The effect of cell-size dispersity on the mechanical properties of closed-cell aluminum foam

Bo Yuan Su, Chun Min Huang, Hao Sheng, Wen-Yea Jang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The mechanical properties of open-celled and closed-celled metallic foam are strongly influenced by the cellular microstructure and material properties of the base material from which the foam is made. The present study investigated the microstructure and mechanical properties of ALPORAS closed-cell Al foam. In particular, the effect of cell-size dispersity on the Young's modulus of foam was investigated through crushing experiments and numerical simulations. Crushing experiments were first conducted on two mutually perpendicular directions. Numerical models of varying cell-size dispersity and complexity were subsequently developed, including the monodispersed model that is based on the Kelvin structure, the bidispersed model, and the polydispersed model that is based on the random Laguerre tessellation algorithm. The numerical models were discretized using shell elements, and the simulations were conducted using the ABAQUS finite element method software. Relative Young's moduli with various relative densities were predicted, and the numerical convergence on the model size was studied accordingly. Numerical results obtained from all three numerical models developed were found to overestimate the experimental results by a factor of approximately 3. The difference between the numerical and experimental results can be attributed to the difference in detailed microstructural characteristics. Furthermore, the difference among numerical results obtained from the three models was insignificant.

Original languageEnglish
Pages (from-to)203-213
Number of pages11
JournalMaterials Characterization
Volume135
DOIs
StatePublished - 1 Jan 2018

Keywords

  • ABAQUS
  • Cell-size dispersity
  • Closed-cell foam
  • Laguerre tessellation
  • Mechanical properties
  • Numerical simulation

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