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A hybrid spiral-bobbin eddy current testing probe for detection of crack of arbitrary orientation in steam generator tubes SCIE
期刊论文 | 2021 | NONDESTRUCTIVE TESTING AND EVALUATION
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Abstract :

This paper presents a new hybrid spiral-bobbin probe (S-bobbin probe) of transmitting-receiving (TR) mode for efficient eddy current testing (ECT) of steam generator tubes in nuclear power plants. The new probe of novel configuration can solve the major drawback of the conventional bobbin type ECT probe, i.e., insensitive to circumferential cracks. The excitation coil of the new probe consists of 2 coil segments of spiral geometry and 2 coil segments of half circle geometry which are sequentially connected to form a full coil loop. To acquire defect signal of low lift-off noise, the TR probe mode is adopted and the shape of the pick-up coil is selected the same as that of the excitation coil. As the S-bobbin probe can induce eddy currents in two different directions, it can detect cracks in SG tubes of arbitrary orientations. In order to demonstrate the validity and efficiency of the new S-bobbin probe, simulations and experiments were carried out with a prototype S-bobbin probe and tube specimens with circumferential or axial artificial cracks. The simulation and experimental results agree well, and both of them reveal that a crack in any direction can be properly detected and evaluated by using the new probe.

Keyword :

crack of arbitrary orientation Eddy current testing spiral-bobbin probe steam generator tubes new probe configuration

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GB/T 7714 Zhao, Yingsong , Wang, Meng , Han, Jie et al. A hybrid spiral-bobbin eddy current testing probe for detection of crack of arbitrary orientation in steam generator tubes [J]. | NONDESTRUCTIVE TESTING AND EVALUATION , 2021 .
MLA Zhao, Yingsong et al. "A hybrid spiral-bobbin eddy current testing probe for detection of crack of arbitrary orientation in steam generator tubes" . | NONDESTRUCTIVE TESTING AND EVALUATION (2021) .
APA Zhao, Yingsong , Wang, Meng , Han, Jie , Deng, Jie , Zhu, Yulong , Cai, Wenlu et al. A hybrid spiral-bobbin eddy current testing probe for detection of crack of arbitrary orientation in steam generator tubes . | NONDESTRUCTIVE TESTING AND EVALUATION , 2021 .
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A Reconstruction Scheme Using an Average Conductivity Element for Pitting Corrosion Defects in Steam Generator Tubes From Eddy Current Testing Signals EI SCIE
期刊论文 | 2021 , 57 (10) | IEEE TRANSACTIONS ON MAGNETICS
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Abstract :

Pitting corrosion is a typical defect in steam generator tubes of nuclear power plants (NPPs) which may cause leak of coolant water in the first circulation loop of an NPP. Different from a crack, the pitting defect has small hole-like geometrical feature, which makes the conventional inversion scheme for crack profile reconstruction using eddy current testing (ECT) signals unsuitable. In this article, a numerical scheme to reconstruct the pitting corrosion defect from ECT signals is proposed and validated, including a new efficient ECT signal forward solver and an iterative inversion algorithm. For efficient calculation of the ECT signals due to a pitting hole, defect model based on a finite element of average conductivity is proposed. The model is validated by comparing its results with those of the conventional finite element method and boundary element method (FEM-BEM) hybrid code of A-phi formulation using a detailed mesh for a flat-bottom hole. To reconstruct the defect profile such as the depth and diameter, the particle swarm optimization algorithm was adopted to solve the inversion problem iteratively. Finally, ECT experiments were conducted for test piece tubes with artificial pitting defects of different sizes and the defect profile parameters were reconstructed from the measured ECT signals with the proposed numerical schemes. Both the depths and the diameters of the artificial pitting defects, i.e., flat-bottom holes, were properly reconstructed referring to the true defect sizes.

