## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 11, Part 3American Society of Mechanical Engineers, 1992 - Arctic regions |

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Page 241

FATIGUE LIFE ESTIMATION OF FLEXELEMENTS FOR TLP STRUCTURES A.

Stevenson and J. A. Harris Materials Engineering Research Laboratory Limited

Hertford , United Kingdom EXAMPLE OF

FATIGUE LIFE ESTIMATION OF FLEXELEMENTS FOR TLP STRUCTURES A.

Stevenson and J. A. Harris Materials Engineering Research Laboratory Limited

Hertford , United Kingdom EXAMPLE OF

**CALCULATED**GEOMETRICAL ...Page 242

Axial layer stiffness is

. 02 02 Ec ( 613 + csa ' + 1 G ( 3 + CS ? ) B ( 1 ) Ro 71 PBBBD where s is the

shape factor ( S Loaded Area / Load Free Area ) C is a geometrical factor

between 4 ...

Axial layer stiffness is

**calculated**from the compression modulus in the usual way. 02 02 Ec ( 613 + csa ' + 1 G ( 3 + CS ? ) B ( 1 ) Ro 71 PBBBD where s is the

shape factor ( S Loaded Area / Load Free Area ) C is a geometrical factor

between 4 ...

Page 244

Thus

energy lost by the growth of unit area of crack and is ... From the stiffness the

strains in the rubber layers can be

conditions as ...

Thus

**Calculation**of tearing energy levels Tearing energy is defined as theenergy lost by the growth of unit area of crack and is ... From the stiffness the

strains in the rubber layers can be

**calculated**for particular load and rotationconditions as ...

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### Contents

ADVANCES IN STEEL AND WELDING | 65 |

Kapadia Y Adonyi J D Defilippi and W F Domis | 73 |

ThroughThickness Properties of TMCP Steels | 81 |

Copyright | |

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### Common terms and phrases

analysis applied assessment axial base base metal bending bolt calculated carried chord combined compared complete composite compression concentration considered constant corrosion crack growth curve cycles damage defects depth determined diameter distribution edge effect elastic elements energy Engineering equations estimate experimental failure fatigue crack Figure fracture function geometry hardness heat higher hydrogen increase initial interaction International limit load material mean measured mechanical method mode observed obtained occur Offshore parameters performed pipe plastic plate predictions present pressure probability problems procedure produced properties range ratio reduced reference region Research shown shows solution specimens steel stiffness strain stress intensity factors structures subjected surface Table technique temperature tensile tension thickness thread toughness tubular joints values weld metal yield strength