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Effect of Velocity of Impact Loading to Stress, Deformation and Durability of Component of Fuel Car System
Dobeš, Martin ; Horyl, Petr (referee) ; Návrat, Tomáš (referee) ; Petruška, Jindřich (advisor)
Passive safety is a well-known term. This term can be further categorized into different topics of the car passive safety, restraint systems, safety assistants (ABS, ESP, ASR, etc.). One of these topics is passive safety of the fuel system. Safety and tightness of the fuel system must be guaranteed even under non-standard conditions, for example a collision against a fixed obstacle. This issue is not often mentioned in the field of car safety. It is considered a standard. Passive safety of the fuel system is often ensured using various interesting technical solutions and devices, usually patented ones. The development of these solutions is supported by numerical simulations in different stages of development process. The doctoral thesis deals with impact loading of the plastic components of the fuel system, in particular Fuel Supply Module (FSM), which is mounted inside the fuel tank. The flange is the most important part of the fuel supply module from the car safety point of view. The flange closes FSM on the external side of the fuel tank. The thesis focuses on the finite element analysis of the complete or partial FSM, and the flange itself during impact loading. The main objective of this thesis are numerical material models, taking into account important aspects of the mechanical behavior of polymer materials during impact loading. There are a lot of ad hoc invented or standardized experiments described in this thesis. These experiments are used for estimation of the material parameters or comparison of numerical analysis vs real conditions, or tests. The solver LS-DYNA was mainly used for numerical simulations. The final results of this thesis brings new quantified knowledge about behavior of the Typical Semi-Crystal Polymer (TSCP), not only for impact loading. The practical part of this thesis defines new methodology for the numerical simulation approach of impact loading for FSM. This methodology is directly usable for new product development. A lot of numerical material models were developed and tested. The best results were achieved using numerical material model *MAT_24 with combination of *MAT_ADD_EROSION card. The limits and parameters for this numerical material model was estimated empirically during conducting experiments. The numerical material model SAMP-1 was partly solved in this doctoral thesis, but more detail study will be given in future works.
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Strain, stress and safety analysis of the car reinforcement frame
Dobeš, Martin ; Vosynek, Petr (referee) ; Vrbka, Jan (advisor)
This master thesis deals with the strain, stress and reliability analysis of the safety frame of racing car. The safety frame is a part of passive safety, which it becomes active in a case of impact. The safety frame makes a reinforcement of the car body and provides its sufficient stiffness. The first part of the master thesis is focused on determination of stress and strain states during the static loading tests and their analysis. The loading conditions are prescribed by homologation regulations of Fédération Internationale de l´Automobile (FIA). The problem is solved, making use of computational modeling utilizing the Finite Element Method (FEM). The first part of thesis is used for the stiffness and safety analysis under the static loading test. The second part deals with the effect of loading velocity on the stress and strain states using the computational modeling and solver LS-DYNA.
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Pedestrian Protection Systems in Car Collisions
Rupčík, Jan ; Maršálek, Ondřej (referee) ; Raffai, Peter (advisor)
This bachelor thesis deals with the protection of pedestriáns in a collision with a vehicle. The first section describes the history of vehicle safety. The next section is focused on the evaluation safety of vehicles. The following sections are devoted to passive safety of vehicles and aktive systems prevent the vehicle strikes a pedestrian. The last section describes the objectively examina the effectiveness of systems.
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Conventional and small modular reactors
Vintr, Lukáš ; Lisá, Hana (referee) ; Milčák, Pavel (advisor)
This thesis deals with nuclear energy. It contains a brief history of the development of this industry and provides insight into the process and control of the fission chain reaction used in nuclear reactors. It also describes conventional reactor types and the current state of their use in the world. It then mentions the research objectives set by the Generation IV International forum. Finally, it defines small modular reactors, describes a number of conceptual designs, and presents an analysis of the current state of their development, together with the possibilities of their use for the production of electricity or process heat.
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Passive Safety - Frontal Crash
Sendlerová, Kateřina ; Vančura, Jan (referee) ; Blaťák, Ondřej (advisor)
This bachelor thesis deals with passive safety, specifically passive safety in frontal crash. The thesis includes a research section in the field of passive safety, from history to a detailed description of the car body behaviour in the frontal crash. Accident rate with regards to the crew and pedestrian injuries is included as well. The result of this thesis is the measures proposal to improve passive safety in the traffic accidents not only of cars but the crew and pedestrians as well.
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Conventional and small modular reactors
Vintr, Lukáš ; Lisá, Hana (referee) ; Milčák, Pavel (advisor)
This thesis deals with nuclear energy. It contains a brief history of the development of this industry and provides insight into the process and control of the fission chain reaction used in nuclear reactors. It also describes conventional reactor types and the current state of their use in the world. It then mentions the research objectives set by the Generation IV International forum. Finally, it defines small modular reactors, describes a number of conceptual designs, and presents an analysis of the current state of their development, together with the possibilities of their use for the production of electricity or process heat.
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Vehicle Passive Safety Systems
Jelínek, Adam ; Rozsíval, Jan (referee) ; Blaťák, Ondřej (advisor)
This bachelor’s thesis of research nature deals with detailed description of passive safety features in modern cars and with characterization of these features in relation to electric and autonomous cars. Detailed structural and material description of car’s crumple zones and safety cage with description of car’s restraint systems is supplemented with historic background on development of these features. Final part of thesis gives reader an idea of application and necessary changes of these features when used on electric or autonomous cars.
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Vývoj aktivních a pasivních bezpečnostních prvků osobních automobilů
Kubín, Tomáš
In my bachelor thesis I deal with issues of active and passive safety of cars. In the introductory part I deal with the historical development of the safety of motor vehicles and the basic division of security elements. In the second part I present requirements for compliance with homologation regulations in the field of vehicle safety. In the next part the bachelor thesis focuses on the current elements of active and passive security. In the last part of my work, I describe the trends in passive safety of cars.
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