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2020 №03 (01) DOI of Article
2020 №03 (03)

Technical Diagnostics and Non-Destructive Testing 2020 #03
Technical Diagnostics and Non-Destructive Testing #3, 2020, pp. 16-22

New procedures and technical means of control and extension of service life of metal-composite joints of aviation equipment

L.I. Muravskyi, T.I. Voronyak, Ya.L. Ivanytski, M.M. Gvozdyuk, O.P. Maksymenko, O.G. Kuts, I.V. Stasyshyn, G.I. Gaskevych, O.D. Suriadova
G.V. Karpenko Physico-Mechanical Institute of NAS of Ukraine. 5 Naukova str., 79060, Lviv, Ukraine. E-mail: muravskyleon@gmail.com

A procedure was developed for detection of subsurface defects in layered composite structures by tracing dynamic changes of optical speckles on surface images directly above the defect under the impact of resonance ultrasonic excitation, as well as a procedure for determination of deformation fields near loaded holes in composites for different modes of their drilling, using a portable optico-digital correlator. The paper gives the results of investigations on determination of crushing stresses in multirow «composite-metal» bolted joints by deformation in the vicinity of an isolated hole, contact-loaded through a bolt. 13 Ref., 2 Tabl., 9 Fig.
Keywords: subsurface defects, composite panel, metal-composite joints, speckle-images, dynamic speckles, ultrasonic excitation, hole elongation, digital correlation of images, crushing stresses, bolted joints, deformation field

Received: 08.07.2020


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