## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 4; Volume 8, Part 4American Society of Mechanical Engineers, 1989 - Arctic regions |

### From inside the book

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Page 13

CRACK

STRESS STATES P. Kalifa , P. Duval ... The stress required to

compression Triaxial compression tests have been carried out on should then be

...

CRACK

**NUCLEATION**IN POLYCRYSTALLINE ICE UNDER COMPRESSIVESTRESS STATES P. Kalifa , P. Duval ... The stress required to

**nucleate**crack incompression Triaxial compression tests have been carried out on should then be

...

Page 14

He used the Griffith criterion ( Griffith , 1921 ) based on the energy balance :

criterion and eq . ( 1 ) , he deduced the expression of the critical shear stress on

the ...

He used the Griffith criterion ( Griffith , 1921 ) based on the energy balance :

**nucleation**is possible if it is accompanied by a decrease of energy . Using thiscriterion and eq . ( 1 ) , he deduced the expression of the critical shear stress on

the ...

Page 62

... randomly oriented an averaging approach can be applied which allows

assumption of the isotropy of the base material . As mentioned above a

microcrack ( microcracks ) wi

the

... randomly oriented an averaging approach can be applied which allows

assumption of the isotropy of the base material . As mentioned above a

microcrack ( microcracks ) wi

**nucleate**if the potential energy decreases duringthe

**nucleation**.### What people are saying - Write a review

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### Contents

OFFSHORE MECHANICS | 1 |

ICE FORCES | 11 |

MATERIALS TECHNOLOGY | 24 |

Copyright | |

22 other sections not shown

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### Common terms and phrases

analysis applied approach Arctic assumed average behaviour body calculated coefficient components compression compressive stress computed considered constant crack creep damage deformation dependent depth described determined developed diameter direction distribution effect elastic energy Engineering equation estimate experiments expression factor failure field Figure floe force fracture frequency function given grain grain boundary horizontal ice sheet iceberg impact increase initial International length limit load mass material maximum mean measured Mechanics method microcracks motion normal nucleation observed obtained Offshore operation parameters peak performed plane position predicted present pressure probability range ratio Regions relation relative Research resistance ridge samples sea ice shear ship shown shows simulation specimen strain rate strength stress structure surface Table temperature tensile tensor tests thickness toughness uniaxial vertical wave