On local strength of a spherical vessel with  pits distributed along the equator

Daria  Okulova; Liana Almazova; Olga Sedova; Yulia Pronina

doi:10.3221/IGF-ESIS.63.08

On local strength of a spherical vessel with pits distributed along the equator

Authors

Daria Okulova Saint Petersburg State University, St.Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034 Russia
Liana Almazova Saint Petersburg State University, St.Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034 Russia https://orcid.org/0000-0001-8695-3598
Olga Sedova Saint Petersburg State University, St.Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034 Russia
Yulia Pronina Saint Petersburg State University, St.Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034 Russia https://orcid.org/0000-0003-4978-6238

DOI:

https://doi.org/10.3221/IGF-ESIS.63.08

Keywords:

Pitting corrosion, Surface defects, Spherical shell, Pressure vessel

Abstract

The effect of multiple shallow corrosion pits on the strength of a spherical vessel subjected to internal pressure is studied. The pits are considered both randomly and evenly distributed along the equator on the outer surface of the vessel. The dependencies of the stress concentration factor on the number of the pits are compared for linearly elastic and elastic-plastic material with hardening. The behavior of the vessels made of elastic and elastoplastic materials turned out to be qualitatively different. The approximation of periodic pits arrangement is discussed.

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Published

21-12-2022

Issue

Vol. 17 No. 63 (2023): January 2023

Section

SI: IGF26 - 26th International Conference on Fracture and Structural Integrity

License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Copyright
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.

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How to Cite

On local strength of a spherical vessel with pits distributed along the equator. (2022). Frattura Ed Integrità Strutturale, 17(63), 70-80. https://doi.org/10.3221/IGF-ESIS.63.08