Abstract
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.
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References
Li Guo-hua, Wu Miao. Modern non-destructive testing & evaluation [M]. Beijing, China: Chemical Industry Press, 2009 (in Chinese).
Zbigniew S, Robert A, Andrzej N, et al. Infrared detection of delaminations using induction heating [J]. IEEE Transactions on Components and Packaging Technologies, 2004, 27(1): 112–116.
Wilson J, Tian Gui-yun, Abidin I Z, et al. Modelling and evaluation of eddy current stimulated thermography [J]. Nondestructive Testing and Evaluation, 2010, 25(3): 205–218.
Zenzinger G, Bamberg J, Satzger W, et al. Thermographic crack detection by eddy current excitation [J]. Nondestructive Testing and Evaluation, 2007, 22(2–3): 101–111.
Tsopelas N, Siakavellas N J. Electromagneticthermal NDT in thin conducting plates [J]. NDT & E International, 2006, 39(5): 391–399.
Tsopelas N, Siakavellas N J. Performance of circular and square coils in electromagnetic-thermal nondestructive inspection [J]. NDT & E International, 2007, 40(1): 12–28.
Louaayou M, Naït-Saïd N, Louai F Z. 2D finite element method study of the stimulation induction heating in synchronic thermography NDT [J]. NDT & E International, 2008, 41(8): 577–581.
Biju N, Ganesan N, Krishnamurthy C V, et al. Frequency optimization for eddy current thermography [J]. NDT & E International, 2009, 42(5): 415–420.
Kumar C N K, Krishnamurlhy C V, Maxfield B W, et al. Tone burst eddy-current thermography (TBET)[C]// Proceedings of AIP Conference on Review of Progress in Quantitative Nondestructive Evaluation. Melville, USA: American Institute of Physics, 2009: 544–551.
Louaayou M, Fouladgar J, Saidi T, et al. Electromagnetic stimulation in NDT thermography [C]//Proceedings of The 12th Biennial IEEE Conference on Electromagnetic Field Computation Digest Book. Miami, FL, USA: IEEE, 2006: 252.
Oswald-Tranta B. Thermo-inductive crack detection [J]. Nondestructive Testing and Evaluation, 2007, 22(2–3): 137–153.
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Foundation item: the National Natural Science Foundation of China (No. 51075388), and the Fundamental Research Funds for the Central Universities (No. 2009KJ05)
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Liu, Gf., Li, Gh. Numerical simulation of defect inspection using electromagnetically stimulated thermography. J. Shanghai Jiaotong Univ. (Sci.) 16, 262–265 (2011). https://doi.org/10.1007/s12204-011-1140-5
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DOI: https://doi.org/10.1007/s12204-011-1140-5