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.

Computational material physics

Wave propagation

Aluminium foam

Finite-difference modeling

X-ray tomography


Erik H. Saenger

David Uribe

Ralf Jänicke

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Oscar Ruiz

Holger Steeb

International Journal of Engineering Science

0020-7225 (ISSN)

Vol. 58 115-123


Teknisk mekanik