Stress concentration at the areas of corrosion damages in pipelines

摘要

Finite element method and electric stain measurement means were used to study the concentration of stresses in the zone of corrosion damage of pipelines, simulated by the surface of an ellipsoid and a cylinder. It is shown that these defects can create a risk of cyclic elasto-plastic fracture while the required level of static strength is ensured. An approximate dependence for determination of stress concentration in the zone of surface corrosion damage has been determined more precisely.