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Information × Registration Number 0221U102690, 0117U002233 , R & D reports Title Numerical investigation of the stress-strain state and strength of hollow metalkomposite cylinders and spheres under internal explosion loading popup.stage_title Head Lepikhin Petro P, Romashchenko Volodymyr A, к.т.н. Registration Date 08-02-2021 Organization G.S. Pisarenko Institute for Problems of Strength of the National Academy of Sciences of Ukraine popup.description2 Based on the general equations of dynamic theories of elasticity, plasticity and strength theories of isotropic and anisotropic materials, which are most widely used in applied work, a systematic theoretical study and optimization of one-, two- and three-dimensional stress-strain state (SSS) and strength of hollow composite and metal-composite (MC) thick-walled cylinders of finite length and spheres under load by a pressure wave from the explosion of an explosive in the air inside the shell. The report received the following new results. It has been analytically proved that it is incorrect to apply the criteria for the strength of maximum stresses and strains for orthotropic materials when calculating the strength of isotropic and transtropic composites, as well as composite materials (CM) with a plane of weak or medium anisotropy, and it has been shown on specific examples that for such materials these criteria can give significant error. A systematic numerical study and optimization of one-, two-, and three-dimensional stress-strain state and strength of hollow composite and MC cylinders and spheres was carried out using the modified in this work package of applied programs (MPAP) and the educational version of the LS-DYNA program under loading by a pressure wave from the explosion of an explosive in air inside the shell and by modeling the loading by the CONWEP method. New numerical results have been obtained on the influence on the stress-strain state and strength of the location of the explosive charge inside the cylindrical shell, multilayer structure, reinforcement schemes, edge and wave effects, the weight of the explosive charge, and destruction modes. The optimal (most rational) reinforcement schemes have been determined. The effect of contact conditions and the gap between the metal and composite layers on the plane deformed stress-strain state and the strength of a two-layer MC cylinder, etc. Product Description popup.authors popup.nrat_date 2021-02-08 Close