Irreversible Deformations of a Rotating Cylinder
The problem of acceleration of a cylindrical medium with consideration of irreversible deformation of creep and plasticity is investigated. For comparison, the problem of a rotating cylinder without creep deformation is considered. The problem of elastic deformation is solved analytically for the case of viscoplastic deformation and numerically -for the case of creep deformation. The Norton power low with continuous Mises type potential is used for modeling a process of creep deformation. The viscoplasticity model with Mises type stress potential is used for plastic deformation. When plastic flow occurs, it is assumed that the processes of accumulation of irreversible deformations of plasticity and creep take place together. The conclusions are made about the influence of creep deformation on the final distribution of stress. The significant decrease of stress intensity is observed for cylindrical mediums with rigid inclusion. However, the decrease is less significant for the hollow cylindrical medium. Also, the redistribution of stress intensity without decreasing is observed for the cylindrical medium with two free boundaries.
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