Technical Diagnostics and Non-Destructive Testing, 2023, №04



2023 №04 (04)

DOI of Article 10.37434/tdnk2023.04.05

2023 №04 (06)

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Technical Diagnostics and Non-Destructive Testing #4, 2023, pp. 33-41

Development of optical-digital methods for non-destructive testing of aerospace thin-walled shell structures (Review)

L.I. Muravsky

G.V. Karpenko Physico-Mechanical Institute of NASU. 5 Naukova str., 79060, Lviv, Ukraine. E-mail:muravskyleon@gmail.com

A series of studies on diagnostics and non-destructive control of the stress-strain state of thin-walled cylindrical shell structures of aerospace engineering by optical-digital methods, in particular, three-dimensional (3D) digital image correlation (DIC) and laser photogrammetry methods, are described. The effectiveness and continuous improvement of these methods over the past decades have been noted. The results of experimental studies of composite and metal shell structures using the methods of 3D DIC are considered. The advantages of 3D DIC methods for simultaneous measurements of surface displacement and deformation fields using several digital image correlators located around the shell structure, over those 3D or 2D CCD methods that provide simultaneous registration of only a local area of the investigated surface using one correlator, were analyzed. The effectiveness of these methods for nondestructive testing of the dynamics of changes in the processes of the surface deformation and destruction under axial and radial loads, as well as for evaluating the knockdown factor of the thin-walled shell structure, is shown. 44 Ref., 3 Fig.
Keywords: shell structure, 3D digital image correlation, digital image correlator, composite cylindrical shell, metal cylindrical shell, knockdown factor, axial loads, radial loads

Received 06.10.2023

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