Digital material laboratory: Wave propagation effects in open-cell aluminium foams
Artikel i vetenskaplig tidskrift, 2012

This paper is concerned with numerical wave propagation effects in highly porous media using digitized images of aluminium foam. Starting point is a virtual material laboratory approach. The aluminium foam microstructure is imaged by 3D X-ray tomography. Effective velocities for the fluid-saturated media are derived by dynamic wave propagation simulations. We apply a displacement-stress rotated staggered finite-difference grid technique to solve the elastodynamic wave equation. The used setup is similar to laboratory ultrasound measurements and computed results are in agreement with our experimental data. Theoretical investigations allow to quantify the influence of the interaction of foam and fluid during wave propagation. Together with simulations using an artificial dense foam we are able to determine the tortuosity of aluminium foam.

X-ray tomography

Wave propagation

Computational material physics

Aluminium foam

Finite-difference modeling


Erik H. Saenger

Eidgenössische Technische Hochschule Zürich (ETH)

David Uribe

Ruhr-Universität Bochum

Ralf Jänicke

Ruhr-Universität Bochum

Oscar Ruiz

Universidad EAFIT

Holger Steeb

Ruhr-Universität Bochum

International Journal of Engineering Science

0020-7225 (ISSN)

Vol. 58 115-123


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