8 April 2010 Application of line scanning thermography for the detection of interlaminar disbonds in sandwich composite structures
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Abstract
An innovative Line Scanning Thermography (LST) inspection method is being developed as part of a Structural Damage Assessment System to access the health of in-service composite structures. The system utilizes a line heat source to thermally excite the surface inspected and an infrared detector to record the transient surface temperature variation and to detect regions of increased heat resistance associated to interlaminar disbonds, cracks and other imperfections found in composites structures. In this study our efforts towards the applications of LST for the analysis of carbon fiber sandwich composites will be discussed. The LST technique provides a quick and efficient methodology to scan wide areas rapidly. The scanning protocols developed for the detection of sub-surface disbonds (delamination) in composite sandwich parts will be presented. The results presented correspond to scans of test coupons with manufactured defects.
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Obdulia Ley, Simon Chung, Jaco Schutte, Anthony Caiazzo, Valery Godinez, Bruce Bandos, "Application of line scanning thermography for the detection of interlaminar disbonds in sandwich composite structures", Proc. SPIE 7649, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2010, 76491B (8 April 2010); doi: 10.1117/12.847542; https://doi.org/10.1117/12.847542
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