Damage inspection of CFRP using resistive-heating thermographic NDT

Takahide Sakagami; Keiji Ogura; Shiro Kubo

doi:10.1117/12.235392

15 March 1996 Damage inspection of CFRP using resistive-heating thermographic NDT

Takahide Sakagami, Keiji Ogura, Shiro Kubo

Proceedings Volume 2766, Thermosense XVIII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications; (1996) https://doi.org/10.1117/12.235392
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

Thermographic NDT, which is a technique in NDT based on the surface temperature distribution in heated solids, was applied for the inspection of locally damaged CFRP plate samples under the lateral contact loading followed by cyclic bending. A singular method and an insulation method were examined. The singular method, in which a heat concentration at flaw tips was detected under resistive heating by electric current, was found to be sensitive to the failure, fracture or break in carbon fibers. On the other hand, the insulation method, in which the perturbation in the surface temperature distribution was detected under stream heating by hot air, was found to be successfully applicable to the inspection of the subsurface delamination damage in CFRP. The detected damages by the thermographic NDT were compared with those observed by SAM (scanning acoustic microscope).

Citation Download Citation

Takahide Sakagami, Keiji Ogura, and Shiro Kubo "Damage inspection of CFRP using resistive-heating thermographic NDT", Proc. SPIE 2766, Thermosense XVIII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (15 March 1996); https://doi.org/10.1117/12.235392

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