Search academic texts

Information × Registration Number 0223U002798, 0121U110231 , R & D reports Title Investigation of physical and mechanical characteristics of polymer composites at high temperatures and regularities of deformation of multilayer shells under dynamic loading popup.stage_title Head Kucher Mykola K., Доктор технічних наук Registration Date 09-03-2023 Organization GS Pisarenko Institute of Strength Problems of the National Academy of Sciences of Ukraine popup.description2 The purpose of the work 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; on the basis of general equations of dynamic theories of elasticity, plasticity and theories of strength of isotropic and anisotropic materials, which are most widely used in applied works, to conduct a systematic theoretical study and optimization of the one-dimensional stress-strain state and strength of composite and metal-composite cylinders of small, medium and large thickness under loading by a pressure wave from the explosion of an explosive substance in the air inside the shell. In the work, an experimental study of the mechanical characteristics of epoxy woven carbon plastics reinforced with unidirectional carbon fibers during tension and compression was performed. Study of prediction of effective mechanical characteristics and strength parameters of ablative woven polymer carbon-plastics, at high temperatures, based on parameters of unreinforced epoxy matrix and bundle of fibers in the process of thermo-oxidative destruction. Comparison with experimental data obtained during sample tests. With the use of a modified package of applied programs, a systematic numerical study and optimization of the one-dimensional stress-strain state of composite and metal-composite cylinders of small, medium and large thickness under pressure wave loading from the explosion of an explosive substance in the air inside the shell and load simulation using the CONWEP method was carried out. New numerical results were obtained on the effect on the stress-strain state and strength of the total thickness of the shell, the ratio of the thicknesses of the metal and composite layers. Product Description popup.authors popup.nrat_date 2023-03-09 Close