caa a22 4500 60617298X CHVBK 20210128100731.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10921-015-0314-8 doi (NATIONALLICENCE)springer-10.1007/s10921-015-0314-8 A TSR-Based Quantitative Processing Procedure to Synthesize Thermal D-Scans of Real-Life Damage in Composite Structures [Elektronische Daten] [J.-M. Roche, F. Passilly, D. Balageas] A two-step processing procedure of pulse thermography experimental data is proposed to synthesize thermal D-scans of composite materials and structures. The first step consists in the identification of the damaged areas by applying the thermographic signal reconstruction (TSR) technique and the red-green-blue (RGB) projection of a combination of polynomial coefficients. The second step takes full advantage of the correlation between the colors of the resulting TSR-RGB map and the defect depths: a limited number of thermograms (one for each color shade) is analyzed to estimate the emergence times of the contrasts locally created by the defects, which enables to assess their depths and provide a depth-scale to the thermal image, at low cost. Once validated for the quantitative imaging of calibrated defects of known depths, the procedure is applied to actual real-life damage, whether initially introduced by manufacturing processes or induced by external solicitations such as impact, fire exposition or quasi-static mechanical loading. Simple planar plates and more complex structures (stiffened panel, honeycomb sandwich and riveted assembly) are considered. Springer Science+Business Media New York, 2015 Pulse thermography nationallicence Thermal D-scan nationallicence Real-life defects nationallicence TSR processing technique nationallicence Composite nationallicence Roche J.-M The French Aerospace Lab, Composite Materials and Structures Department, ONERA, 92320, Châtillon, France aut Passilly F. The French Aerospace Lab, Composite Materials and Structures Department, ONERA, 92320, Châtillon, France aut Balageas D. I2M, TREFLE Department, UMR 5295, University of Bordeaux, 33400, Talence, France aut Journal of Nondestructive Evaluation Springer US; http://www.springer-ny.com 34/4(2015-12-01), 1-15 0195-9298 34:4<1 2015 34 10921 https://doi.org/10.1007/s10921-015-0314-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10921-015-0314-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Roche J.-M The French Aerospace Lab, Composite Materials and Structures Department, ONERA, 92320, Châtillon, France aut NATIONALLICENCE 700 1- Passilly F. The French Aerospace Lab, Composite Materials and Structures Department, ONERA, 92320, Châtillon, France aut NATIONALLICENCE 700 1- Balageas D. I2M, TREFLE Department, UMR 5295, University of Bordeaux, 33400, Talence, France aut NATIONALLICENCE 773 0- Journal of Nondestructive Evaluation Springer US; http://www.springer-ny.com 34/4(2015-12-01), 1-15 0195-9298 34:4<1 2015 34 10921