INVESTIGATION OF HIGH ELASTOPLASTIC STRAINING OF SHELLS OF REVOLUTION UNDER COMPLEX TENSILE AND TORQUE LOADING
A. A. Artem'eva, V. G. Bazhenov, D. V. Zhegalov, D. A. Kazakov, E. V. Nagornykh
Research Institute for Mechanics, Nizhny Novgorod, 603950 Russia
aranan@mail.ru
Keywords: осесимметричные оболочки, растяжение и кручение, упругопластичность, большие деформации, численное моделирование, вариационно-разностный метод, явная схема интегрирования, axisymmetric shells, tensile and torque loading, elastoplasticity, high strains, numerical simulation, variational difference method, explicit scheme of integration
Abstract
A method of the numerical solution of nonlinear unsteady problems of axisymmetric elastoplastic straining of shells of revolution with allowance for torque loading at high strains is proposed. The method is based on the geometrically nonlinear theory of the Timoshenko shells and the plasticity theory with due allowance for combined isotropic and kinematic hardening. The problem is solved with the use of the variational difference method. Results of numerical and experimental investigations of elastoplastic straining of cylindrical shells under proportional and sequential kinematic tensile and torque loading are reported.
|
