Guided ultrasonic waves propagation imaging: a review

Chia, Chen Ciang; Lee, Shi Yn; Harmin, Mohammad Yazdi; Choi, Yong Jun; Lee, Jung-Ryul

doi:10.1088/1361-6501/acae27

Cited by 22 publications

(5 citation statements)

References 388 publications

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“…This is a newly developed subject in the field of non-destructive monitoring [1]. In the past 30 years, the literature on ultrasonic guided waves has increased in amount significantly and the discussed research fields have covered pipes, solid cylinders, composite plates, and more [2,3]. In the petrochemical and transportation industries, cylindrical constructions such as rods and pipes are commonly used.…”

Section: Introductionmentioning

confidence: 99%

Damage Monitoring of Steel Bars Based on Torsional Guided Waves

Zheng,

Zhang,

Huang

2024

Sensors

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Ultrasonic guided waves represent a new development in the field of non-destructive testing. Longitudinal guided waves are mostly used to monitor the damage of steel bars, but the received signal is usually degraded and noisy owing to its dispersive propagation and multimodal behavior, making its implementation and location challenging. The torsional mode of T (0, 1) is not dispersive in the propagation of a steel bar and only produces circumferential displacement. It was chosen, in this study, to conduct guided wave-based damage monitoring on steel bars to reduce the signal processing complexity. The defects of steel bars, including circular surface defects, internal defects, and uniform damage defects, were thoroughly investigated, respectively, using numerical simulation. The waves were excited and received using the pitch-and-catch technique and the collected monitoring signals were processed using Hilbert transformation to highlight the amplitude and time-of-flight values of the wave signals, which were used for defect identification. In this paper, the reflectivity of guided waves is compared between torsional waves and longitudinal waves, in each case. The impact of defect size changes on damage monitoring is studied and the sensitivity of both the wave frequency and the wave mode (L and T) is also discussed. The results show that the monitoring method based on the torsional wave T (0, 1) is more sensitive to surface defects than the conventional method based on longitudinal waves. The reflectivity of the torsional wave T (0, 1) can be twice that of the longitudinal wave L (0, 1) when the depth of the defect in the circumferential grooves is less than 50% of the diameter of the steel bar. It is more sensitive to shallow surface defects within half of the bar’s radius, and it can also effectively identify defects under the conditions of the uniform damage defects of steel bars, even when the measurements are heavily noise-polluted. This proves the superiority of the torsional guided wave T (0, 1) in defect monitoring and provides a theoretical basis for the application of the torsional guided wave T (0, 1) in actual monitoring.

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Section: Introductionmentioning

confidence: 99%

Damage Monitoring of Steel Bars Based on Torsional Guided Waves

Zheng,

Zhang,

Huang

2024

Sensors

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“…However, due to the complexity of wave propagation in honeycomb sandwich structures, there are few papers for water ingress detection using laser-ultrasonic visualizing technique. 18 Therefore, this study focuses on establishing an active method for accurately detecting water ingress in honeycomb sandwich structures using laser ultrasonics.…”

Section: Introductionmentioning

confidence: 99%

Water ingress detection in an aluminum honeycomb sandwich structure using laser ultrasonics based on mode conversion behaviors

Dong,

Chen,

Saito

et al. 2023

Jnl of Sandwich Structures & Materials

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This paper investigates the method for water ingress detection in an aluminum honeycomb sandwich structure by laser ultrasonics. To clarify the propagation of Scholte waves generated at the solid-liquid interface, the theoretical dispersion curves in the water-aluminum layered structure are calculated by the global matrix method. Using a laser ultrasonic visualizing inspector, the guided wave propagation in the wavefields has been visualized, which shows the mode conversion behaviors occurring in the water ingress area. The clarification of mode conversion is then investigated by the finite element method. The Scholte modes at the solid-fluid interface and the Lamb modes in the face sheet are interconverted because of the change in the waveguide structure. Wavenumber filter reconstruction and the resulting energy maps are applied to illustrate the mode conversion in the wavefields and to detect the water ingress area. Results show that the appearance of the water layer contributes to the mode conversion behaviors during the guided wave propagation in the honeycomb sandwich structure, which offers the potential for water ingress detection based on the mode conversion behaviors.

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“…The Lamb waves, which propagate within structures, are a well-known technique for Non-Destructive Testing (NDT) and Structural Health Monitoring (SHM) [1][2][3]. There are two groups of dispersive modes of Lamb waves: symmetric S n and anti-symmetric A n [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…However, the real-time testing of objects remains a complex and challenging task due to the multi-modal nature, dispersive phenomenon, multi-path characteristics of Lamb waves and sensitivity to environmental and operational conditions (EOCs) parameters [6][7][8]. Thus, one of the main reasons that complicates the application of these waves is the dispersion phenomenon [2,4,9]. The non-stationary Lamb wave signal packets consist of frequency components that propagate at different velocities [10] and are characterized by phase and group velocities.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Lamb Wave Anti-Symmetric Mode Phase Velocity in Various Dispersion Ranges Using Only Two Signals

Draudvilienė

Raišutis

2023

Symmetry

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The application of non-stationary Lamb wave signals is a promising tool in various industrial applications where information about changes inside a structure is required. Phase velocity is one of the Lamb wave parameters that can be used for inhomogeneities detection. The possibility of reconstructing the segment of the phase velocity in a strong dispersion range using only two signals is proposed. The theoretical study is performed using signals of the A0 mode propagating in an aluminium plate at a frequency of 150 kHz, 300 kHz, 500 kHz and 900 kHz. The experiment was carried out at a value of 300 kHz. The studies conducted indicated that the maximum distance between two signals, at which the time-of-flight can be measured between the same phase points, is the main parameter for the two signals technique application. Theoretical and experimental studies were performed, and the mean relative error was calculated by comparing the obtained results with those calculated via the SAFE method. In the theoretical study, the mean relative error of 0.33% was obtained at 150 kHz, 0.22% at 300 kHz, 0.23% at 500 kHz and 0.11% at 900 kHz. The calculated mean relative errors δcph=0.91% and δcph=1.36% were obtained at different distances in the experimental study. The results obtained show that the estimation of the phase velocity in dispersion ranges using only two received signals was a useful tool that saved time and effort.

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Guided ultrasonic waves propagation imaging: a review

Cited by 22 publications

References 388 publications

Damage Monitoring of Steel Bars Based on Torsional Guided Waves

Damage Monitoring of Steel Bars Based on Torsional Guided Waves

Water ingress detection in an aluminum honeycomb sandwich structure using laser ultrasonics based on mode conversion behaviors

Estimation of Lamb Wave Anti-Symmetric Mode Phase Velocity in Various Dispersion Ranges Using Only Two Signals

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