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Functional foams with densit ygradient
 Svatík, Juraj ; Figalla, Silvestr (oponent) ; Jančář, Josef (vedoucí práce)
Inspired by lightweight natural materials, cellular materials with gradient porosity are expected to possess mechanical properties superior to conventional polymer foams due to their specific structural architecture. These properties could allow use of the lightweight materials in structural components. In this thesis, preparation of the gradient cellular materials is investigated employing the laminating and/or 3D printing. Static and dynamic mechanical tests were performed on both quasi homogenous and gradient porosity foams providing experimental support for the hypothesis of structural architecture driven deformation response. Experimental data were interpreted using existing theoretical models. Our results led to a conclusion that the existing theoretical models derived for regularly structured foams are not valid for foams with gradient porosity exhibiting mechanical properties substantially better than the foams with homogenous porosity.
Úplný záznam
Functional foams with densit ygradient
 Svatík, Juraj ; Figalla, Silvestr (oponent) ; Jančář, Josef (vedoucí práce)
Inspired by lightweight natural materials, cellular materials with gradient porosity are expected to possess mechanical properties superior to conventional polymer foams due to their specific structural architecture. These properties could allow use of the lightweight materials in structural components. In this thesis, preparation of the gradient cellular materials is investigated employing the laminating and/or 3D printing. Static and dynamic mechanical tests were performed on both quasi homogenous and gradient porosity foams providing experimental support for the hypothesis of structural architecture driven deformation response. Experimental data were interpreted using existing theoretical models. Our results led to a conclusion that the existing theoretical models derived for regularly structured foams are not valid for foams with gradient porosity exhibiting mechanical properties substantially better than the foams with homogenous porosity.
Úplný záznam

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