TWO-SCALE MODEL FOR PREDICTION OF MACROSCOPIC ELASTIC PROPERTIES OF ALUMINIUM FOAM USING NANOINDENTATION

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F12%3A00197693" target="_blank" >RIV/68407700:21110/12:00197693 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

TWO-SCALE MODEL FOR PREDICTION OF MACROSCOPIC ELASTIC PROPERTIES OF ALUMINIUM FOAM USING NANOINDENTATION

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 ranges from 1.11 GPa to 1.4 GPa depending on the size of the evaluated area. The estimated range of values was lower in comparison with experimental results obtained from experimental compression tests. It follows from the 2-D approximation that the 2-D model underestimates the stiffness, compared to the real case constrained in 3-D. Therefore, more appropriate 3-D model b

Název v anglickém jazyce

TWO-SCALE MODEL FOR PREDICTION OF MACROSCOPIC ELASTIC PROPERTIES OF ALUMINIUM FOAM USING NANOINDENTATION

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 ranges from 1.11 GPa to 1.4 GPa depending on the size of the evaluated area. The estimated range of values was lower in comparison with experimental results obtained from experimental compression tests. It follows from the 2-D approximation that the 2-D model underestimates the stiffness, compared to the real case constrained in 3-D. Therefore, more appropriate 3-D model b

Druh

O - Ostatní výsledky

CEP obor

JI - Kompositní materiály

OECD FORD obor

—

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