Non-destructive testing of the air screw blade's filler and permanent connections made from polymer composite material

Murashov V.V., Yakovleva S.I.
UDC
620.179.1:621.792.05
DOI
10.18577/2307-6046-2018-0-10-83-92
Article PDF (Russian) (757.62 KB)
How to cite
Murashov V.V., Yakovleva S.I. Non-destructive testing of the air screw blade's filler and permanent connections made from polymer composite material // Proceedings of VIAM. 2018. No. 10. DOI: 10.18577/2307-6046-2018-0-10-83-92. URL: https://test.viam.ru/en/journal/2018/10/10
Keywords
low-frequency acoustic methods, acoustic free vibration method, blade of air screw, polymer composite materials, continuity violations.
Abstract

Influence of defects like violation of continuity of the foam filler of the composite blade on spectral characteristics of elastic oscillations of surface of object of the control, raised by shock impulses is investigated at control, and influence of defects in zones of connection of heating pad with the composite blade on spectral characteristics of elastic oscillations of surface of the pad, raised at control. It is shown that in zones of availability of cracks in foam plastic and in zones of violation of connection of heating pad with the composite blade the range of the accepted oscillations that is sign of availability of defect significantly changes and allows revealing with high reliability defects.

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