InfraRed image correlation for non-destructive testing and evaluation of delaminations in glass fibre reinforced polymer materials.

• Infrared Image Correlation for Detection of Delaminations in GFRP sample. • Comparison on defect detection capabilities of FMTWI and DFMTWI techniques. • Comparison among the depth resolvability of time and frequency domain based analysis schemes. InfraRed Thermography (IRT) is one of the widely used Non-destructive Testing and Evaluation (NDT&E) method for characterization of fiber reinforced polymers. Among verity of testing methodologies and associated post processing schemes recently proposed pulse compression favorable thermal wave imaging methodologies gain importance due to their merits. This present paper highlights a highly depth resolved Frequency Modulated Thermal Wave Imaging (FMTWI) and its digitized version named as Digitized Frequency Modulated Thermal Wave Imaging (DFMTWI) for identification of subsurface Teflon patches introduced as defects to simulate the delaminations at various layers of GFRP test specimen of various sizes and depths. [ABSTRACT FROM AUTHOR]