Keyword :

inverse analysis particle swarm optimization (PSO) method Average conductivity element pitting corrosion defect

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GB/T 7714 Zhao, Yingsong , Wang, Li , Qi, Pan et al. A Reconstruction Scheme Using an Average Conductivity Element for Pitting Corrosion Defects in Steam Generator Tubes From Eddy Current Testing Signals [J]. | IEEE TRANSACTIONS ON MAGNETICS , 2021 , 57 (10) .
MLA Zhao, Yingsong et al. "A Reconstruction Scheme Using an Average Conductivity Element for Pitting Corrosion Defects in Steam Generator Tubes From Eddy Current Testing Signals" . | IEEE TRANSACTIONS ON MAGNETICS 57 . 10 (2021) .
APA Zhao, Yingsong , Wang, Li , Qi, Pan , Zhu, Yulong , Han, Jie , Guo, Wei et al. A Reconstruction Scheme Using an Average Conductivity Element for Pitting Corrosion Defects in Steam Generator Tubes From Eddy Current Testing Signals . | IEEE TRANSACTIONS ON MAGNETICS , 2021 , 57 (10) .
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A numerical simulation method of nonlinear magnetic flux leakage testing signals for nondestructive evaluation of plastic deformation in a ferromagnetic material EI SCIE
期刊论文 | 2021 , 155 | MECHANICAL SYSTEMS AND SIGNAL PROCESSING
WoS CC Cited Count: 1
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Abstract :

Nonlinear Magnetic Flux Leakage Testing (MFLT) method is a relative new non-destructive testing (NDT) technique for inspection defect or micro damage in structure of ferromagnetic material by measuring the leakage magnetic field during an alternative magnetization process. To enhance the nonlinear MFLT technique, a numerical tool for simulating the inspection signal is very important in views to clarify the detection mechanism and to improve the detection efficiency. However, most of the simulation methods on magnetic NDT problems solve problem without considering the hysteresis effects of ferromagnetic materials and is difficult to deal with the influence of mechanical damage. In this paper, a numerical scheme is proposed at first to simulate the nonlinear MFLT signals considering the nonlinearity and hysteresis characteristics of ferromagnetic materials based on the equivalent magnetic polarization approach and FEM-BEM hybrid method. The validities of the proposed method and the corresponding numerical code are proved by comparing the simulation results of a typical nonlinear MFLT problem with the experimental measured signals. Secondly, in order to cope with the influence of plastic deformation in material on the nonlinear MFLT signals, a magneto-mechanical coupling constitutive relation is proposed and applied to the developed numerical simulation code. Finally, the nonlinear MFLT signals of specimen with different plastic deformation are simulated with the developed numerical code and the influence mechanism of plastic deformation on nonlinear MFLT signals is discussed based on the numerical results. The results reveal that the distortion of nonlinear MFLT signals mainly due to the magnetic remanence coefficient of material which can be significantly influenced by micro damage such as the plastic deformation. (c) 2021 Elsevier Ltd. All rights reserved.

Keyword :

Plastic deformation Modified Jiles-Atherton model Numerical simulation method FEM-BEM hybrid method NDE Nonlinear magnetic flux leakage

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GB/T 7714 He, Manru , Shi, Pengpeng , Xie, Shejuan et al. A numerical simulation method of nonlinear magnetic flux leakage testing signals for nondestructive evaluation of plastic deformation in a ferromagnetic material [J]. | MECHANICAL SYSTEMS AND SIGNAL PROCESSING , 2021 , 155 .
MLA He, Manru et al. "A numerical simulation method of nonlinear magnetic flux leakage testing signals for nondestructive evaluation of plastic deformation in a ferromagnetic material" . | MECHANICAL SYSTEMS AND SIGNAL PROCESSING 155 (2021) .
APA He, Manru , Shi, Pengpeng , Xie, Shejuan , Chen, Zhenmao , Uchimoto, Tetsuya , Takagi, Toshiyuki . A numerical simulation method of nonlinear magnetic flux leakage testing signals for nondestructive evaluation of plastic deformation in a ferromagnetic material . | MECHANICAL SYSTEMS AND SIGNAL PROCESSING , 2021 , 155 .
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A novel circumferential eccentric eddy current probe and its application for defect detection of small-diameter tubes EI SCIE
期刊论文 | 2021 , 331 | SENSORS AND ACTUATORS A-PHYSICAL
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Abstract :

