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Information × Registration Number 0226U001401, (0123U100806) , R & D reports Title Creation of methodologies for non-destructive control and technical diagnostics of elements of military equipment based on new informative parameters of fields of different physical nature popup.stage_title Створення методологій неруйнівного контролю та технічної діагностики елементів військової техніки на основі нових інформативних параметрів полів різної фізичної природи Head Nazarchuk Zinoviy T., Доктор фізико-математичних наук Registration Date 26-01-2026 Organization State western scientific center NAS of Ukraine and MES of Ukraine popup.description1 To develop mathematical models, effective calculation schemes and software for acoustic monitoring of the structure of composite materials with thin-walled piezoelectric inhomogeneities; to develop and test a new algorithm of three-step phase-shifting digital speckle interferometry to determine the fields of displacements and deformations of the surface of a structural element under the influence of a dynamic load on it; to create methodologies of non-destructive control and technical diagnostics of structural elements based on informative parameters of influence of fields of various physical nature on structural materials; to form damage models of flat elastic layers with thin defects and to develop analytical and analytical-numerical methods of analysis of the wave fields scattered by them. popup.description2 Mathematical models of the dynamic interaction between a thin piezoceramic inclusion of variable thickness and an elastic medium under axisymmetric torsion of the composite have been developed. Analytical expressions for the wave displacement fields in the elastic medium have been obtained, and an efficient algorithm has been proposed for determining the mechanical and geometrical parameters of such inclusions based on far-field shear wave scattering data. Based on the phenomenon of magnetoelastic acoustic emission, a non-destructive method has been proposed for assessing damage in ferromagnetic materials after long-term operation and for diagnosing volumetric damage in structural elements made of such materials. A methodology has also been developed for conducting investigations of pipeline steels of various technological purposes and special-purpose structures using techniques for evaluating their hydrogen-induced damage. The proposed non-destructive phase-shift correlation speckle interferometry method enables the registration of fast transient processes of changes in the stress–strain state of structural materials during the action of dynamic or cyclic loads. Theoretical analyses have been carried out for a waveguide–resonator damage model of flat elastic layers with thin defects, as well as for the features of numerical determination of elastic field distributions in waveguide damage models of flat layers with thin defects. These analyses are based on solving the diffraction problem of a normally incident SH wave by a thin interfacial defect of finite width in an elastic layer rigidly bonded to a half-space, as well as by an internal defect in a flat layer. An optimal representation of the governing equations and expressions has been obtained for the efficient computation of displacement fields on stress-free surfaces of the layer over a wide frequency range. Product Description popup.authors Yaroslav I. Kunets Dozyslav B. Kuryliak Leonid I. Muravskyi Yevhen P. Pochapskyi Valentyn R. Skalskyi Zinovii T. Nazarchuk Svjatoslava Y. Ryhajlo Marija H. Khomyn Yevgeniy V. Zakharchuk Куць Олександр Григорович Клим Богдан Петрович Roman Andriichuk Valerii V. Matus Oleh Zynyuk Roman Romanyuk popup.nrat_date 2026-01-26 Close