Guided ultrasonic wave tomography of a pipe bend exposed to environmental conditions: A long-term monitoring experiment

Simonetti, F.; Alqaradawi, Mohammed

doi:10.1016/j.ndteint.2019.04.010

Cited by 27 publications

(16 citation statements)

References 16 publications

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“…In order to locate the damage with accuracy, the superimposition of all the perceptual paths corresponding by the maps of probability distribution is served to obtain the damage probability distribution of any point (x, y) in the regions of detection with N perceptual path [25]:…”

Section: Principle Of Lamb Wave Tomographymentioning

confidence: 99%

Damage Localization of Composites Based on Difference Signal and Lamb Wave Tomography

Jiang

Liang

et al. 2020

Materials

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In order to deal with the problem of composite damage location, an imaging technique based on differential signal and Lamb wave tomography was proposed. Firstly, the feasibility of the technique put forward was verified by simulation. In this process, the composite model was regularly set down by the circular sensor array, with each sensor acting as an actuator in sequence to generate Lamb waves. Apart from that, other sensors were used to collect response signals. With regard to the damage factor, it was mainly determined by the difference between the damage signal and the non-damage signal. The probabilistic imaging algorithm was employed to carry out damage location imaging. Then, experiments were carried out so as to study the selected composite plate. Finally, the tentative outcomes have illustrated that the maximum error of damage imaging position was 7.07 mm. The relative error was 1.6%. In addition, the method has the characteristics of simple calculation and high imaging efficiency. Therefore, it has large technical potential and wide applications in the damage location and damage recognition for composite material.

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Section: Principle Of Lamb Wave Tomographymentioning

confidence: 99%

Damage Localization of Composites Based on Difference Signal and Lamb Wave Tomography

Jiang

Liang

et al. 2020

Materials

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“…In this paper, the specimen is much thicker than the ones used in other Lamb wave inspection [6,7,8,9,10,11,12,13,14,15,16,17,19,20,21]. It means that the Lamb wave with dominant longitudinal displacement, where displacement or power flux is concentrated on the outside surface, can be the sustainable mode for energy loss and attenuation.…”

Section: Theoretical Fundamentalsmentioning

confidence: 99%

“…The work to date has been primarily performed using contact transducers [10,11,12,13], air-coupled transducers [14,15], and laser ultrasound [16,17]. Significant literature has been published on Lamb wave pipe inspection applications [18,19,20]. Especially, for the elbow-shape region in a pipe, including bended case, the defects are dramatically inspected on the pipe considering environmental condition [19].…”

Section: Introductionmentioning

confidence: 99%

“…Significant literature has been published on Lamb wave pipe inspection applications [18,19,20]. Especially, for the elbow-shape region in a pipe, including bended case, the defects are dramatically inspected on the pipe considering environmental condition [19]. Earlier research showed that qualitative defect imaging with ghost imaging was able to describe the accurate size of the failure.…”

Section: Introductionmentioning

confidence: 99%

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An Investigation on a Quantitative Tomographic SHM Technique for a Containment Liner Plate in a Nuclear Power Plant with Guided Wave Mode Selection

Lee

Cho

2019

Sensors

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The containment liner plate (CLP) in a nuclear power plant is the most critical part of the structure of a power plant, as it prevents the radioactive contamination of the surrounding area. This paper presents feasibility of structural health monitoring (SHM) and an elastic wave tomography method based on ultrasonic guided waves (GW), for evaluating the integrity of CLP. It aims to check the integrity for a dynamic response to a damaged isotropic structure. The proposed SHM technique relies on sensors and, therefore, it can be placed on the structure permanently and can monitor either passively or actively. For applying this method, a suitable guided wave mode tuning is required to verify wave propagation. A finite element analysis (FEA) is performed to figure out the suitable GW mode for a CLP by considering geometric and material condition. Furthermore, elastic wave tomography technique is modified to evaluate the CLP condition and its visualization. A modified reconstruction algorithm for the probabilistic inspection of damage tomography algorithm is used to quantify corrosion defects in the CLP. The location and shape of the wall-thinning defects are successfully obtained by using elastic GW based SHM. Making full use of verified GW mode to Omni-directional transducer, it can be expected to improve utilization of the SHM based evaluation technique for CLP.

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“…As the propagation characteristics of the guided waves in curved pipes are different from those in straight pipes [1] , the propagation of guided waves in elbow-containing piping systems is more complicated than straight pipes. There exist phenomena such as transmission rate decline [2] , mode conversion [3][4][5] , elbow reflection [6] , etc. at the elbow, which cause difficulties in defects detection in elbow-containing piping systems.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic guided wave detection of U-shaped pipeline

Zhu¹,

Kong²,

Zhang³

et al. 2020

MATEC Web Conf.

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The guided waves in the elbow was analyzed using semianalytical finite element method, which was used to calculate the dispersion curves, along with the vibration deformation and energy flow density distribution of the elbow cross-section. The L(0,1) mode guided wave was used to detect different defects in the U-shaped pipeline in experiment. The average experimental velocity of L(0,1) mode in U-shaped pipeline was between the theoretical velocities of the straight pipe and the elbow, due to the different velocities in the two parts. The detection sensitivity difference of L(0,1) mode guided wave to defects in intrados and extrados of the elbow was analyzed, the experimental result showed that the reflected signal amplitude of defect in extrados was significantly larger than the defect in intrados, which was consistent with the energy flow density distribution in elbow cross-section.

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Guided ultrasonic wave tomography of a pipe bend exposed to environmental conditions: A long-term monitoring experiment

Cited by 27 publications

References 16 publications

Damage Localization of Composites Based on Difference Signal and Lamb Wave Tomography

Damage Localization of Composites Based on Difference Signal and Lamb Wave Tomography

An Investigation on a Quantitative Tomographic SHM Technique for a Containment Liner Plate in a Nuclear Power Plant with Guided Wave Mode Selection

Ultrasonic guided wave detection of U-shaped pipeline

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