Journal
RELIABILITY ENGINEERING & SYSTEM SAFETY
Volume 93, Issue 3, Pages 433-446Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ress.2006.12.008
Keywords
reliability based; fatigue; corrosion; deteriorating ships; life extension
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A reliability-based model for assessment of deteriorating ships subjected to multiple environmental conditions is established. Deterioration due to combined crack growth and corrosion in structural components of a ship hull is accounted for based on a fracture mechanics formulation. The model enables to take into account the corrosion-induced increased crack growth rate in two ways: (1) the increased stress range produced by the plate thinning (wastage) effect and (2) corrosion fatigue itself. Sensitivity studies are carried out to evaluate the effect of inspection updating on a production ship subjected to two different climate conditions. The hazard rate concept is adopted as a measure of reliability and emphasized throughout the different case studies. (c) 2007 Elsevier Ltd. All rights reserved.
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