Digital material laboratory: Wave propagation effects in open-cell aluminium foams

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

• Autores: Saenger, E.H.; Uribe, D.; Jänicke, R.; Ruíz, O.; Steeb, H.
• Fecha de publicación: 2012
• Institución: Universidad EAFIT
• Repositorio: Repositorio EAFIT
• Idioma: eng
• OAI Identifier: oai:repository.eafit.edu.co:10784/9679
• Acceso en línea: http://hdl.handle.net/10784/9679
• Palabra clave: PROPAGACIÓN DE ONDAS; TOMOGRAFÍA COMPUTARIZADA POR RAYOS X; POROSIDAD; PERMEABILIDAD; MATERIALES POROSOS; LABORATORIOS DE INGENIERÍA; ULTRASONIDO; PROCESAMIENTO DIGITAL DE IMÁGENES; Wave propagation; Tomography, X-ray computed; Porosity; Permeability; Porous materials; Engineering laboratories; Ultrasonics; Image processing - Digital techniques; Wave propagation; Tomography; X-ray computed; Porosity; Permeability; Porous materials; Engineering laboratories; Ultrasonics; Image processing - Digital techniques; Modelado geométrico; Espumas de aluminio; Modelos computacionales
• License: Acceso abierto