Open AccessOne approach to the axisymmetric problem of impact of fine shells of the S.P. Timoshenko type on elastic half-space
Author(s) -
Vladislav Bogdanov
Publication year - 2021
Publication title -
transfer of innovative technologies
Language(s) - English
Resource type - Journals
eISSN - 2664-2697
pISSN - 2617-0264
DOI - 10.32347/tit2021.42.0302
Subject(s) - rotational symmetry , discretization , mathematics , shell (structure) , type (biology) , timoshenko beam theory , mathematical analysis , space (punctuation) , rotation (mathematics) , algebraic equation , inertia , volterra integral equation , classical mechanics , integral equation , nonlinear system , physics , finite element method , geometry , computer science , ecology , quantum mechanics , biology , operating system , thermodynamics , materials science , composite material
Refined model of S.P. Timoshenko makes it possible to consider the shear and the inertia rotation of the transverse section of the shell. Disturbances spread in the shells of S.P. Timoshenko type with finite speed. Therefore, to study the dynamics of propagation of wave processes in the fine shells of S.P. Timoshenko type is an important aspect as well as it is important to investigate a wave processes of the impact, shock in elastic foundation in which a striker is penetrating. The method of the outcoming dynamics problems to solve an infinite system of integral equations Volterra of the second kind and the convergence of this solution are well studied. Such approach has been successfully used for cases of the investigation of problems of the impact a hard bodies and an elastic fine shells of the Kirchhoff-Love type on elastic a half-space and a layer. In this paper an attempt is made to solve the axisymmetric problem of the impact of an elastic fine spheric shell of the S.P. Timoshenko type on an elastic half-space using the method of the outcoming dynamics problems to solve an infinite system of integral equations Volterra of the second kind. It is shown that this approach is not acceptable for investigated in this paper axisymmetric problem. The discretization using the Gregory methods for numerical integration and Adams for solving the Cauchy problem of the reduced infinite system of Volterra equations of the second kind results in a poorly defined system of linear algebraic equations: as the size of reduction increases the determinant of such a system to aim at infinity. This technique does not allow to solve plane and axisymmetric problems of dynamics for fine shells of the S.P. Timoshenko type and elastic bodies. This shows the limitations of this approach and leads to the feasibility of developing other mathematical approaches and models. It should be noted that to calibrate the computational process in the elastoplastic formulation at the elastic stage, it is convenient and expedient to use the technique of the outcoming dynamics problems to solve an infinite system of integral equations Volterra of the second kind.