Numerical Simulation of Defect Inspection Using Electromagnetically Stimulated Thermography

The feasibility of electromagnetically stimulated thermography non-destructive testing （NDT） for the detection of defects in metallic conductive materials has been carried out by finite element analysis. Aluminum plates with defects of different diameters, depths, locations, shapes and orientation w...

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Published inShanghai jiao tong da xue xue bao Vol. 16; no. 3; pp. 262 - 265
Main Author 刘国飞 李国华
Format Journal Article
LanguageEnglish
Published Heidelberg Shanghai Jiaotong University Press 01.06.2011
Subjects
Aluminum
Architecture
Computer programs
Computer Science
Computer simulation
Defects
Electrical Engineering
Engineering
Life Sciences
Materials Science
Mathematical analysis
Nondestructive testing
Orientation
Thermography
electromagnetic, thermography
TG 115.28
non-destructive testing (NDT)
numerical simulation
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Summary:The feasibility of electromagnetically stimulated thermography non-destructive testing （NDT） for the detection of defects in metallic conductive materials has been carried out by finite element analysis. Aluminum plates with defects of different diameters, depths, locations, shapes and orientation with respect to eddy current are numerically investigated. ANSYS software is used to solve the coupled electromagnetic and temperature field equations. The peak temperatures on the top surface of circular defects with different diameters and depths are calculated at varying excitation frequencies. It is demonstrated that the obtained temperature inreases with increase of the defect diameter and decrease of its depth. The dependence of the temperature over the top surface of the defect on its location and orientation is also presented. The results indicate that we can detect the subsurface defect and estimate its depth and location by choosing a suitable coil-specimen configuration.
Bibliography:electromagnetic, thermography, non-destructive testing （NDT）, numerical simulation
31-1943/U
The feasibility of electromagnetically stimulated thermography non-destructive testing （NDT） for the detection of defects in metallic conductive materials has been carried out by finite element analysis. Aluminum plates with defects of different diameters, depths, locations, shapes and orientation with respect to eddy current are numerically investigated. ANSYS software is used to solve the coupled electromagnetic and temperature field equations. The peak temperatures on the top surface of circular defects with different diameters and depths are calculated at varying excitation frequencies. It is demonstrated that the obtained temperature inreases with increase of the defect diameter and decrease of its depth. The dependence of the temperature over the top surface of the defect on its location and orientation is also presented. The results indicate that we can detect the subsurface defect and estimate its depth and location by choosing a suitable coil-specimen configuration.
LIU Guo-fei, LI Guo-hua （School of Mechanical, Electronic ＆ Information Engineering, China University of Mining and Technology （Beijing）, Beijing 100083, China）
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ISSN:1007-1172
1995-8188
DOI:10.1007/s12204-011-1140-5