Pipeline corrosion assessment using piezo-sensors in reusable non-bonded configuration

Raju, J.; Bhalla, Suresh; Talakokula, Visalakshi

doi:10.1016/j.ndteint.2020.102220

Cited by 24 publications

(7 citation statements)

References 25 publications

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“…Under the same pressure load, p = 15.6534 MPa is taken as the first example and p = 13.2534 MPa is taken as the second example. The von Mises stress distribution field is shown in Figures 20 and 21 In Tables 9 and 10, for the first example with l o = l o = 2 mm, s = 2 mm, and l i = l i = 6 mm, under the same pressure load p = 15.6534 MPa, the interference scale factors including γ 1 Mises , γ 2 Mises , and γ 3 Mises are compared. Owing to the interference of the 6 mm crack on the 2 mm crack, γ 1 Mises =1.3897, i.e., the von Mises stress peak value at crack tip T 1 for the double-crack case (2 mm and 6 mm, respectively) is 1.3897 times as large as the peak value at the crack tip T 1 when only the single 2 mm crack exists.…”

Section: Effect Of Crack Size On Crack Interferencementioning

confidence: 99%

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Modeling the Crack Interference in X80 Oil and Gas Pipeline Weld

et al. 2023

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Based on the numerical simulation method of the virtual crack closure technique (VCCT), an interference model was established to investigate the physical problem of two interacting cracks of different sizes in the welding zone of oil and gas pipelines. The obtained results of the current interference problem were compared with those of single crack case. Various crack configurations, such as different crack spacing and different crack sizes, were analyzed. The characteristic quantity fluid pressure load P during the crack propagation process, the peak value of the von Mises stress distribution field of the crack growth path, as well as the difference ∆Bx between the peak value of the magnetic induction intensity component at the crack and the value of the magnetic induction intensity component at its symmetrical position were calculated. The crack interaction scale factors, including γP, γMises, and γΔBx, were compared and analyzed. The numerical modeling results show that when the unequal-length double cracks interfere with each other, the cracks are more likely to propagate toward each other. The tendency of the double-cracks to propagate toward each other gradually weakens as the distance between the crack tips increases and is finally the same as that of single-crack cases. It was also found that the effect of large-sized cracks on small-sized cracks is greater than that of small-sized ones on large-sized ones. The numerical modeling results could be applied for the prediction and analysis of multicrack damage in oil and gas pipeline welds.

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Section: Effect Of Crack Size On Crack Interferencementioning

confidence: 99%

“…The fractures of storage tank steel and pipeline steel are generally ductile fractures. Once ductile fractures occur, the cracks will gradually propagate and are difficult to stop until the above-mentioned catastrophic accidents are caused [1][2][3][4][5][6]. Cracks in actual pipelines mostly exist in the form of crack groups.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Crack Interference in X80 Oil and Gas Pipeline Weld

et al. 2023

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“…This research underscores the challenges posed by the complex rebar surface and assesses the effectiveness of proposed configurations. Raju et al 21 present non-bonded piezo configurations to monitor corrosion-induced damage in pipeline structures. This study shows a potential replacement for typical bonded piezo sensors for corrosion detection and assessment in pipeline However, the repeatability of the impedance signatures is a critical factor that affects the reliability of the monitoring systems.…”

Section: Introductionmentioning

confidence: 99%

A proof of concept study on reliability assessment of different metal foil length based piezoelectric sensor for electromechanical impedance techniques

Parida,

Moharana,

Vicente

et al. 2024

Sci Rep

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Lead zirconate titanate (PZT) patches gained popularity in structural health monitoring (SHM) for its sensing and cost effective. However, a robust installation of PZT patches is challenging due to the often-complex geometry and non-accessibility of structural parts. For tubular structures, the curved surface can compromise the perfect bonding of PZT patches. To alleviate the above-mentioned challenges, the non-bonded and reusable configuration of sensor received considerable interest in the field of SHM. However, ensuring the repeatability and reproducibility of Electro-Mechanical Impedance (EMI) measurements is crucial to establish the reliability of these techniques. This work investigated the repeatability and reproducibility measures for one of non-bonded configuration of PZT patch i.e., Metal Foil Based Piezo Sensor (MFBPS). In addition, the concept, application, and suitability of MFBPS for impedance-based monitoring technique of Civil infrastructure are critically discussed. This study evaluates the effect of length of MFBPS on piezo coupled admittance signature. Also, this study evaluates repeatability and reproducibility of EMI measurements via statistical tools such as ANOVA and Gage R&R analysis. The statistical index CCDM was used to quantify the deviations of impedance signals. The overall result shows that the repeatability of the EMI measurements improves with a metal foil length of 500 mm. Overall, this investigation offers a useful point of reference for professionals and scholars to ensure the reliability of MFBPS for EMI techniques, a variant of piezoelectric sensor for SHM applications.

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“…In these years, the EMA technique concerning the use of epoxy-bonded PZTs has been effectively extended for metallic, composite, and concrete SDD applications. [5][6][7][8][9][10] However, the accuracy of SDD highly depends on the ability of the adhesive layer to transfer the stress and strain through shear lag mechanism; meanwhile, any defects in the adhesive layer inevitably alter the coupled EMA signatures. Bonding defects, such as incomplete solidification or softening, are easily induced by environmental impact or improper operation in long-range monitoring practice.…”

Section: Introductionmentioning

confidence: 99%

Adhesive curing effect of bonded piezoelectric transducer on electromechanical impedance-based concrete structural damage detection

Zhu

2022

Structural Health Monitoring

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Complete understanding of the adhesive curing effect of a bonded piezoelectric lead zirconate titanate (PZT) sensor on the electromechanical admittance (EMA, inverse of impedance) facilitates the accurate diagnosis of structural damages when employing the impedance technique for structural health monitoring. This article analytically and experimentally investigated the curing effect of adhesive layer on the EMA-based concrete structural damage detection. Curing effect was theoretically incorporated into shearing mechanism of adhesive layer to formulate a new one-dimensional PZT-structural impedance model. Analytical analysis of the curing effect on the EMA signature as well as the EMA-based damage diagnosis was calculably interpreted through the model. Proof-of-concept experiment was performed on testing a four-point bending reinforced concrete (RC) beam bonded with multiple PZT patches under adhesive curing. Experimental results demonstrated that singular shift in the EMA spectra under adhesive curing could be turned into three typical shifts when structural damage occurred, which cogently validated the analytical results. Quantifiable signal index further provided useful information for the identification of crack occurrence, progression, and reinforcement yielding of the RC beam. Results of this study potentially promoted the real-life engineering applications of impedance technique inclusive of deficient adhesive condition.

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Pipeline corrosion assessment using piezo-sensors in reusable non-bonded configuration

Cited by 24 publications

References 25 publications

Modeling the Crack Interference in X80 Oil and Gas Pipeline Weld

Modeling the Crack Interference in X80 Oil and Gas Pipeline Weld

A proof of concept study on reliability assessment of different metal foil length based piezoelectric sensor for electromechanical impedance techniques

Adhesive curing effect of bonded piezoelectric transducer on electromechanical impedance-based concrete structural damage detection

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