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Information × Registration Number 0225U001473, (0123U100829) , R & D reports Title Calculation of stress concentration near holes in thin-walled members of rocket technology structures made of nonlinear elastic and viscoelastic materials, and assessing its influence on the strength and fracture of these structural members popup.stage_title Оцінка впливу концентраторів напружень та тріщин на довготривале руйнування в’язкопружних композитних елементів конструкцій ракетної техніки. Head Chernyshenko Ivan S., д.т.н. Registration Date 01-02-2025 Organization S.P. Tymoshenka Institute of Mechanics of the National Academy of Sciences of Ukraine popup.description1 Study of the stress-strain state of thin-walled members of rocket under the action of static loads, including: problem formulation; development of linear and non-linear theory; development of methods, algorithms, programs; solving specific classes of problems for shells with stress concentrators; analysis of the obtained results and regularities of mechanical processes in these structural members. popup.description2 A method integrating the finite element method and the cohesive zone model has been developed, which allows calculating the stress-strain state and the propagation of cracks developing over time in structural elements made of linear viscoelastic orthotropic materials and having stress concentrators. Based on this method, an algorithm for implementing this method has been developed and tested. The influence of the mechanical parameters of the composite material and the parameters of the traction-separation law on the stress-strain state and crack development in plates and shells with holes of various configurations has been numerically investigated. Product Description popup.authors ABROSOV Yurii Yu. Babich Stepan Yu. Bahno Oleksandr M. Bohdanova Olha S. Hlukhov Yurii P. Huz Oleksandr M. Zhuk Oleksandr P. Kaminskyi Anatolii O. Kurchakov Yevhen Ye. Mаksymiuk Volodymyr A. Maksymiuk Nina V. Selivanov Mykhailo F. Storozhuk Yevhen A. Tereschenko Lidiia M. Chornoivan Yurii O. Shchuruk Halyna I. popup.nrat_date 2025-02-01 Close