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Probabilistic Study of the Effects of Leaving Fatigue Cracks Unrepaired in a Ship

[+] Author Affiliations
J. S. Kent, P. K. Das, N. D. P. Barltrop

Universities of Glasgow and Strathclyde, Glasgow, UK

J. D. G. Sumpter

QinetiQ, Rosyth, UK

Paper No. OMAE2002-28400, pp. 301-308; 8 pages
doi:10.1115/OMAE2002-28400
From:
  • ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering
  • 21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 2
  • Oslo, Norway, June 23–28, 2002
  • Conference Sponsors: Ocean, Offshore, and Arctic Engineering Division
  • ISBN: 0-7918-3612-6 | eISBN: 0-7918-3599-5
  • Copyright © 2002 by ASME

abstract

A methodology to quantify the risk of leaving fatigue cracks unrepaired while a ship is in service is described. The basic variables used and the approaches to quantify their variability are described. Three different methods have been used to characterize the variation in toughness values between plates. Two of these keep the sampled toughness value constant as the crack grows while the third, a variable toughness model, tries to account for the variation in the toughness values as the crack grows. Preliminary results are also presented and the reasons for the results are discussed.

Copyright © 2002 by ASME
Topics: Fatigue cracks , Ships

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