Stress state of the walls of two shrink-fitted pipes made from dispersion-hardening aluminum under the action of internal pressure
The stress state of two shrink-fitted pipes assembled with an interference fit made from a dispersion-hardened aluminum alloy loaded with uniform internal pressure is investigated. The magnitude of the contact pressure, as well as the magnitude of the interference fit, allowing to increase the elastic limit of the composite pipe in comparison with solid pipe. It is shown that with increasing temperature and the distance between the hardening particles at the same volume fraction, the limit value of the fit decreases. The limit of elastic resistance of the inner pipe in the case of its small thickness increases linearly with fit increasing. An increase in contact pressure with comparable thicknesses of the outer and inner pipes leads to an increase in stresses in the wall of the outer pipe and contributes to its plastic deformation.