Pulsed thermography detection of water and hydraulic oil intrusion in the honeycomb sandwich structure composite

Shi-bin Zhao; Cun-lin Zhang; Nai-ming Wu

doi:10.1117/12.900716

8 September 2011 Pulsed thermography detection of water and hydraulic oil intrusion in the honeycomb sandwich structure composite

Shi-bin Zhao, Cun-lin Zhang, Nai-ming Wu

Author Affiliations +

Proceedings Volume 8193, International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications; 819337 (2011) https://doi.org/10.1117/12.900716
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Water and hydraulic oil intrusion inside honeycomb sandwich Structure Composite during service has been linked to in-flight failure in some aircraft. There is an ongoing effort to develop nondestructive testing methods to detect the presence of water and hydraulic oil within the sandwich panels. Pulsed thermography(PT) represents an attractive approach in that it is sensitive to the change of thermal properties. Using a flash lamp PT, testing can be applied directly to the surface of the panel. The viability of PT is demonstrated through laboratory imaging of both water and hydraulic oil within sandwich panels. The detection of water and hydraulic oil intrusion using a one-sided flash lamp PT is presented. It is shown that simple detection, as well as spatial localization of water and hydraulic oil within sandwich panels, and assign the quantity of water and hydraulic oil is possible.

Citation Download Citation

Shi-bin Zhao, Cun-lin Zhang, and Nai-ming Wu "Pulsed thermography detection of water and hydraulic oil intrusion in the honeycomb sandwich structure composite", Proc. SPIE 8193, International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, 819337 (8 September 2011); https://doi.org/10.1117/12.900716

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