MODELING OF MACROSCOPIC ELASTIC PROPERTIES OF ALUMINIUM FOAM

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F12%3A00193353" target="_blank" >RIV/68407700:21110/12:00193353 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

MODELING OF MACROSCOPIC ELASTIC PROPERTIES OF ALUMINIUM FOAM

Popis výsledku v původním jazyce

This paper is focused on the prediction of macroscopic elastic properties of highly porous aluminium foam. The material is characterized by a closed pore system with very thin pore walls and large air pores. Intrinsic material properties of cell wall constituents are assessed with nanoindentation whereas analytical homogenizations are employed for the assessment of the cell wall elastic properties. Very good agreement was found between the various analytical estimates. Two-dimensional microstructural FEM model was applied to obtain effective elastic properties of the upper material level. for which the Young's modulus reached 1.11 GPa. The value is by ~30% lower than the range of experimental values obtained from experimental compression tests. It follows from the 2-D approximation that the 2-D model underestimates the stiffness, by ~30% compared to the real case constrained in 3-D. Therefore, more appropriate 3-D model based on microCT data will be prepared in the future work.

Název v anglickém jazyce

MODELING OF MACROSCOPIC ELASTIC PROPERTIES OF ALUMINIUM FOAM

Popis výsledku anglicky

This paper is focused on the prediction of macroscopic elastic properties of highly porous aluminium foam. The material is characterized by a closed pore system with very thin pore walls and large air pores. Intrinsic material properties of cell wall constituents are assessed with nanoindentation whereas analytical homogenizations are employed for the assessment of the cell wall elastic properties. Very good agreement was found between the various analytical estimates. Two-dimensional microstructural FEM model was applied to obtain effective elastic properties of the upper material level. for which the Young's modulus reached 1.11 GPa. The value is by ~30% lower than the range of experimental values obtained from experimental compression tests. It follows from the 2-D approximation that the 2-D model underestimates the stiffness, by ~30% compared to the real case constrained in 3-D. Therefore, more appropriate 3-D model based on microCT data will be prepared in the future work.

Druh

D - Stať ve sborníku

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

<a href="/cs/project/GAP105%2F12%2F0824" target="_blank" >GAP105/12/0824: Stanovení strukturálních a mechanických vlastností kovových pěn pomocí nanoindentace, mikrostrukturálních MKP modelů a mechanických zkoušek</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Engineering Mechanics 2012

ISBN

978-80-86246-39-0

ISSN

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e-ISSN

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Počet stran výsledku

2

Strana od-do

176-177

Název nakladatele

Institute of Theoretical and Applied Mechanics Academy of Sciences of the Czech Republic

Místo vydání

Prague

Místo konání akce

Svratka

Datum konání akce

14. 5. 2012

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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