LIMIT LOAD OF AN AXIALLY CRACKED PIPE UNDER COMBINED PRESSURE BENDING AND TENSION

摘要

The use of limit loads of structures containing defects is widely spread in flaw assessment. In the case of an axially cracked pipe, tension and bending do not contribute to the elastic opening of the crack lips, but increase the level of plasticity, and a safe J estimation requires a full expression of the limit load, including all applied loadings, even when they have no influence on the elastic J estimation. The aim of the present paper is to propose a lower bound estimation method for the global collapse of an axially cracked cylinder, based on the shell Von Mises yield criterion, under pressure tension and bending.