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Homogenization of open foam structures using Kelvin cell
Barančík, Milan ; Navrátil, Petr (referee) ; Skalka, Petr (advisor)
The bachelor thesis deals with homogenization of open foam structures using Kelvin cell. A computational model of the foam structure was created and converted into a computational model of solid with corresponding material characteristics in ANSYS software. Subsequently, a parametric study of the effect of Kelvin cell proportions on solid material characteristics was done. The output of the study was a generalization of the dependence of solid material characteristics on Kelvin cell proportions. Lastly, the suitability of the generalization was verified and achievements were evaluated.
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Determination of the elastic characteristics of highly-porous materials by means of the impulse excitation technique
Kollmann, Marek ; Lošák, Petr (referee) ; Ševeček, Oldřich (advisor)
The bachelor thesis dealt with the application of pulse excitation technique (IET) to determine the elastic characteristics of highly-porous materials. The first part explained the principle of this method together with the arguments for use outside the conditions given by the standard. In the next part, a model of foam structure with open porosity based on Kelvin cell was created in ANSYS software. The influence of porosity and cell size on its elastic characteristics was determined on the model. It was showed to agree with the theory according to Gibson and Ashby. The result of the work was the evaluation of the possibility of using IET to determine these characteristics, these results were then compared with the experimental values. It turned out that the IET provides the correct information about the stiffness of the model.
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Determination of the elastic characteristics of highly-porous materials by means of the impulse excitation technique
Kollmann, Marek ; Lošák, Petr (referee) ; Ševeček, Oldřich (advisor)
The bachelor thesis dealt with the application of pulse excitation technique (IET) to determine the elastic characteristics of highly-porous materials. The first part explained the principle of this method together with the arguments for use outside the conditions given by the standard. In the next part, a model of foam structure with open porosity based on Kelvin cell was created in ANSYS software. The influence of porosity and cell size on its elastic characteristics was determined on the model. It was showed to agree with the theory according to Gibson and Ashby. The result of the work was the evaluation of the possibility of using IET to determine these characteristics, these results were then compared with the experimental values. It turned out that the IET provides the correct information about the stiffness of the model.
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Homogenization of open foam structures using Kelvin cell
Barančík, Milan ; Navrátil, Petr (referee) ; Skalka, Petr (advisor)
The bachelor thesis deals with homogenization of open foam structures using Kelvin cell. A computational model of the foam structure was created and converted into a computational model of solid with corresponding material characteristics in ANSYS software. Subsequently, a parametric study of the effect of Kelvin cell proportions on solid material characteristics was done. The output of the study was a generalization of the dependence of solid material characteristics on Kelvin cell proportions. Lastly, the suitability of the generalization was verified and achievements were evaluated.
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