## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volumes 1-2American Society of Mechanical Engineers, 1991 - Arctic regions |

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Page 136

FATIGUE AND FRACTURE MECHANICS ANALYSES Fatigue Initiation Analysis

Initiation analysis was developed for analysing the initiation of fatigue cracks at

notches with local plastic deformation (due to

FATIGUE AND FRACTURE MECHANICS ANALYSES Fatigue Initiation Analysis

Initiation analysis was developed for analysing the initiation of fatigue cracks at

notches with local plastic deformation (due to

**stress**concentration).Page 136

Mg RMS Mean of g Long term

Local

Nominal

Mg RMS Mean of g Long term

**stress**time history root mean square ( RMS ) valueLocal

**stress**Materials constant in Manson - Coffin equation Mean local**stress**Nominal

**stress**Yield**stress**Standard deviation of g Residual**stress**on surface ...Page 138

Nominal Loading A flexible format to present the

was proposed by Pook 1983 using the two parameter Weibull distribution . This

choice resulted from a detailed study of the results from several large scale in ...

Nominal Loading A flexible format to present the

**stress**exceedance diagramswas proposed by Pook 1983 using the two parameter Weibull distribution . This

choice resulted from a detailed study of the results from several large scale in ...

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### Contents

SPECIAL SESSION HYDRODYNAMICS | 1 |

HYDRODYNAMIC FORCES | 29 |

SECONDORDER EFFECTS | 113 |

Copyright | |

47 other sections not shown

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### Common terms and phrases

acting amplitude analysis angle applied approach approximately assumed average body boundary cable calculated circular cylinder coefficients compared comparison components computed considered constant corresponding cylinder damping depth described determined diffraction direction distribution domain drag drift force effect element Engineering equation estimates experimental experiments expressed field Figure floating flow fluid follows free surface frequency function given height horizontal hydrodynamic incident included increase integral irregular waves length lift force linear loads mass maximum mean measured method mode mooring motion natural nonlinear obtained Ocean Offshore oscillation period phase platform points position potential predicted present pressure problem random range regular relative represents respectively response second order second-order separation ship shown shows simulation solution spectrum structure surge Table tests theory values velocity vertical vortex wave forces