SHADOW NON-CONTACT TESTING OF BOND FAILURE WITH USE OF THE FREQUENCY-MODULATED OSCILLATIONS

D.A.Kondrashov,V.G.Efimov, A.N.Galakhov, A.V.Finazhin, A.N. Okhotnikova
DOI: 10.25699/SSSB.2019.25.27634 Download PDF
Index terms: large-sized articles, bond failure testing, frequency modulation, signal/noise relation.
Abstract: The shadow variant of a ultrasonic testng of large-sized articles from polymeric composit materials is presented. By modelling it is shown that application of the continuous frequency-modulated oscillations provides increase of the a signal/noise relation of 0,6 to 3-5. Use broadband gas-jet emitters allows to find out failure in multilayered articles with thickness of the filler to 1м.

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