Fatigue assessment of a large container ship considering the effect of thickness and material

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Along with rapid increase in the size of container ship for a few decades, it is required to use thicker plates in way of the hatch coaming than before. The use of higher tensile steel with yield strength 460 MPa is also inevitable to avoid using excessively thick plates. According to the recommendation of IIW and rule requirements of classification societies, it is defined that fatigue strength of welded joints is independent of the tensile strength and the effect of plate thickness is considered by mean of a correction exponent. Recently, to investigate the effect of plate thickness and tensile strength on fatigue strength for the weld joints, series of fatigue test were conducted on the specimens of butt weld joint and longitudinal fillet weld joint with the different plate thickness and tensile strength steel. From the test results of each series of specimens which were taking into account recent developments concerning material and welding techniques, the effect of plate thickness and material was investigated. In addition, considering the effect derived from this fatigue test, fatigue strength was calculated on butt weld joints and longitudinal fillet weld joints in way of hatch coaming top plate for a large container ship.

Original languageEnglish
Title of host publicationProceedings of the 21st (2011) International Offshore and Polar Engineering Conference, ISOPE-2011
Pages915-920
Number of pages6
StatePublished - 2011
Externally publishedYes
Event21st International Offshore and Polar Engineering Conference, ISOPE-2011 - Maui, HI, United States
Duration: 19 Jun 201124 Jun 2011

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Conference

Conference21st International Offshore and Polar Engineering Conference, ISOPE-2011
Country/TerritoryUnited States
CityMaui, HI
Period19/06/1124/06/11

Keywords

  • Fatigue strength
  • Fatigue tests
  • Hatch coaming
  • Material effect
  • S-N curve
  • Thickness effect
  • Thickness exponent

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