Frequency-modulated thermal wave imaging for non-destructive testing of carbon fiber-reinforced plastic materials

Phase-based methods of active thermographic studies provide deeper subsurface details and reduce non-uniform emissivity problems in defect detection. In this contribution analysis of subsurface anomalies has been carried out by probing a suitable frequency component with sufficient energy. This pape...

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Bibliographic Details
Published in:Measurement science & technology 2011-10, Vol.22 (10), p.104018-1-4
Main Authors: Ghali, V S, Mulaveesala, R, Takei, M
Format: Article
Language:English
Subjects:
Carbon fiber reinforced plastics
Defects
Energy use
Nondestructive testing
Signal to noise ratio
Supplying
Thermal wave imaging
Thermography
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Description
Summary:Phase-based methods of active thermographic studies provide deeper subsurface details and reduce non-uniform emissivity problems in defect detection. In this contribution analysis of subsurface anomalies has been carried out by probing a suitable frequency component with sufficient energy. This paper highlights the comparative analysis of different thermographic schemes on the basis of supplying equal energy to the chosen frequency used for the analysis of a given carbon fiber-reinforced plastic sample used in experimentation. Experiments have been carried out to find the detection ability of different excitation schemes, and comparisons have been made by taking the signal-to-noise ratio of the defects into consideration.
ISSN:0957-0233
1361-6501
DOI:10.1088/0957-0233/22/10/104018