Elastoplastic Deformation of Dispersion-Hardened Aluminum Tube Under External Pressure

Abstract

The paper presents research into elastoplastic deformation of a heavy-walled tube made of a dispersion-hardened aluminum alloy, subjected to the external pressure. Mathematical simulation shows that with the decreasing distance between incoherent particles the alloy hardening occurs which leads to the growth in the elastic and plastic resistance limits. In alloys where the distance between strengthening particles is short, a significantly higher pressure is required to achieve the given thickness of the plastic area, than in alloys where this distance is larger. With the increasing temperature of deformation, the thickness of the plastic area increases at the same pressure. In this case, the elastic-plastic interface shifts toward the outer tube wall.