Risk assessment of aging ship hull structures in the presence of corrosion and fatigue

Risk assessment of aging ship hull structures in the presence of corrosion and fatigue

An approach for risk assessment of the ultimate strength of an aging ship hull structure that is being degraded by corrosion and fatigue is developed. Time-dependent random function models for corrosion growth, fatigue cracks and corrosion-enhanced fatigue cracks that weaken the capacity of a ship h...

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Veröffentlicht in:Marine structures 2002-05, Vol.15 (3), p.211-231
Hauptverfasser: Akpan, Unyime O, Koko, T.S, Ayyub, B, Dunbar, T.E
Format: Artikel
Sprache:eng
Schlagworte:
Aging
Applied sciences
Corrosion
Degradation
Exact sciences and technology
Fatigue
Ground, air and sea transportation, marine construction
Hull-structure
Marine
Marine construction
Risk
Time-dependent reliability
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creator Akpan, Unyime O
Koko, T.S
Ayyub, B
Dunbar, T.E
description An approach for risk assessment of the ultimate strength of an aging ship hull structure that is being degraded by corrosion and fatigue is developed. Time-dependent random function models for corrosion growth, fatigue cracks and corrosion-enhanced fatigue cracks that weaken the capacity of a ship hull are presented. The second-order reliability method is used to calculate instantaneous reliability of the primary hull structure. Methodology for computing the time-dependent reliability of a degrading aging ship structure is developed. Sensitivity of aging structure reliability to statistical and probabilistic description of corrosion and fatigue crack parameters is investigated. An example of a problem involving an aging tanker structure is used for demonstration.
doi_str_mv 10.1016/S0951-8339(01)00030-2
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source ScienceDirect Journals (5 years ago - present)
subjects Aging
Applied sciences
Corrosion
Degradation
Exact sciences and technology
Fatigue
Ground, air and sea transportation, marine construction
Hull-structure
Marine
Marine construction
Risk
Time-dependent reliability
title Risk assessment of aging ship hull structures in the presence of corrosion and fatigue
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