Prediction of fatigue crack growth in offshore structures using a sea state equivalent stress concept

L. S. Etube, F. P. Brennan, W. D. Dover

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

Existing fracture mechanics models and fatigue crack growth prediction methods generally rely on using the overall equivalent stress range with a suitable crack growth law for fatigue crack growth prediction under variable amplitude loading. This paper presents a new fracture mechanics based model for predicting fatigue crack growth in offshore structures. The model relies on the use of measurable sea state properties to determine crack growth associated with each sea state over its duration. It uses the principle of equivalent stress range but limited to a sea state. This approach is more representative of fatigue damage under service conditions and has the added capability of allowing the inclusion of any sea state interaction effects which may be anticipated.

Original languageEnglish
Title of host publicationProceedings of the International Offshore and Polar Engineering Conference
Pages95-101
Number of pages7
Volume4
Publication statusPublished - 1 Jan 1998
EventProceedings of the 1998 8th International Offshore and Polar Engineering Conference. Part 3 (of 4) - Montreal, Can
Duration: 24 May 199829 May 1998

Conference

ConferenceProceedings of the 1998 8th International Offshore and Polar Engineering Conference. Part 3 (of 4)
CityMontreal, Can
Period24/05/9829/05/98

Keywords

  • crack propagation
  • fatigue of materials
  • fracture mechanics
  • mathematical models
  • seawater effects
  • stress analysis
  • offshore structures

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