Corrosion pit-induced stress concentration in spherical pressure vessel

By M. Cerit. Thin-walled structures, 2019

62 citations recorded by the source corpus.

Abstract This paper aims to investigate the effect of pitting corrosion on stress concentration factor (SCF) for a spherical pressure vessel subjected to internal pressure. Stress concentration at semi-elliptical corrosion pit and secondary pit nucleated at bottom of the semi-elliptical base pit are examined systematically by conducting a series of axisymmetric finite element models. SCF occurs at the bottom of the semi-elliptical pits and increases as pit depth enhances but decreases as pit width enlarges. Pit aspect ratio is a principal parameter affecting stress. Presence of a premature pit at the bottom of base pit intensifies the stress distribution and SCF.

Subfields: Materials Chemistry, Mechanical Engineering, Metals and Alloys

View Paper: https://www.semanticscholar.org/paper/6a4dedffbda90d07c15bce6fa0e1b5375f18470c