Abstract: The elastoplastic assembly stresses in elastic-perfectly plastic hollow roll with axle sleeve (a kind of structure with double-interference-fit construction) of the paper machine are studied by using the plasticity theory. Considering the influence of centrifugal force of inertia (design speed), the analytical solutions based on the concept of equal-strength design are obtained. The solutions include the general expressions of relationships between stresses and design parameters as well as the general formula for calculating the elastic-plastic design speed. The example gives the matched parameters diagram of a cast steel roll. The elastic-plastic stress distribution curves for certain structural parameters are also given. The further calculation results show that the maximum stresses in the roll body and the axle sleeve are nearly independent of the ratio of inner to outer diameter of the roll body for fixed ratio of axle journal diameter to outer diameter of the roll body. The present analytical solutions are expected to be useful in the elastic-plastic design of a rotating elastic-perfectly plastic component with double-interference-fit construction.

Key words: Double-interference-fit construction, Elastic-plastic analysis, Hollow rolls of paper machine, Ideal elastic-plastic material