The Effect Of Grain Size On The Internal Fracturing Of Polycrystalline Ice
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Effect Of Grain Size On The Internal Fracturing Of Polycrystalline Ice
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Author : David M. Cole
language : en
Publisher:
Release Date : 1986
Effect Of Grain Size On The Internal Fracturing Of Polycrystalline Ice written by David M. Cole and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Acoustic emission categories.
This work presents the results of a study to examine the effects of grain size of internal microfractures in polycrystalline ice. Laboratory-prepared specimens were tested under uniaxial, constant-load creep conditions at -5 C. Grain size ranged from 1.5 to 6.0 mm. This range of grain size, under an initial creep stress of 2.0 MPa, led to a significant change in the character of deformation. The finest-grained material displayed no internal cracking and typically experienced strains of 10 to the minus 2nd power at the minimum creep rate epsilon. The coarse-grained material experienced severe cracking and a drop in the strain at epsilon min to approximately 4x10 to the minus 3rd power. Extensive post-test optical analysis allowed estimation of the size distribution and number of microcracks in the tested material. These data led to the development of a relationship between the average crack size and the average grain size. Additionally, the crack size distribution, when normalized to the grain diameter, was very similar for all specimens tested. The results indicate that the average crack size is approximately one-half the average grain diameter over the stated grain size range. A dislocation pileup model is found to adequately predict the onset of internal cracking. The work employed acoustic emission techniques to monitor the fracturing rate occurred. Other topics covered in this report include creep behavior, crack healing, the effect of stress level on fracture size and the orientation of cracked grains. Theoretical aspects of the grain size effect on material behavior are also given.
The Effect Of Grain Size On The Internal Fracturing Of Polycrystalline Ice
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Author : D. M. Cole
language : en
Publisher:
Release Date : 1984
The Effect Of Grain Size On The Internal Fracturing Of Polycrystalline Ice written by D. M. Cole and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.
Iutam Symposium On Scaling Laws In Ice Mechanics And Ice Dynamics
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Author : J.P. Dempsey
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-18
Iutam Symposium On Scaling Laws In Ice Mechanics And Ice Dynamics written by J.P. Dempsey and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-18 with Science categories.
This Volume constitutes the Proceedings of the IUTAM Symposium on 'Scaling Laws in Ice Mechanics and Ice Dynamics', held in Fairbanks, Alaska from 13th to 16th of June 2000. Ice mechanics deals with essentially intact ice: in this discipline, descriptions of the motion and deformation of Arctic/ Antarctic and river/lake ice call for the development of physically based constitutive and fracture models over an enormous range in scale: 0.01 m - 10 km. Ice dynamics, on the other hand, deals with the movement of broken ice: descriptions of an aggregate of ice floes call for accurate modeling of momentum transfer through the sea/ice system, again over an enormous range in scale: 1 km (floe scale) - 500 km (basin scale). For ice mechanics, the emphasis on lab-scale (0.01 - 0.5 m) research con trasts with applications at the scale of order 1 km (ice-structure interaction, icebreaking); many important upscaling questions remain to be explored.
Crrel Report
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Author :
language : en
Publisher:
Release Date : 1986
Crrel Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Cold regions categories.
Journal Of Energy Resources Technology
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Author :
language : en
Publisher:
Release Date : 1985
Journal Of Energy Resources Technology written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Electronic journals categories.
Proceedings Of The Fourth International Offshore Mechanics And Arctic Engineering Symposium
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Author : Jin S. Chung
language : en
Publisher:
Release Date : 1985
Proceedings Of The Fourth International Offshore Mechanics And Arctic Engineering Symposium written by Jin S. Chung and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Arctic regions categories.
170 papers from 20 countries under the headings: Deepwater structures; Advances in offshore structure construction techniques and operations; Wave-structure-soil interactions; Fatigue and structural mechanics; Offshore loading and control; Riser mechanics and mooring systems; Submarine pipelines; Ocean energy.
Proceedings Of The International Offshore Mechanics And Arctic Engineering Symposium
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Author :
language : en
Publisher:
Release Date : 1986
Proceedings Of The International Offshore Mechanics And Arctic Engineering Symposium written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Arctic regions categories.
Proceedings Of The International Conference On Offshore Mechanics And Arctic Engineering
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Author :
language : en
Publisher:
Release Date : 1995
Proceedings Of The International Conference On Offshore Mechanics And Arctic Engineering written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Arctic regions categories.
Viith Symposium On The Physics And Chemistry Of Ice
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Author :
language : en
Publisher:
Release Date : 1987
Viith Symposium On The Physics And Chemistry Of Ice written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Ice categories.
Crrel Technical Publications
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Author : Cold Regions Research and Engineering Laboratory (U.S.)
language : en
Publisher:
Release Date : 1990
Crrel Technical Publications written by Cold Regions Research and Engineering Laboratory (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Arctic regions categories.