Abstract
A 3D geometrically and physically nonlinear problem of elastoplastic deformation of internal transportation containers of a fast neutron reactor in the event of an accidental fall on a rigid base is considered. To describe the deformation of the structure, a current Lagrangian formulation is used. The equation of motion is derived from the balance of virtual work capacities. Relations of the theory of flow with kinematic and isotropic hardening are used as equations of state. The contact interaction of the container with a rigid base is described by non-interaction conditions. The problem is analyzed using FEM and an explicit cross-type time-integration scheme. The results of the numerical analysis are presented. The use of the FE-analysis of the considered problem at the design stage made it possible to optimize the design of the container and to reduce its metal consumption by minimizing the unreasonably high design margin of safety, remaining in the framework of radiation safety conditions. Keywords: reactor, radioactive materials, transportation container, accidental fall, plastic strains, strength, FEM.
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