Circumferential Guided Waves for Defect Detection in Coated Pipe

Luo, Wei; Rose, Joseph L.; Velsor, Jason K. Van; Avioli, Michael J.; Spanner, Jack

doi:10.1063/1.2184525

Cited by 19 publications

(15 citation statements)

References 1 publication

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“…Shear horizontal modes have been investigated for performing circumferential examinations of tarcoated piping (Luo et al 2006). It is noted that the axial extent of the inspection is limited by the axial footprint of the piezoelectric transducers used for inspection.…”

Section: 45mentioning

confidence: 99%

“…The system employed a dual-transducer, pitchcatch arrangement using the A1 extensional plate mode. The transducers were separated circumferentially such that no flaw could simultaneously be in the 180° blind spot observed in the studies by Luo et al (2006). This technique was explored to address inspection of pipelines for several process industries and, more specifically, pipelines in or near marine environments that are subject to crevice corrosion where the piping is in contact with support brackets.…”

Section: 45mentioning

confidence: 99%

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Review of NDE Methods for Detection and Monitoring of Atmospheric SCC in Welded Canisters for the Storage of Used Nuclear Fuel

Meyer

Pardini

Hanson

et al. 2013

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Dry cask storage systems (DCSSs) for used nuclear fuel were originally envisioned for storage periods of short duration (approximately a few decades). However, uncertainty challenges the opening of a permanent repository for used nuclear fuel, implying that used nuclear fuel will need to remain in dry storage for much longer durations than originally envisioned. Thus, aging degradation of DCSSs becomes an issue that may not have been sufficiently considered in the design phase and that can challenge the efficacy of very long-term storage of used nuclear fuel.

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Section: 45mentioning

confidence: 99%

Section: 45mentioning

confidence: 99%

Review of NDE Methods for Detection and Monitoring of Atmospheric SCC in Welded Canisters for the Storage of Used Nuclear Fuel

Meyer

Pardini

Hanson

et al. 2013

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“…Given that the height of the waveform is one vital factor for feature detection and classification, a correction procedure becomes necessary. According to [8], the amplitude of the propagating wave signal is a function of frequency and wave propagation distance:…”

Section: B Waveform Transformation and Correctionmentioning

confidence: 99%

Flaw classification in ultrasonic guided waves signal using Wavelet Transform and PNN classifier

Zhang

Sun

Liu

et al. 2011

2011 International Conference on Wireless Communications and Signal Processing (WCSP)

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In this paper, a synthesized algorithm for flaw classification in ultrasonic guided waves signal is presented, in which Wavelet Transform is utilized in the process of noise suppression and envelop extraction, and the Probabilistic Neural Network (PNN) is introduced for flaw classification of the ultrasonic testing signal. Besides, in the process of feature extraction, the necessity of attenuation correction and feature selection of ultrasonic signal is discussed. The comparison of the performances of PNN and BP classifier is made in the last chapter, which demonstrates that the performance of flaw classification is significantly improved by the synthesized algorithm presented in this paper.

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“…There are, however, the dispersion spectra available in pipes of all isotropic layers. Recently Luo et al 7 have obtained theoretical dispersion of shear harmonic circumferential waves in an N-layered pipe made of isotropic visco-elastic materials making use of correspondence principle. They presented numerical results in a-isotropic-elastic and isotropic visco-elastic-two layer pipe.…”

Section: A Plane Strain Circumferential Waves: Mode Dispersion Spectmentioning

confidence: 99%

Dispersion of circumferential waves in cylindrically anisotropic layered pipes in plane strain

Vasudeva

Sudheer

Vema

2008

The Journal of the Acoustical Society of America

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Dispersion spectra of circumferential waves along the periphery of circular pipes made of layered anisotropic materials do not seem to be available in literature. This note attempts to partially fill this gap by providing the dispersion spectra in two and three layered cylindrically anisotropic pipes in plane strain motion. The spectra for pipes executing time harmonic vibrations in plane strain condition are obtained as roots of a numerical characteristic equation derived extending a weighted residual method of solution of the governing equations for a single layer pipe [Towfighi et al., J. Appl. Mech. 69, 283-291 (2002)] to a general N layered pipe. The anisotropic elastic coefficients are considered to be independent of position coordinates and the bond condition at interfaces of the layers is assumed to be perfect. Numerical illustrations are presented for two and three layered pipes with anisotropy directions differing in adjacent layers. Increase in curvature of the pipe and inclination of the fiber orientation in the outermost layers to propagation direction are factors that seem to influence the mode number and pattern within the limited examples worked out.

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Circumferential Guided Waves for Defect Detection in Coated Pipe

Cited by 19 publications

References 1 publication

Review of NDE Methods for Detection and Monitoring of Atmospheric SCC in Welded Canisters for the Storage of Used Nuclear Fuel

Review of NDE Methods for Detection and Monitoring of Atmospheric SCC in Welded Canisters for the Storage of Used Nuclear Fuel

Flaw classification in ultrasonic guided waves signal using Wavelet Transform and PNN classifier

Dispersion of circumferential waves in cylindrically anisotropic layered pipes in plane strain

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