Review of Research Progress of Prestressed Treatment to the Thick-Walled Cylindrical Parts

Abstract

The mechanical properties of single layer thick-walled cylinder under the working condition and common failure forms were analyzed, and the results showed that there’s limitation to improve the load supporting capacity only by increasing the wall thickness and the strength of materials. The effective way to improve the stress distribution of single layer thick-walled cylinder is to make the cylinder forced by prestressing. The prestress on the cylinder can counterbalance a portion of the working tensile stress. Firstly, this paper describes the structural of prestressed cylinder of multilayer shrink-on and points out its disadvantage. Secondly, based on the shrink-on cylinder, three kinds of improved cylinder structure of split block shrink-on type, autofrettaged shrink-on type and wire intertwined type are elaborated. The principle, the key technology and the process methods of prestressed processing are parsed. Finally, research directions on the innovative cylinder structure with high load supporting capacity are put forward.