Reliability analysis of a bulk carrier with the combined effects of corrosion and fatigue cracks

Joe-Ming Yang, Y. J. Xu

Research output: Contribution to journalArticle

Abstract

Generally, the structures of large ships are made of steel, The corrosion and fatigue of the steel may occur due to fluctuating waves and harsh environment. The purpose of this study is to assess the reliability of a ship under extreme loading condition and severe environment. The process of corrosion may be separated into two stages. The first phase is the time period in which the corrosion protection is effective, and corrosion does not occur. The second one starts when the effectiveness of the coating is lost, and general corrosion is developing. Fatigue and corrosion are inevitable in sea-going ships and offshore structures. In order to obtain the accurate reliability of a ship's hull, one should take account of the combined effects of fatigue and corrosion. Both coating life and the time it takes to have a crack initiation are considered as random variables in this study. In the fatigue analysis of a ship's hull, two stages are also investigated. First of all. the reliability is evaluated before the crack initiation. Afterwards, the reliability after crack initiation is also calculated. Finally, based on the combined effects of fatigue and corrosion, the reliability or the probability of failure of a bulk carrier is studied.

Original languageEnglish
Pages (from-to)59-70
Number of pages12
JournalJournal of Taiwan Society of Naval Architects and Marine Engineers
Volume29
Issue number2
Publication statusPublished - 2010 May 1

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Reliability analysis
Corrosion
Ships
Fatigue of materials
Crack initiation
Coatings
Steel
Offshore structures
Corrosion protection
Fatigue cracks
Random variables

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Mechanical Engineering

Cite this

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