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Proceedings Paper

Simulating thermal NDT of bonded structures by FEM
Author(s): Guo Xingwang; Qie Fang
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Paper Abstract

Characteristics of heat transfer and signal evolution in thermal nondestructive testing (TNDT) in aluminum adhesively-bonded structures were studied by computer simulation based on the finite element method (FEM). The TNDT mathematical model of bonded structures was constructed in cylindrical coordinates. The evolutions of TNDT informative parameters versus defect size and depth were simulated by using the FEM analysis software ANSYS. Some simple regression expressions were obtained for the relations between the informative parameters and the defect parameters. It is shown that, at a fixed defect depth, the four informative parameters including the maximum differential temperature, maximum contrast, differential temperature peak time and best observation time, are linearly proportional to defect radius respectively. However, if defect radius is fixed, the maximum differential temperature and maximum contrast become a non-linear function of defect depth, and the differential temperature peak time and best observation time are linearly proportional to defect depth. It is believed that the obtained results may be of help in developing an inspection strategy for aviation aluminum panels.

Paper Details

Date Published: 17 March 2008
PDF: 12 pages
Proc. SPIE 6939, Thermosense XXX, 69391H (17 March 2008); doi: 10.1117/12.779942
Show Author Affiliations
Guo Xingwang, Beihang Univ. (China)
Qie Fang, Beihang Univ. (China)

Published in SPIE Proceedings Vol. 6939:
Thermosense XXX
Vladimir P. Vavilov; Douglas D. Burleigh, Editor(s)

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