control.
    • Cooperation with a commercial partner in the field of mountain bike production and their suspension is assumed.
     Supervisor: doc. Ing. Michal Kubík, Ph.D.
     Co-supervisor: Ing. Zbyněk Strecker, Ph.D.

    Energy efficient electric motors
    Elektromotory pro aerospace

    Aim of thesis: The goal of the topic is the design development of an electric motor using a structured magnetic circuit produced by the method of 3D metal printing. It is expected that a suitable design of the structured magnetic circuit should increase the efficiency of the electric motor, reduce its weight and at the same time improve cooling. The design of the magnetic circuit will be based on the patented technology of the Department of Technical Diagnostics (EP3373311).
    • It is expected to cooperate with an industrial partner in the field of magnetic circuits. The possibility of an internship at the TU Dresden (Germany) and the University of Edinburgh (Great Britain).
     Supervisor: doc. Ing. Michal Kubík, Ph.D.
     Co-supervisor: Ing. Zbyněk Strecker, Ph.D.

    Reducing wear on railway bogies using electronic suspension
    Snížení opotřebení železničního podvozku za pomocí elektronického odpružení

    Aim of thesis: The aim of the topic is the development of an electronically controlled suspension system for a railway unit that reduces wear on the bogie and infrastructure. The work includes experimental verification of the benefits of this system using a measuring wheelset on the InterPanter railway unit.
    • Work on the API Proof of Concept project in cooperation with Strojírna Oslavany and cooperation with Škoda Transportation.
     Supervisor: doc. Ing. Michal Kubík, Ph.D.
     Co-supervisor: Ing. Filip Jeniš, Ph.D.

    Particle emissions from the wheel-rail interface
    Emise částic z rozhraní kolo-kolejnice

    Aim of thesis: The work deals with experimental research on the emission of particulate matter from the wheel-rail interface, especially when applying lubricants and materials for traction enhancement or as a result of the wear process. The aim is to describe the critical factors influencing their formation and effect on the environment and to propose suitable measures.
    • A highly up-to-date topic combining laboratory and field tests.
     Supervisor: doc. Ing. Milan Omasta, Ph.D.
     Co-supervisor: Ing. Radovan Galas, Ph.D.

    Processing of advanced materials by Electron Beam Melting
    Zpracování pokročilých materiálů technologií Electron Beam Melting

    Aim of thesis: The aim of the work is to verify the possibilities and strategies of processing materials such as tungsten, tantalum, copper or intermetallic alloys TiAl by means of electron beam in vacuum and to evaluate their applicability in industrial applications.
    • Cooperation on the development of the device with the startup company BeamShape, s.r.o.
     Supervisor: doc. Ing. Daniel Koutný, Ph.D.
     Co-supervisor: Ing. Martin Malý, Ph.D.

    Water as a trigger for low adhesion problems between wheel and rail
    Voda jako spouštěč problémů s nízkou adhezí mezi kolem a kolejnicí

    Aim of thesis: The aim of the work is to provide experimental evidence of the transient behaviour of wheel-rail contact when contaminated with water and other materials and to explain the nature of this phenomenon based on optical observation of the contact. Emphasis is placed on describing the extent of the problem in terms of operating conditions and parameters of the contaminants. The results will be compared with simulations of a partner organisation.
    • The aim of the work is to provide experimental evidence of the transient behaviour of wheel-rail contact when contaminated with water and other materials and to explain the nature of this phenomenon based on optical observation of the contact. Emphasis is placed on describing the extent of the problem in terms of operating conditions and rheological parameters of the contaminants. The results will be compared with simulations of a partner organisation.
     Supervisor: doc. Ing. Milan Omasta, Ph.D.
     Co-supervisor: Ing. Radovan Galas, Ph.D.

    Reconfigurable mechanical metamaterials
    Rekonfigurovatelné mechanické metamateriály

    Aim of thesis: The aim of the work is to describe the mechanisms of purposefully controlled changes in the morphology of mechanical metamaterials due to changes in external force action using advanced computational modelling methods.
    • Cooperation with Institute of Lightweight Design and Structural Biomechanics, TU Wien
     Supervisor: doc. Ing. Daniel Koutný, Ph.D.
     Co-supervisor: Ing. Ondřej Červinek, Ph.D.

    Water as an ecological method for friction modification between the wheel and the rail
    Voda jako ekologický prostředek pro úpravu tření mezi kolem a kolejnicí

    Aim of thesis: The aim of the work is to investigate the impact of targeted water application on modifying friction between the wheel and the rail to achieve a desired friction level. A key aspect of this research is the prediction of real friction layer properties on the rail, which interact with the applied water.
    • collaboration with an industrial partner; field testing; research internship
     Supervisor: doc. Ing. Milan Omasta, Ph.D.
     Co-supervisor: Ing. Radovan Galas, Ph.D.

    Online monitoring of LPBF process
    Online monitorování LPBF procesu

    Aim of thesis: The aim of this work is to clarify the relationship between the laser powder bed fusion (LPBF) process setup (scanning strategy, speed, power...), defects and specific microstructure in the processed material by means of continuous observation of the process.
    • Internship at the Technical University of Munich
     Supervisor: doc. Ing. Daniel Koutný, Ph.D.
     Co-supervisor: Ing. Aneta Zatočilová, Ph.D.