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FEA crash test of a LEGO® passenger car model
Barančoková, Zoja ; Řehák, Kamil (referee) ; Dlugoš, Jozef (advisor)
This master’s thesis deals with a FEA crash test of a LEGO® Ferrari 812 Competizione model. There are many parameters that must be considered in the calculation of FEA crash test of vehicles. LEGO® models offer the possibility to analyse this phenomenon with a lower number of input variables and create FEA crash test in which the disconnection of the LEGO® brick will be the same as in real-life crash test. The first step was the creation and discretization of CAD models of individual LEGO® bricks from which the LEGO® model is composed. The most important part was the definition of normal and shear failure forces in contact card *CONTACT_TIEBREAK_NODES_ONLY, ensuring the disconnection of the LEGO® bricks during simulation of crash test, which was implemented in LS-DYNA software. Additionally, experimental measurements were taking place to measure the loading forces which are needed to disconnect two LEGO® bricks. For this experiment were chosen the most used types of contact of the LEGO® bricks which are found in selected LEGO® model. Results of FEA crash tests were compared with a series of real-life crash tests that were done by accelerated linear motion of used and new LEGO® models. The accelerated linear motion was achieved by putting the model on a tilted surface, 1 m, and 1,6 m from the crash barrier. After comparing the results, the parameters of contact failure had to be modified to ensure a closer match of LEGO® bricks disconnection between FEA crash test and real-life crash test.
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Design of Vehicle Steering
Barančoková, Zoja ; Rozsíval, Jan (referee) ; Blaťák, Ondřej (advisor)
This bachelor thesis primarily deals with the design of vehicle steering, as it forms one of the most important elements of the overall vehicle. The steering must meet certain safety requirements and nowadays, the driver’s driving comfort is already seen as an essential part of it. This work contains the basic kinematic settings and a summary of the individual constructional components together with their functions. To ensure the correct control of the vehicle on the road, the correct setting of the dynamic part of the steering is also necessary. Bearing in mind the electronic equipment of the vehicle that made its way into spotlight, the thesis also explains principles of the systems operations that every modern vehicle already contains. Finally, the types of gearboxes and power steering which this year’s passenger and commercial vehicles are equipped with are summarized. Based on the acquired knowledge, a prediction of the future development of the vehicle driving is presented.
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Design of Vehicle Steering
Barančoková, Zoja ; Rozsíval, Jan (referee) ; Blaťák, Ondřej (advisor)
This bachelor thesis primarily deals with the design of vehicle steering, as it forms one of the most important elements of the overall vehicle. The steering must meet certain safety requirements and nowadays, the driver’s driving comfort is already seen as an essential part of it. This work contains the basic kinematic settings and a summary of the individual constructional components together with their functions. To ensure the correct control of the vehicle on the road, the correct setting of the dynamic part of the steering is also necessary. Bearing in mind the electronic equipment of the vehicle that made its way into spotlight, the thesis also explains principles of the systems operations that every modern vehicle already contains. Finally, the types of gearboxes and power steering which this year’s passenger and commercial vehicles are equipped with are summarized. Based on the acquired knowledge, a prediction of the future development of the vehicle driving is presented.
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