Transient Electromagnetic-thermal Nondestructive Testing: Pulsed Eddy Current And Transient Eddy…

Paperback | June 1, 2017

byYunze He, Bin Gao, Ali Sophian

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There are two typical transient EM NDT methods, pulsed eddy current PEC and transient eddy current thermography TECT which are introduced and researched in this book. This book covers the three key areas of theories, methods, and applications: Theory: 1 Multi-physics field including eddy current, heat conduction, and Infrared radiation are studied for defect evaluation; 2 Lateral heat conduction is analysed to detect parallel cracks; 3 Longitudinal heat conduction is analysed to detect depth defect, which is beyond skin depth; Methods: 1 Time domain, frequency domain, and logarithm domain are analysed; 2 A-scan , B-scan, and C-scan are introduced and compared; 3 Defect identification, classification, quantification are analysed; 4 Advanced algorithm, principal components analysis PCA , independent components analysis ICA and support vector machine SVM are used; 5 Image reconstruction is proposed to improve the detectability. Applications: 1 A lot of experimental studies on multi-layer aluminium structures, honeycomb structure, CFRP in aerospace field, steel and coating in marine field, rail in transportation field are provided; 2 A variety of real damages are evaluated, such as corrosion and blister in steel, stress in aluminium, impact and delamination in CFRP laminates, RCF cracks in rail. Different from steady NDT testing, transient EM NDT testing is special. Two kinds of transient NDT testing are introduced from theory, methodology to applications Theoretically, multi-physics field including eddy current, heat conduction, Infrared radiation are studied for defect evaluation; lateral heat conduction is used to detect parallel cracks; longitudinal heat conduction is used to detect depth defect, which is beyond skin depth Methodologically, a lot of methods are analysed. Time domain frequency domain, and logarithm domain are analysed; A-scan , B-scan, and C-scan are introduced and compared; advanced algorithm principal components analysis PCA , independent components analysis ICA and support vector machine SVM are used; Image reconstruction is used to improve the detectability In view of application, macro damage and micro properties variations including conductivity, permeability, and lift-off are evaluated; Experimental studies for real damages including corrosion and blister in steel, stress in aluminium, impact and delamination in CFRP laminates, RCF cracks are abundant

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There are two typical transient EM NDT methods, pulsed eddy current PEC and transient eddy current thermography TECT which are introduced and researched in this book. This book covers the three key areas of theories, methods, and applications: Theory: 1 Multi-physics field including eddy current, heat conduction, and Infrared radiation...

Dr. He is a lecturer in National University of Defense Technology (NUDT), China. He is also IEEE member and ASNT member. He has published more than 30 papers on peer-reviewed journals and conferences, in which 8 papers have arrived into global 10% and 1 paper has been awarded as highly cited paper in Essential Science Indicators (ESI)....
Format:PaperbackDimensions:370 pages, 8.75 × 6.35 × 0.68 inPublished:June 1, 2017Publisher:Butterworth (trade)Language:English

The following ISBNs are associated with this title:

ISBN - 10:0128127872

ISBN - 13:9780128127872

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Table of Contents

1. Nondestructive Testing and Transient Electromagnetic-Thermal NDT

Part I: Pulsed Eddy Current 2. Magnetic Sensor Based Pulsed Eddy Current for Defect Detection and Characterization 3. Hall Based PEC Features for Material Properties Evaluation and Defect Detection 4. Coil-Based Rectangular PEC Sensor for Defect Classification

Part II: Transient Eddy Current Thermography 5. Active Thermography and Eddy Current Excited Thermography 6. Heat Conduction Based Eddy Current Pulsed Thermography (ECPT) for Defect Evaluation 7. Eddy Current Step or Time-resolved Thermography (ECST) 8. Eddy Current Pulsed Phase Thermography (ECPPT) for Metal Materials Evaluation 9. Volume or Inside Heating Eddy Current Thermography 10. Volume Heating ECT and Phase Analysis for CFRP Evaluation 11. Pulsed Inductive Thermal Wave Radar (PITWR) 12. Through Coating Imaging of Early Marine Corrosion Using ECPPT

Part III: Physical-Mathematical Model Based ECPT for Defect Evaluation 13. Separations of ECPT Transient Electromagnetic Thermal Fields 14. Unsupervised Sparse Pattern Diagnostic of Defects with ECPT 15. Multi-dimensional Tensor-based ECPT for Wind Turbine Gear Inspection 16. Physics-based Modeling and Pattern Mining of ECPT