We consider the characteristic features of Fourier analysis of thermal processes that occur during dynamic thermal examination, using pulsed and modulated thermal excitation. The results of one-dimensional and two-dimensional analysis are compared. Tests of carbon-fiber-reinforced composites showed that a thermal wave penetrates 40-70% deeper into the product than the absolute value of its amplitude. Theoretical calibration curves of the phase shift versus the depth of defects in carbon-fiber-reinforced products were applied to the experimental data to synthesize phase thermal tomograms.
Pulsed phase thermography and Fourier-analysis thermal tomography
S Marinetti
1999
Abstract
We consider the characteristic features of Fourier analysis of thermal processes that occur during dynamic thermal examination, using pulsed and modulated thermal excitation. The results of one-dimensional and two-dimensional analysis are compared. Tests of carbon-fiber-reinforced composites showed that a thermal wave penetrates 40-70% deeper into the product than the absolute value of its amplitude. Theoretical calibration curves of the phase shift versus the depth of defects in carbon-fiber-reinforced products were applied to the experimental data to synthesize phase thermal tomograms.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
