Abstract
Thermal nondestructive evaluation (TNDE) methods are based on measurement of the surface temperature response of a test piece to externally applied stimulation. Modern methods typically use and infrared (IR) camera to measure temperature, and differ in the manner in which the excitation energy interacts with the sample, and how the sample returns to equilibrium after excitation. Approaches for flaw detection and quantitative characterization in composite structures and materials are presented, including signal processing and analysis, and fundamentals of IR camera operation. Examples include detection of trapped water, foreign object debris, and impact damage in composite materials are presented.
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