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Microstructural Model of a Closed‐Cell Foam on the Basis of Image Analysis
Author(s) -
Fahlbusch NinaCarolin,
Becker Wilfried
Publication year - 2012
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201210086
Subject(s) - microstructure , representative elementary volume , finite element method , materials science , metal foam , boundary value problem , basis (linear algebra) , composite material , focus (optics) , image (mathematics) , structural engineering , geometry , computer science , mathematics , mathematical analysis , porosity , engineering , optics , artificial intelligence , physics
The focus of this work is the identification of a unit cell that is able to represent the microstructure of a closed‐cell solid foam to predict the effective behaviour of the foam numerically. For the investigation, a finite element model consisting of a repeating unit cell with periodical boundary conditions is implemented. A tetrakaidecahedral foam microstructure is considered as simplified cell geometry, and a strain‐energy based homogenisation concept is utilized. On the basis of image analysis imperfections are applied to the cell. The obtained model is used as a representative volume element (RVE) for further investigations of the postbuckling behaviour of the foams. Different analyses are performed and the results are compared to literature and experimental data. (© 2012 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)