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8 September 2011Numerical analysis and experimental research on active infrared thermographic NDT in composite materials
To estimate the disbond defects of the glass fiber composite materials applied in the solid rocket motor, active infrared
thermographic NDT is researched. Firstly, the numerical analysis of the transient thermal wave distubance under the
pulse heating stimulation is carried out using the finite element method. Then, the special experiment is arranged. The
specimen including 3 disbond defects with diameter 10mm, 20mm and 30mm is pulse heated using 2 symmetric pulse
heating sources, which the stimulation time is 2ms and the pulse energy is 4800J. The surface transient temperature is
monitored by the infrared camera system. Finally, The experimental results are compared with the ultrasonic C-scan.
Our research shows that the infrared thermography is a fast and effective inspection method for detecting defects of the
diameter over 10mm and depth within 5mm in the composite materials.
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Cui-qin Wu, Wei-ping Wang, Qi-gang Yuan, Yan-jun Li, Wei Zhang, Xiang-dong Zhang, "Numerical analysis and experimental research on active infrared thermographic NDT in composite materials," Proc. SPIE 8193, International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, 81930L (8 September 2011); https://doi.org/10.1117/12.898947