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Publications
Garbatov, Y. (2014), “Fatigue Strength Asessment of Ship Structures”, XIV Portuguese Conference on Fracture (PCF 2014), 6-7 September, Régua, Portugal, pp. 3-18
Fatigue strength assessment of complex double hull oil tanker structures based on different local structural finite element approaches is performed here. Wave-induced vertical and horizontal bending moments and pressure are considered in the analysis. Stress analyses are performed based on the local hot spot and notch stress approaches. A linear elastic finite element analysis is used to determine the stress distribution around the welded details and to estimate structural stresses of all critical locations. Fatigue damage is estimated by employing the Palmgren-Miner approach. The time-dependent hotspot stresses affected by corrosion deterioration are defined by making use of a nonlinear regression analysis. The statistical properties of fatigue damage and service life of hotspots are estimated taking into account random non-uniform time-dependent corrosion wastage. Fatigue reliability, during the service life, is modelled as a series system of correlated components.
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