&lt;title&gt;NDE of composite materials by thermal method and shearography&lt;/title&gt;

Bison, P.; Bressan, Chiara; Cavaccini, Giovanni; Ciliberto, A.; Grinzato, E.

doi:10.1117/12.271646

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1998

2022

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“…The phase images have been reported as reducing the effects of uneven surface heating and being highly sensitive to defects processing tool for nondestructive inspection 7, 8 . The phase is calculated as…”

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confidence: 99%

<title>Advanced image processing for defect visualization in infrared thermography</title>

Yuri

William

1998

SPIE Proceedings

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Results of a defect visualization process based on pulse infrared thermography are presented. Algorithms have been developed to reduce the amount of operator participation required in the process of interpreting thermographic images. The algorithms determine the defect's depth and size from the temporal and spatial thermal distributions that exist on the surface of the investigated object following thermal excitation. A comparison of the results from thermal contrast, time derivative, and phase analysis methods for defect visualization are presented. These comparisons are based on three dimensional simulations of a test case representing a plate with multiple delaminations. Comparisons are also based on experimental data obtained from a specimen with flat bottom holes and a composite panel with delaminations.

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confidence: 99%