Experimental evaluation of phase velocities and tortuosity in fluid saturated highly porous media

Gueven, Ibrahim; Kurzeja, Patrick; Luding, Stefan; Steeb, Holger

doi:10.1002/pamm.201210189

Cited by 8 publications

(1 citation statement)

References 5 publications

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“…In this work, where ultrasonic transmission techniques are used, the received signal is much more complex due to the inhomogeneous porosity and lack of interconnected pores, which are the main characteristics of the studied foam [11,12]. The received signal results from the ultrasound propagation in the aluminum through different paths around the pores.…”

Section: Introductionmentioning

confidence: 99%

Advanced nondestructive techniques applied for the detection of discontinuities in aluminum foams

Katchadjian

García

Brizuela

et al. 2018

AIP Conference Proceedings

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Abstract. Metal foams are finding an increasing range of applications by their lightweight structure and physical, chemical and mechanical properties. Foams can be used to fill closed moulds for manufacturing structural foam parts of complex shape [1]; foam filled structures are expected to provide good mechanical properties and energy absorption capabilities. The complexity of the foaming process and the number of parameters to simultaneously control, demand a preliminary and hugely wide experimental activity to manufacture foamed components with a good quality. That is why there are many efforts to improve the structure of foams, in order to obtain a product with good properties. The problem is that even for seemingly identical foaming conditions, the effective foaming can vary significantly from one foaming trial to another. The variation of the foams often is related by structural imperfections, joining region (foam-foam or foam-wall mold) or difficulties in achieving a complete filling of the mould. That is, in a closed mold, the result of the mold filling and its structure or defects are not known a priori and can eventually vary significantly. These defects can cause a drastic deterioration of the mechanical properties [2] and lead to a low performance in its application. This work proposes the use of advanced nondestructive techniques for evaluating the foam distribution after filling the mold to improve the manufacturing process. To achieved this purpose ultrasonic technique (UT) and cone beam computed tomography (CT) were applied on plate and structures of different thicknesses filled with foam of different porosity. UT was carried out on transmission mode with low frequency air-coupled transducers [3], in focused and unfocused configurations.

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Section: Introductionmentioning

confidence: 99%

Advanced nondestructive techniques applied for the detection of discontinuities in aluminum foams

Katchadjian

García

Brizuela

et al. 2018

AIP Conference Proceedings

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Numerical study to investigate the viscous characteristic length on reconstructed porous media

Szűcs

2023

Alexandria Engineering Journal

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Exploring the impact of compressibility on reconstructed porous materials: A numerical study

Szűcs

2024

Journal of Engineering Research

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Experimental evaluation of phase velocities and tortuosity in fluid saturated highly porous media

Cited by 8 publications

References 5 publications

Advanced nondestructive techniques applied for the detection of discontinuities in aluminum foams

Advanced nondestructive techniques applied for the detection of discontinuities in aluminum foams

Numerical study to investigate the viscous characteristic length on reconstructed porous media

Exploring the impact of compressibility on reconstructed porous materials: A numerical study

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