When it comes to the detection of defects in small-diameter tube, eddy current testing (ECT) using Bobbin probe is the traditional method. Although this way is quite efficient, it is not available to obtain the circumferential information of the defect due to its inherent disadvantage. In this study, a novel probe has been proposed which can obtain both axial and circumferential information of defects, still with high efficiency. During testing, the probe carries out axial scan for defect searching in axial direction, and when defect is discovered, the circumferential eccentric rotating scan module will be executed. Thus, this novel probe can achieve multiple defect information with high efficiency. The specific research contents are as follows. Firstly, the eccentric and rotatable EC probe is designed suitably for small-diameter tubes, with the simulation model built up for signal analysis. Then, the feasibility of this novel probe is verified by integrating the obtained simulation data, showing the advantages of the developed probe for obtaining both axial and circumferential multiple information of defects in small-diameter tube. Finally, the novel probe is fabricated, and the testing system is established. The corresponding experiments are conducted, certifying the superiority and efficiency of the new type of probe further. (c) 2021 Elsevier B.V. All rights reserved.

Keyword :

Multiple defect information Eddy current testing Circumferential eccentric probe Small-diameter tube

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GB/T 7714 Yang, Qingning , Xie, Shejuan , He, Kun et al. A novel circumferential eccentric eddy current probe and its application for defect detection of small-diameter tubes [J]. | SENSORS AND ACTUATORS A-PHYSICAL , 2021 , 331 .
MLA Yang, Qingning et al. "A novel circumferential eccentric eddy current probe and its application for defect detection of small-diameter tubes" . | SENSORS AND ACTUATORS A-PHYSICAL 331 (2021) .
APA Yang, Qingning , Xie, Shejuan , He, Kun , Chen, Yue-E , Chen, Zhenmao , Uchimoto, Tetsuya et al. A novel circumferential eccentric eddy current probe and its application for defect detection of small-diameter tubes . | SENSORS AND ACTUATORS A-PHYSICAL , 2021 , 331 .
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航空金属套管结构脉冲远场涡流检测机制及探头优化
期刊论文 | 2021 , 22 (1) , 16-21 | 空军工程大学学报(自然科学版)
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Abstract :

航空金属套管结构凭借其套管管材可选择性组合的特点,有力提升了航空管道服役过程中的结构安全性与稳定性,因此广泛应用于航空、航天等领域的重要装备中.为进一步保障航空金属套管结构的服役安全,需采用有效的无损定量检测方法定期对其进行检测和损伤评估.围绕不锈钢-碳钢双层航空金属套管的无损定量检测,着力探究脉冲远场涡流检测机制及检测探头优化.通过快速有限元仿真研究,明晰磁场及坡印廷矢量在套管内外空气域中的分布规律、远场区识别手段等,并基于此,深入探索电磁屏蔽结构及其在检测探头优化中的有效性.结合仿真研究,对航空金属套管腐蚀减薄缺陷检测进行了实验探究,通过实验进一步验证所提航空金属套管结构脉冲远场涡流检测的远场区识别方法以及基于电磁屏蔽的探头优化成效.

Keyword :

航空金属套管 探头优化 坡印廷矢量 电磁屏蔽 脉冲远场涡流

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GB/T 7714 张超 , 李勇 , 刘正帅 et al. 航空金属套管结构脉冲远场涡流检测机制及探头优化 [J]. | 空军工程大学学报(自然科学版) , 2021 , 22 (1) : 16-21 .
MLA 张超 et al. "航空金属套管结构脉冲远场涡流检测机制及探头优化" . | 空军工程大学学报(自然科学版) 22 . 1 (2021) : 16-21 .
APA 张超 , 李勇 , 刘正帅 , 闫贝 , 任淑廷 , 陈振茂 . 航空金属套管结构脉冲远场涡流检测机制及探头优化 . | 空军工程大学学报(自然科学版) , 2021 , 22 (1) , 16-21 .
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Joint effect of residual stress and plastic deformation on pulsed eddy current response signals in 304 austenitic stainless steel SCIE
期刊论文 | 2020 , 63 (1) , 19-30 | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS
WoS CC Cited Count: 3
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Abstract :

As one typical material of nuclear power plant structure, austenitic stainless steel (SS) is often accompanied by residual stress and plastic deformation during their manufacture and application, which may affect the structure service safety. In this paper, the effects of the composite state of residual stress and plastic deformation on the pulsed eddy current testing (PECT) signals of SS are studied theoretically and experimentally. By considering the electromagnetic properties in the composite state, the PECT theory is established for the 304 SS in the composite state. The numerical simulation is completed using the reduced vector potential method and the verification experiment is also carried out. The comparison between simulation and experimental results shows that the peak value of the PECT signal increases with the increase of plastic deformation or residual stress. This means that if the residual stress is not considered in the composite state, the effectiveness of the PECT method for evaluating plastic deformation may be seriously affected.

