Identification and characterisation of materials by broadband ultrasonic attenuation analysis

Hull, J.B.; Langton, Christian; Barker, Seth; Jones, Arthur R.

doi:10.1016/0924-0136(96)85100-4

Cited by 18 publications

(11 citation statements)

References 2 publications

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“…BUA parameter is commonly used in experimentations in the field of bioengineering applied to identify properties of bones [30] as differences between healthy bones and cancellous bones [31][32][33], and relationships between BUA parameter and porosity of bones [34], but there are some references of experimentations done in other materials. J.B Hull et al [35] made an important approach of BUA applied in the identification of polymer materials and porosity of ceramics. In this experimentation, they performed a relation of the attenuation versus frequency regression slope (BUA) with the time of flight of the ultrasound signal through the material to obtain Hull/Langton index (HL), used to make a comparison with porosity in ceramics measured with hydration test, resulting in a linear relationship of HL index increasing as the percentage of porosity in ceramics does.…”

Section: Introductionmentioning

confidence: 99%

Damage Detection Using Ultrasonic Techniques in Concrete-Filled Steel Tubes (CFSTs) Columns

Callejas

Palma

Hernández-Figueirido

et al. 2022

Sensors

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Concrete-filled steel tubes (CFSTs) are structural elements that, as a consequence of an incorrect elaboration, can exhibit internal defects that cannot be visualized, being usually air voids. In this work, the detection of internal damage in CFST samples elaborated with a percentage of contained air voids in concrete, was carried out by performing a complete ultrasound scan using an immersion tank. The analysis of the ultrasound signals shows the differences presented in the amplitude of the fundamental frequency of the signal, and in the Broadband Ultrasound Attenuation (BUA), in comparison with a sample without defects. The main contribution of this study is the application of the BUA technique in CFST samples for the location of air voids. The results present a linear relationship between BUA averages over the window of the CFSTs and the percentage of air voids contained (Pearson’s correlation coefficient r = 0.9873), the higher percentage of air voids, the higher values of BUA. The BUA algorithm could be applied effectively to distinguish areas with defects inside the CFSTs. Similar to the BUA results, the analysis in the frequency domain using the FFT and the STFT was sensitive in the detection of internal damage (Pearson’s correlation coefficient r = −0.9799, and r = −0.9672, respectively). The results establish an improvement in the evaluation of CFST elements for the detection of internal defects.

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Section: Introductionmentioning

confidence: 99%

Damage Detection Using Ultrasonic Techniques in Concrete-Filled Steel Tubes (CFSTs) Columns

Callejas

Palma

Hernández-Figueirido

et al. 2022

Sensors

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“…This technique consists of propagating a low amplitude waves through a material to measure the time of flight and any change of intensity for a given distance. It consequently allows determining the velocity and the absorption coefficient leading to deduce material properties (Gunarathne, Christidis, 2002;Aouzale et al, 2010;Hull et al, 1996;Shankar, 2001).…”

Section: Introductionmentioning

confidence: 99%

Archives of Acoustics

Soucrati

Chitnalah

Aouzale

et al. 2018

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This paper proposes an analytical model to describe the interaction of a bounded ultrasonic beam with an immersed plate. This model, based on the Gaussian beams decomposition, takes into account multiple reflections into the plate. It allows predicting three-dimensional spatial distributions of both transmitted and reflected fields. Thereby, it makes it easy to calculate the average pressure over the receiver's area taking into account diffraction losses. So the acoustical parameters of the plate can be determined more accurately. A Green's function for the interaction of an ultrasonic beam with the plate is derived. The obtained results are compared to those given by the angular spectrum approach. A good agreement is seen showing the validity of the proposed model.

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“…By this method, the amplitudes of successive back-wall echoes' screen height are used to determine attenuation. Using Roney's model [2,3], relation between ultrasonic attenuation and mean grain size can be determined. In the ultrasonic backscattering method, the frequency spectrum (frequency vs. amplitude plot) of two successive back-surface signals is obtained.…”

Section: Introductionmentioning

confidence: 99%

Mean Grain Size and Pore Effects οn Ultrasonic Properties οf WC-Fe-Ni and SiC-Fe-Ni Composites

et al. 2013

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In this work, electroless nickel plating technique was used with WCFe and SiCFe powders. Plated powders were sintered at temperature ranging from 600 • C to 1100 • C under argon shroud in Phoenix microwave furnace. The mean grain size is determined by using three dierent techniques namely ultrasonic velocity, ultrasonic attenuation, and rate of screen heights of successive peaks according to the pulse-echo method by using a 2 MHz and a 4 MHz probes compared with the scanning electron microscopy images. In addition, the relative eects of porosity on ultrasonic attenuation and velocity in the WCFeNi and SiCFeNi composite samples are studied. It is seen that the ultrasonic velocity, the ultrasonic attenuation, the rate of screen heights of successive peaks have a linear relation with the mean grain size of samples. However, the correlation coecients of porosity graphs have higher values than mean grain size graphs for the composite materials as expected. This indicates that porosity determines the ultrasonic velocity and attenuation for the composite samples.

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Identification and characterisation of materials by broadband ultrasonic attenuation analysis

Cited by 18 publications

References 2 publications

Damage Detection Using Ultrasonic Techniques in Concrete-Filled Steel Tubes (CFSTs) Columns

Damage Detection Using Ultrasonic Techniques in Concrete-Filled Steel Tubes (CFSTs) Columns

Archives of Acoustics

Mean Grain Size and Pore Effects οn Ultrasonic Properties οf WC-Fe-Ni and SiC-Fe-Ni Composites

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