The strengthening of a hollow cylindrical tube by using rotational autofrettage is investigated. The problem statement is based on the theory of infinitesimal elastic-plastic deformations, the unified yield criterion, the associated flow rule and the law of linear isotropic hardening. During unloading, the cylinder material can exhibit the Bauschinger effect. Exact analytical solutions are obtained for the stages of loading, unloading and operation. It is established that the material parameter reflecting the influence of the intermediate principal stress has a significant effect on the stress-strain state in the cylinder and the choice of optimal autofrettage parameters.
Prokudin et al. (Wed,) studied this question.
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