Розклинювання підінтерфейсної тріщини пластичним наплавленням

Abstract

The model problem of tension of a two-layer cylinder with an annular subcladding crack located at the base material of the cylinder is considered. It is assume that the base material of the cylinder is linear elastic. The cladding of the cylinder is considered as elastic-plastic with bilinear strengthening. The base material of the cylinder is considered to be linear-elastic, the cladding is considered to be elastic-plastic with bilinear strengthening. The dependence of the stress intensity factor on the internal crack front on the value of the tension stresses and the magnitude of the residual strains in the cladding is investigated. The problem was solved numerically using the finite element method. It was established that the plastic zone in cladding does not develop in the direction of crack extension, but at some angle to it. A preliminary analysis of the stress state in the absence of a crack made it possible to explain this phenomenon, as well as some other regularities obtained in the numerical results. The conclusions presented in the work can be useful in evaluating of the crack resistance of equipment and pipes with anti-corrosion cladding.