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Information × Registration Number 0225U003133, (0123U102205) , R & D reports Title Numerical study of the influence of the physical and mechanical characteristics of composite materials on the stress-strain state and strength of metal composite shells under dynamic loading and composite materials at high temperatures popup.stage_title Чисельне дослідження впливу фізико-механічних характеристик складових композиційних матеріалів на напружено-деформований стан і міцність металокомпозитних оболонок при динамічному навантаженні та композитних матеріалів за високих температур Head Kucher Mykola K., д.т.н.Tarasovska Svitlana O., к.т.н. Registration Date 22-05-2025 Organization GS Pisarenko Institute of Strength Problems of the National Academy of Sciences of Ukraine popup.description1 The purpose of the work is research based on the general equations of the dynamic theories of elasticity and plasticity of an anisotropic body, the generalized Mises strength criterion using the previously developed by the authors of the application program package (PPP) in the one-dimensional case of the influence of the physical and mechanical characteristics of the reinforcing elements and the matrix and their volumetric composition on the stress-strain state (SST) and strength of composite and metal-composite cylinders under internal explosive loading. Another goal is to study the physical and mechanical characteristics of polymer composite materials at high temperatures, taking into account the processes of thermo-oxidative destruction and ablation processes. popup.description2 The study analyzes unidirectionally reinforced composite materials, with elastic and strength characteristics determined using Chamis's analytical method. It investigates how the stress-strain state and strength of cylindrical bodies made from these materials vary depending on fiber volume fraction under internal pressure from a spherical explosive charge. Three strength criteria for orthotropic bodies are examined: Hoffman, maximum stress, and generalized von Mises. The findings show that the von Mises and Hoffman criteria are unsuitable for evaluating the strength of the studied composites, while the maximum stress criterion provides physically consistent results. This criterion is recommended for analyzing the strength of hollow composite and metal-composite cylinders under internal pressure. Using this criterion, a numerical study explores the reinforcement of a cylindrical metal-composite bilayer shell of constant total thickness under dynamic internal pressure from an explosion. Optimal metal layer thicknesses and composite properties are identified to maximize load-bearing capacity. A mathematical model is also developed to predict the deformation and strength of ablative woven layered composites at high temperatures (up to 1500 °C). The model evaluates the accuracy of elasticity predictions, considering ablation and thermal degradation. Changes in composite density at high temperatures are described using thermogravimetric analysis curves obtained at a fixed heating rate.  Product Description popup.authors Yeremenko Oleksandr O. Avramenko Dmytro S. Beiner Oleh S. Danylchuk Yevhen L. Dolhov Mykola A. Kucher Mykola K. Lepikhin Petro P. Romashchenko Volodymyr A Tarasovska Svitlana O. Chyzhyk Oleh O. Yakovleva Olena S. popup.nrat_date 2025-05-22 Close