Keyword :

composite state residual stress plastic deformation pulsed eddy current testing 304 austenitic stainless steel

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GB/T 7714 Bai, Peigen , Shi, Pengpeng , Zhao, Yingsong et al. Joint effect of residual stress and plastic deformation on pulsed eddy current response signals in 304 austenitic stainless steel [J]. | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS , 2020 , 63 (1) : 19-30 .
MLA Bai, Peigen et al. "Joint effect of residual stress and plastic deformation on pulsed eddy current response signals in 304 austenitic stainless steel" . | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS 63 . 1 (2020) : 19-30 .
APA Bai, Peigen , Shi, Pengpeng , Zhao, Yingsong , Chen, Hong-En , Xie, Shejuan , Chen, Zhenmao . Joint effect of residual stress and plastic deformation on pulsed eddy current response signals in 304 austenitic stainless steel . | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS , 2020 , 63 (1) , 19-30 .
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Influence of electric charge on numerical simulation of eddy current testing signals due to a conductive crack when using multi-media element EI SCIE Scopus
期刊论文 | 2020 , 10 (3) | AIP ADVANCES | IF: 1.548
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Abstract :

The multi-media finite element (MME) treating the discontinuity of the conductivity within the element was proposed by authors for fast simulation of the eddy current testing (ECT) signals of a conductive crack such as a stress corrosion crack. However, in the cases when eddy current consists of a large component perpendicular to the crack surface, the simulation accuracy is sometimes not very good because of the appearance of electric charge on the crack surface. In this paper, the influences of the surface electric charge on the implementation of the numerical method and on the simulation of the ECT signals were analyzed theoretically. A series of numerical analyses were designed to investigate the scope of feasibility of the MME. The simulation accuracy of the MME for different probe orientations and crack shapes was discussed based on the analysis of the distribution of the surface charge.

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GB/T 7714 Li, Xudong , Jomdecha, Cherdpong , Chen, Zhenmao . Influence of electric charge on numerical simulation of eddy current testing signals due to a conductive crack when using multi-media element [J]. | AIP ADVANCES , 2020 , 10 (3) .
MLA Li, Xudong et al. "Influence of electric charge on numerical simulation of eddy current testing signals due to a conductive crack when using multi-media element" . | AIP ADVANCES 10 . 3 (2020) .
APA Li, Xudong , Jomdecha, Cherdpong , Chen, Zhenmao . Influence of electric charge on numerical simulation of eddy current testing signals due to a conductive crack when using multi-media element . | AIP ADVANCES , 2020 , 10 (3) .
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Reconstruction of cracks in a carbon fiber-reinforced polymer laminate plate from signals of eddy current testing EI SCIE Scopus
期刊论文 | 2020 , 54 (24) , 3527-3536 | JOURNAL OF COMPOSITE MATERIALS | IF: 2.591
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This article aims to study the quantitative eddy current testing of structures of carbon fiber reinforced polymer (CFRP) material; numerical schemes for forward and inverse analysis of eddy current testing signals are proposed and validated for eddy current testing of the CFRP material. At first, an efficient forward solver based on the database approach is updated to treat anisotropic eddy current problem for efficient simulation of the eddy current testing signals due to crack in CFRP material, and an inversion scheme based on the conjugate gradient method is developed using the updated fast forward solver for sizing defect in a CFRP plate. Second, a hybrid inverse analysis scheme is proposed and implemented to improve the sizing accuracy of crack in a CFRP plate using eddy current testing signals of high frequency. Third, eddy current testing signals due to artificial cracks in a CFRP plate are measured and adopted to reconstruct the profile of the cracks. A good agreement between the true and the reconstructed defect sizes demonstrated the validity of both the fast forward solver and the new inversion scheme for sizing defects in the CFRP plate from eddy current testing signals.

