Fracture mechanics approach to assess the progressive structural failure of a damaged ship

Bardetsky, Alexander

doi:10.1201/b14915-10

Cited by 2 publications

(2 citation statements)

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“…The crack propagation in a damaged ship caused by fluctuating stresses during rescue is studied at the conceptual level only [7][8][9]. In these studies, rather simple computational models were used that did not allow reaching a firm conclusion regarding the importance of fatigue crack propagation.…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Ship Emergency Response Procedure in Case of Collision Accident Considering Crack Propagation during Salvage Period

Gledić

Mikulić

Parunov

2021

JMSE

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Specialized procedures to help in the emergency response situations following ship accidents have been under development by the Classification Societies. Such procedures consider the hull-girder collapse as the most important failure mode, without the possibility of crack propagation caused by fluctuating wave loads. In the present study, the fatigue crack propagation in the main deck of the oil tanker damaged in collision during salvage is investigated. The shape and size of the damage are modelled using the realistic bow shape of the striking ship and historical data of ship accidents. The stress intensity factor (SIF) across the main deck of the struck ship is calculated numerically and by the method based on the available experimental results of the crack propagation in the stiffened panel. Fluctuating wave–induced stresses in short-term sea conditions during salvage are obtained by Monte Carlo simulation (MC) based on Rayleigh distribution. Cycle-by-cycle crack propagation is calculated using Paris law. Many salvage simulations are performed to cover different possible time-histories of the fatigue loading. Results of the analysis are presented as histogram of the crack increase during salvage. Parametric analysis is performed to investigate the influence of the sea state severity, initial crack size, and towing duration on the final crack size. The proposed procedure can be considered as a part of a software tool for emergency response action during salvage of damaged ship.

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Section: Introductionmentioning

confidence: 99%

Improvement of the Ship Emergency Response Procedure in Case of Collision Accident Considering Crack Propagation during Salvage Period

Gledić

Mikulić

Parunov

2021

JMSE

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“…During the towing period of the ship from the place of accident to repair facility damage can progress very fast as fatigue crack and cause hazard. For calculation of ship structural strength is very important to make a rapid assessment of Stress Intensity Factor (SIF) (Bardetsky 2013).…”

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confidence: 99%

Application of weight function method in the assessment of crack propagation through stiffened panel

Gledić¹,

Parunov²

2015

Towards Green Marine Technology and Transport

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The purpose of this paper is to examine the weight function method as rapid stress intensity calculation method for damaged stiffened panel. Typical application is the crack propagation assessment when the ship is damaged due to collision or grounding. If the stress distribution is known, as well as the weight function for specific crack geometry it is possible to calculate the stress intensity factor for any non-linear stress distribution. The method is firstly verified on the examples when analytical solutions are available. A new method to account for the effect of stiffener along the crack path using the weight function method is then proposed. The applicability of the weight function method for crack propagation through the damaged stiffened panel is also investigated.

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Fracture mechanics approach to assess the progressive structural failure of a damaged ship

Cited by 2 publications

References 2 publications

Improvement of the Ship Emergency Response Procedure in Case of Collision Accident Considering Crack Propagation during Salvage Period

Improvement of the Ship Emergency Response Procedure in Case of Collision Accident Considering Crack Propagation during Salvage Period

Application of weight function method in the assessment of crack propagation through stiffened panel

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