Effect of pitting corrosion position to the strength of ship bottom plate in grounding incident

Ocid Mursid, Tuswan Tuswan*, Samuel Samuel, Andi Trimulyono, Hartono Yudo, Nurul Huda, Haris Nubli, Aditya Rio Prabowo

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Pitting corrosion is the most common, dangerous, and destructive corrosion type in marine and offshore structures. This type of corrosion can reduce the strength of the ship plate, so investigating it using several numerical grounding scenarios is needed to determine the significant degradation of the strength of the structural plate. In this study, a finite element study was used to evaluate the influence of pitting corrosion location on the strength of the bottom plate ship in grounding simulation. This study simulated 14 scenarios using different pitting positions on the bottom plate. Finite element using explicit dynamic simulation in LS Dyna software was employed to evaluate the strength of the bottom plate on the ship. The output parameters, such as reaction force and plate deformation, were assessed to compare the grounding simulation results. The simulation indicates that the location of pitting corrosion will affect stress concentration, crack initiation, reaction force, and penetrating position when the crack nucleates. The result shows the critical position of the pit, which is located near the stress concentration ring (nearly 100 mm from the center of the plates) in the plain plates.
Original languageEnglish
Article number20220199
JournalCurved and Layered Structures
Volume10
Issue number1
Number of pages12
ISSN2353-7396
DOIs
Publication statusPublished - 2023

Keywords

  • Pitting corrosion
  • Finite element
  • Grounding case
  • Location of pitting
  • Ship plate

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