Keyword :

high frequency eddy current testing CFRP efficient forward solver hybrid inverse analysis

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GB/T 7714 Du, Yali , Li, Xudong , Xie, Shejuan et al. Reconstruction of cracks in a carbon fiber-reinforced polymer laminate plate from signals of eddy current testing [J]. | JOURNAL OF COMPOSITE MATERIALS , 2020 , 54 (24) : 3527-3536 .
MLA Du, Yali et al. "Reconstruction of cracks in a carbon fiber-reinforced polymer laminate plate from signals of eddy current testing" . | JOURNAL OF COMPOSITE MATERIALS 54 . 24 (2020) : 3527-3536 .
APA Du, Yali , Li, Xudong , Xie, Shejuan , Yang, Shiyou , Chen, Zhenmao . Reconstruction of cracks in a carbon fiber-reinforced polymer laminate plate from signals of eddy current testing . | JOURNAL OF COMPOSITE MATERIALS , 2020 , 54 (24) , 3527-3536 .
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A study on influence of strong magnetic field on fracture of interface crack considering magneto-elastic coupling effects EI SCIE CPCI-S Scopus
期刊论文 | 2020 , 64 (1-4) , 581-588 | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS | IF: 0.706
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Abstract :

The influence of strong magnetic field on stress intensity factor of an interface crack is studied in this paper. The nonlinear piezomagnetic property and magnetostriction effect have been taken into consideration in the theoretical analyses. This multi-field coupled problem is solved through a sequential coupling approach. The perturbed magnetization caused by the deformation around the crack is solved under magnetic boundary conditions. After modified by the perturbed magnetization, the initial loads are updated with magnetic forces for iterative calculation. With this strategy, the distributions of the stress and displacement at the crack region approach to the real solution gradually. Numerical results show that the influence of the external magnetic field on fracture behaviors is not ignorable. For structures with interface crack serving in a strong magnetic field, e.g., the multi-layer welded structures in the Tokamak device, the magneto-elastic coupling effects have to be considered to deal with its fracture problem.

Keyword :

magnetostriction effect interface crack Magnetoelastic stress intensity factor

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GB/T 7714 Xie, Zheng , Zhao, Yinsong , Li, Qun et al. A study on influence of strong magnetic field on fracture of interface crack considering magneto-elastic coupling effects [J]. | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS , 2020 , 64 (1-4) : 581-588 .
MLA Xie, Zheng et al. "A study on influence of strong magnetic field on fracture of interface crack considering magneto-elastic coupling effects" . | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS 64 . 1-4 (2020) : 581-588 .
APA Xie, Zheng , Zhao, Yinsong , Li, Qun , Chen, Zhenmao , Uchimoto, Tetsuya , Takagi, Toshiyuki . A study on influence of strong magnetic field on fracture of interface crack considering magneto-elastic coupling effects . | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS , 2020 , 64 (1-4) , 581-588 .
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Laser array spots thermography for detection of cracks in curved structures EI SCIE CPCI-S Scopus
期刊论文 | 2020 , 64 (1-4) , 385-391 | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS | IF: 0.706
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Abstract :

The laser array spot thermography (LAST) is a fully non-contact and non-destructive method for the inspection of surface cracks with high efficiency. In this study, the detection capability of this method for the inspection of surface cracks in structures with curved surfaces is experimentally studied. The influence of the inspection angle on the crack imaging results is also investigated. The experiment results show that cracks in surface of the pipes with different dimeters can be detected and imaged by LAST.

Keyword :

curved structures inspection angle surface crack Laser array spot thermography

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GB/T 7714 Qiu, Jinxing , Pei, Cuixiang , Yang, Yang et al. Laser array spots thermography for detection of cracks in curved structures [J]. | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS , 2020 , 64 (1-4) : 385-391 .
MLA Qiu, Jinxing et al. "Laser array spots thermography for detection of cracks in curved structures" . | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS 64 . 1-4 (2020) : 385-391 .
APA Qiu, Jinxing , Pei, Cuixiang , Yang, Yang , Liu, Haochen , Chen, Zhenmao . Laser array spots thermography for detection of cracks in curved structures . | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS , 2020 , 64 (1-4) , 385-391 .
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