IDENTIFICATION OF PARAMETERS OF MODELS OF NONLINEAR DEFORMATION OF ISOTROPIC AND COMPOSITE MATERIALS ON THE BASIS OF CALCULATIONS AND EXPERIMENTS AIMED AT ANALYZING THE DYNAMIC BEHAVIOR OF CYLINDRICAL METAL-PLASTIC SHELLS

摘要

A method for identification of material parameters of the constitutive relations of elastoplastic and viscoelastic deformation of isotropic and composite materials is developed. The method is based on minimizing the functional of the residue of results of numerical and experimental analysis of unsteady deformation of structural elements made of examined materials. The method is tested, and prospects of its application for determining material parameters of viscoelastic and elastoplastic models of nonlinear deformation of cylindrical metal-plastic shells under explosive loading are demonstrated.