Digital material laboratory: Wave propagation effects in open-cell aluminium foams
Fecha
2012-09
Autores
Saenger, E.H.
Uribe, D.
Jänicke, R.
Ruíz, O.
Steeb, H.
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Título de la revista
ISSN de la revista
0020-7225
Título del volumen
Editor
Elsevier
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Resumen
This paper is concerned with numerical wave propagation effects in highly porous media using digitized images of aluminum foam -- Starting point is a virtual material laboratory approach -- The Aluminum 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 fnite-difference grid technique to solve the elastodynamic wave equation -- The used setup is similar to laboratory ultrasound measurements and the 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 aluminum foam