Broadband ultrasonic backscattering applied to nondestructive characterization of materials

Kruger, S. E.; Rebello, J. M. A.; Charlier, Jacques

doi:10.1109/tuffc.2004.1320742

Cited by 16 publications

(7 citation statements)

References 15 publications

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“…Der gemessene effektive Dämpfungsfaktor ist im Wesentlichen das Resultat von vier Dämpfungsmechanismen: der thermischen Partikelpulsation, der visko-inertialen Oszillation, der Absorption und der Streuung an den Partikeln. Die Herausforderung besteht darin, mit adäquaten Modellen [11][12][13][14][15][16][17][18] Aufgrund der erheblichen Schalldämpfung ist es bei hoch konzentrierten Stoffsystemen erforderlich, den Abstand zwischen Sende-und Empfangswandler hinreichend klein zu gestalten, um ein noch auswertbares Messsignal zu erhalten. Entsprechend sind die Extinktionsverfahren meist auf Bypass-Anwendungen beschränkt und führen beim Anwender nur zu geringer Akzeptanz.…”

Section: Ultraschall-methodenunclassified

P3.1 - Inline-Analyse der Dispergiergüte von Kunststoff- Compounds

Wöckel¹,

Arndt²,

Steinmann³

2015

Tagungsband

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Section: Ultraschall-methodenunclassified

P3.1 - Inline-Analyse der Dispergiergüte von Kunststoff- Compounds

Wöckel¹,

Arndt²,

Steinmann³

2015

Tagungsband

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“…Dadurch kann analog zu medizinischen und werkstofftechnischen US-Anwendungen auf einen Messspalt verzichtet werden [1,2]. Besteht die Notwendigkeit, direkt in hochkonzentrierten Dispersionen (> einige Vol.-%) zu messen, ist der Einsatz etablierter optischer Methoden begrenzt.…”

Section: Problemstellungunclassified

Particle Characterization within Highly Concentrated Dispersions – Fundamental Studies of a New Ultrasound Method

Weser

Wessely

Wöckel

et al. 2013

Chemie Ingenieur Technik

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Es wird eine neue Methode zur inlinefähigen Partikelcharakterisierung in hochkonzentrierten Dispersionen mittels Ultraschallrückstreuung vorgestellt, die sensitiv gegenüber der Partikelgröße und der Konzentration ist. Eine Analyse der Ultraschallrückstreusignale liefert neben der Schalldämpfung zusätzlich ein Maß für die Streuintensität. Die Messung kann ohne Probenahme und minimalinvasiv direkt im Prozess erfolgen.A new method for inline characterization of particles in high concentrated dispersions by ultrasonic backscattering is described, that is sensitive against particle size and concentration. Analyzing the backscattering signal yields the sound attenuation as well as a scattering intensity equivalent. The measurement can be performed without sampling and minimally invasive directly in the process.

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“…This attenuation mechanism is commonly accepted as the most important in heterogeneous materials, such as the case of cast iron [10] to [13]. It is important to take into account the fact that the scattering effects of the matrix grains are too small when compared to the nodular scattering effects and can be ignored [6], [7], [14] to [16].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Scattering Attenuation in Nodular Cast Iron: Experimental and Simulation Studies

Santos

2021

SV-JME

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This work evaluates the ultrasonic scattering attenuation of structures with complex scatterer distributions via experimental and simulation studies. The proposed approach uses experimental attenuation knowledge to infer the scatterer size and its concentration in the studied structures, which are important for the effective construction of simulated models. The MATLAB k-Wave toolbox has been used to implement the simulator. Several cast-iron samples have been used to demonstrate the importance of simulation in the characterization of such structures. First, the scattering attenuation was evaluated using the Truell and Papadakis models, and then the results were compared with experimental ones. Emphasis was given to the Papadakis approach because it takes into account the scatterer size distribution. It is demonstrated that both analytical models provide results that are far from the experimental ones. The developed simulator for the studied samples led to a predictive model, in which the attenuation was proportional to the fifth power of the scatterer size, and the corresponding formulation is close to the one proposed by the analytical models.

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Broadband ultrasonic backscattering applied to nondestructive characterization of materials

Cited by 16 publications

References 15 publications

P3.1 - Inline-Analyse der Dispergiergüte von Kunststoff- Compounds

P3.1 - Inline-Analyse der Dispergiergüte von Kunststoff- Compounds

Particle Characterization within Highly Concentrated Dispersions – Fundamental Studies of a New Ultrasound Method

Ultrasonic Scattering Attenuation in Nodular Cast Iron: Experimental and Simulation Studies

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