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Properties and the Use of Metal Foams
Křivánek, Robin ; Liškutín, Petr (referee) ; Němec, Karel (advisor)
In this thesis are summarized the findings of metal foams, with prevailing constraints on aluminum foam, because in them hides the greatest potential. The first part is described the production of porous materials, especially the way of floam production by thermal decomposition of floaming agent and melt gas injection. There are also written stress tests to gain a deeper knowledge of their properties, but also the latest exploring methods of foams, such as using a radioscopiy and CT scanner from which then creates a voxel model of foam. They are summarized here the basic ways of processing. Finally we must mention the possibility of using these materials with a focus on commercially produced foams Alporas® and Duocel®. Mass using foams mainly prevents high production costs and in some cases difficult reproducibility of properties.
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Formula Student Car Safety Components Design
Martinec, Pavel ; Svída, David (referee) ; Ramík, Pavel (advisor)
The subject of this thesis is to design safety components for the Formula Student car. The aim is to handle the driver’s safety proposals regarding the competition rules. The main point of interest is focused on the impact attenuator issue, which is designed and tested by appropriate method. In addition are designed other security features such as seat belts, seat belts installation and driver equipment are.
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Formula Student Impact Attenuator Design
Bilík, Michal ; Dundálek, Radim (referee) ; Ramík, Pavel (advisor)
This diploma thesis deals with Formula Student Impact Attenuator design. The aim of the thesis is to select suitable material and put it to the test of deformation. From results to suggest dimensions of Impact Attenuator and then perform its test. Next aim of the thesis is to perform FEM analysis of Anti-Intrusion plate and supporting rack.
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Formula Student Impact Attenuator Design
Bilík, Michal ; Dundálek, Radim (referee) ; Ramík, Pavel (advisor)
This diploma thesis deals with Formula Student Impact Attenuator design. The aim of the thesis is to select suitable material and put it to the test of deformation. From results to suggest dimensions of Impact Attenuator and then perform its test. Next aim of the thesis is to perform FEM analysis of Anti-Intrusion plate and supporting rack.
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Formula Student Car Safety Components Design
Martinec, Pavel ; Svída, David (referee) ; Ramík, Pavel (advisor)
The subject of this thesis is to design safety components for the Formula Student car. The aim is to handle the driver’s safety proposals regarding the competition rules. The main point of interest is focused on the impact attenuator issue, which is designed and tested by appropriate method. In addition are designed other security features such as seat belts, seat belts installation and driver equipment are.
|
|
|
Properties and the Use of Metal Foams
Křivánek, Robin ; Liškutín, Petr (referee) ; Němec, Karel (advisor)
In this thesis are summarized the findings of metal foams, with prevailing constraints on aluminum foam, because in them hides the greatest potential. The first part is described the production of porous materials, especially the way of floam production by thermal decomposition of floaming agent and melt gas injection. There are also written stress tests to gain a deeper knowledge of their properties, but also the latest exploring methods of foams, such as using a radioscopiy and CT scanner from which then creates a voxel model of foam. They are summarized here the basic ways of processing. Finally we must mention the possibility of using these materials with a focus on commercially produced foams Alporas® and Duocel®. Mass using foams mainly prevents high production costs and in some cases difficult reproducibility of properties.
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On the modelling of compressive response of closed-cell aluminium foams under high-strain rate loading
Koudelka_ml., P. ; Zlámal, Petr ; Fíla, Tomáš
Porous metals and particularly aluminium foams are attractive materials for crash applications where constructional elements have to be able to absorb considerable amount of deformation energy while having as low weight as possible. Compressive behaviour for medium impact velocities can be experimentally assessed from a series of droptower impact tests instrumented with accelerometer and high-speed camera. However to predict such behaviour a proper modelling scheme has to be developed. In this paper droptower impact tests of Alporas aluminium foam were used for development of a material model for explicit finite element simulations of high-strain rate deformation process using LS-DYNA simulation environment. From the material models available low density foam, Fu-Chang’s foam, crushable foam and modified crushable foam models were selected for simulations using smoothed-particle hydrodynamics and solid formulations respectively. Numerical simulations were performed in order to assess constitutive parameters of these models and identify material model describing deformation behaviour of Alporas with the best accuracy.
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