Mechanical Behavior of Aluminum Foam Under Uniaxial Compression

  1. B. Jouffrey
  1. B. Kriszt,
  2. B. Foroughi,
  3. A. Kottar and
  4. H.P. Degischer

Published Online: 9 MAY 2006

DOI: 10.1002/3527606165.ch12

Microstructural Investigation and Analysis, Volume 4

Microstructural Investigation and Analysis, Volume 4

How to Cite

Kriszt, B., Foroughi, B., Kottar, A. and Degischer, H.P. (2000) Mechanical Behavior of Aluminum Foam Under Uniaxial Compression, in Microstructural Investigation and Analysis, Volume 4 (ed B. Jouffrey), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606165.ch12

Author Information

  1. Institute of Material Science and Testing, Vienna University of Technology, Vienna, Austria

Publication History

  1. Published Online: 9 MAY 2006
  2. Published Print: 20 APR 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301218

Online ISBN: 9783527606160

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Keywords:

  • microstructural investigation;
  • metal matrix composites;
  • aluminum foam;
  • mechanical behavior;
  • uniaxial compression

Summary

The deformation behavior of different types of closed cell aluminum foam is studied, considering the local density. Experimental results of compression tests indicate that significant in-homogeneities in the density distribution might be the key factor in determining the mechanical behavior of foams. Deformation bands were found in all foamed samples. Strengthening and softening of the foam, which was observed in stress-strain curves, can be related to the formation of macroscopic deformation bands. Depending on the composition and the micro-structure of the cell wall material, cells undergo either ductile collapse or brittle fracture, which influences the macroscopic behavior of Al foam significantly.

A three dimensional (3D) finite element (FE) analysis, which allows to simulate the behavior of samples for small deformation, is presented. The foam material is represented by a continuum, consisting of sub-regions having different material properties. These material properties depend on the density of the sub-regions. Hooke's law is applied for the elastic deformation and von Mises criterion for small plastic deformation. The developed model has been implemented within the finite element code ABAQUS. Experimental data are compared with results of the presented model.