Search academic texts

Information × Registration Number 0226U000136, (0123U100936) , R & D reports Title Development of methods for estimating the limit state of anisotropic bodies with cracks, cuts and healed defects and establishing their serviceability resource popup.stage_title Розроблення методів оцінювання граничного стану анізотропних тіл з тріщинами, вирізами і залікованими дефектами та встановлення ресурсу їх роботоздатності Head Sylovaniuk Viktor P., д.т.н. Registration Date 05-01-2026 Organization Physico-Mechanical Institute named after GV Karpenko of the National Academy of Sciences of Ukraine popup.description1 The purpose of scientific research is: a) establishment of risks of destruction of elements of structures and structures made of anisotropic materials due to the development of cracks in the vicinity of various types of stress concentrators under the influence of external force factors; b) the development of technologies for healing defects and restoring the functionality of elements of structures and buildings damaged by cracks, including as a result of hostilities; c) recommendations for the effective protection of civil and defense constructions from destruction due to explosions, projectiles, etc.; development of measures aimed at protecting military and civilian personnel from being damaged by fragments of buildings and defense structures in the event of an explosion. popup.description2 Object of the study – anisotropic elastic and elastic-plastic bodies with cracks, holes, inclusions and healed cracks, rolling pairs. Purpose of the work – to identify the risks of failure of structural and civil engineering components made of anisotropic materials due to crack growth in the vicinity of various types of stress concentrators under external mechanical loading; to further develop methods for assessing the effectiveness of defect healing and for restoring the load-carrying capacity of structural and civil engineering elements damaged by cracks, including those resulting from military actions. Research methods – methods of singular integral and integro-differential equations, the theory of functions of a complex variable, potential theory, and mechanical quadrature techniques, finite element method. Main results:  An advanced formulation of the method of singular integral equations has been developed for two-dimensional problems of the theory of elasticity and fracture mechanics of piecewise homogeneous anisotropic bodies containing cracks, holes, and inclusions. Systems of first- and second-kind integral equations have been constructed and solved numerically by quadrature methods. On this basis, the distributions of contact and tangential longitudinal shear stresses along material interfaces have been investigated, and an analysis of stress intensity factors at the tips of curvilinear cracks in piecewise homogeneous anisotropic bodies has been performed for various geometric and mechanical parameters of the problem.  Mathematical models of anisotropic elastoplastic bodies damaged by cracks and strengthened using injection-based technologies have been developed. Solutions to new classes of problems for anisotropic bodies with filled cracks and inclusions have been obtained. The residual strength of tranversely isotropic (transversely isotropic) bodies with healed defects has been evaluated. Product Description popup.authors Viktor P. Sylovaniuk Mykhaylo P. Savruk Volodymyr S. Kravets Olexandra P. Datsyshyn Nataliia A. Ivantyshyn Volodymyr M. Yuzevych Andrii B. Chornenkyi Liubov Y. Onyshko Hryhorij P. Marchenko Maksym V. Filipov popup.nrat_date 2026-01-05 Close