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تعداد نتایج: 354

Creep and Fracture of Ice

$The first complete account of the physics of the creep and fracture of ice, for graduates, engineers and scientists.$

By Erland M. Schulson, Paul Duval
Publisher: Cambridge University Press, 2009-04-30
Pages: 403
Language: en
ISBN_13:9780521806206
ISBN_10:0521806208
Subject: Science

Creep and Fracture of Ice

$The first complete account of the physics of the creep and fracture of ice for graduates, engineers and scientists.$

جزئیات و درخواست

By E. M. Schulson, Erland M Schulson, Duval,, Paul Duval
2014-05-14
Pages: 417
Language: en
ISBN_10:0511540752
ISBN_13:9780511540752
Subject: Ice

$This monograph summarizes knowledge of the mechanics of ice. It is concerned principally with the effect of stress on the mechanical properties of ice, including elasticity, anelasticity, sound propagation, plastic deformation and creep in single crystals and in polycrystalline ice, fracture, and recrystallization and grain growth that accompanies plastic deformation. The monograph also includes a comprehensive bibliography.$

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جزئیات و درخواست

By John W. Glen
1975
Pages: 56
Language: en
OTHER:UCR:31210025020197
Subject: Ice

Effect of Grain Size on the Internal Fracturing of Polycrystalline Ice

$This work presents the results of a study to examine the effects of grain size of internal microfractures in polycrystalline ice. Laboratory-prepared specimens were tested under uniaxial, constant-load creep conditions at -5 C. Grain size ranged from 1.5 to 6.0 mm. This range of grain size, under an initial creep stress of 2.0 MPa, led to a significant change in the character of deformation. The finest-grained material displayed no internal cracking and typically experienced strains of 10 to the minus 2nd power at the minimum creep rate epsilon. The coarse-grained material experienced severe cracking and a drop in the strain at epsilon min to approximately 4x10 to the minus 3rd power. Extensive post-test optical analysis allowed estimation of the size distribution and number of microcracks in the tested material. These data led to the development of a relationship between the average crack size and the average grain size. Additionally, the crack size distribution, when normalized to the grain diameter, was very similar for all specimens tested. The results indicate that the average crack size is approximately one-half the average grain diameter over the stated grain size range. A dislocation pileup model is found to adequately predict the onset of internal cracking. The work employed acoustic emission techniques to monitor the fracturing rate occurred. Other topics covered in this report include creep behavior, crack healing, the effect of stress level on fracture size and the orientation of cracked grains. Theoretical aspects of the grain size effect on material behavior are also given.$

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جزئیات و درخواست

By David M. Cole, Cold Regions Research and Engineering Laboratory (U.S.)
1986
Pages: 92
Language: en
OTHER:UOM:39015091135056
Subject: Acoustic emission

Mechanics of Creep Brittle Materials 1

$Failure of components which operate in the creep range can result either from the growth of a dominant crack or through the accumulation of 'damage' in the material. Conventional and nuclear power generating plant are generally designed on the basis of continuum failure, with assessment routes providing an indication of the effects of flaws on component performance. Another example where an understanding of creep failure is important is in the design of offshore structures which operate in arctic waters. These structures can be subjected to quite considerable forces by wind-driven ice sheets, which are limited by failure of the ice sheet. Design codes are currently being developed which identify the different mechanisms of failure, ranging from continuum crushing to radial cracking and buckling of the ice sheet. Our final example concerns engineering ceramics, which are currently being considered for use in a wide range of high-temperature applications. A major problem preventing an early adoption of these materials is their brittle response at high stresses, although they can behave in a ductile manner at lower stresses. In each of the above situations an understanding of the processes of fast fracture, creep crack growth and continuum failure is required, and in particular an understanding of the material and structural features that influence the transition from brittle to ductile behaviour. The translation of this information to component design is most advanced for metallic components.$

جزئیات و درخواست

By A.C.F. Cocks, A.R.S. Pontern
Publisher: Springer Science & Business Media, 2012-12-06
Pages: 318
Language: en
ISBN_13:9789400911178
ISBN_10:9400911173
Subject: Technology & Engineering

Mechanics of Thermal Contraction Cracks and Ice-Wedge Polygons in Permafrost

جزئیات و درخواست

By Arthur H. Lachenbruch
Publisher: Geological Society of America, 1962
Pages: 81
Language: en
ISBN_13:9780813720708
ISBN_10:0813720702
Subject: Frozen ground

Static Creep Micro-Macro Fracture Mechanics of Brittle Solids

$This book gathers a large amount of recent research results on this topic to better understand the static creep micro–macro fracture mechanics in brittle solids (e.g., glass, ceramic, concrete, ice, and rock). To be precise, this is about to explore the effects of the external factors of stress paths, water content, seepage pressure, dynamic disturbance, thermal treated temperature, and the internal factors of crack angle, size, recovery, and nucleation coalescence on the static creep fracture mechanical properties in brittle solids. This book provides important theoretical support in evaluation for long-term lifetime in the brittle solid engineering (e.g., deep underground engineering, architecture engineering, aerospace engineering, and mechanical manufacturing engineering).$

جزئیات و درخواست

By Xiaozhao Li, Zhushan Shao, Chengzhi Qi
Publisher: Springer Nature, 2024-01-13
Pages: 239
Language: en
ISBN_13:9789819982035
ISBN_10:9819982030
Subject: Science

Processes of Deformation and Fracture of Ice in Compression

جزئیات و درخواست

By Ian J. Jordaan, Richard Frank McKenna
1989*
Pages: 48
Language: en
OTHER:OCLC:456592821
Subject: Ice mechanics

CRREL Report

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جزئیات و درخواست

1986
Pages: 600
Language: en
OTHER:MINN:31951P00903014Q
Subject: Cold regions

Fracture of Lake and Sea Ice

$The increased activity in cold regions has made a thorough understanding of fracture in lake and sea ice quite desirable, inasmuch as this information has application to a number of problems of geophysical as well as engineering importance. This survey starts with a discussion of the structure of ice I and the macro- and microstructure of sea and lake ice as well as their chemistry and phase relations. Recent work on the direct observation of dislocations as well as the formation of cracks in ice is summarized. Formal ice-brine-air models for analyzing variations in ice strength are also reviewed. The results of the different types of tests are discussed and compared (compressive, indentation, direct and ring-tension, small beam flexure and in situ cantilevers and simple beams, shear, and impact). Scale effects are considered as well as the rapid strength deterioration experienced by ice sheets in the spring. Finally, a number of recommendations are made concerning future research in this field. (Author).$

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جزئیات و درخواست

By Wilford Frank Weeks, A. Assur
1969
Pages: 92
Language: en
OTHER:UCSD:31822020697793
Subject: Fracture mechanics

Physics and Mechanics of Ice

Symposium Copenhagen, August 6-10, 1979, Technical Universit...

جزئیات و درخواست

By P. Tryde
Publisher: Springer Science & Business Media, 2012-12-06
Pages: 392
Language: en
ISBN_13:9783642814341
ISBN_10:3642814344
Subject: Science

Drift, Deformation, and Fracture of Sea Ice

A Perspective Across Scales

$Sea ice is a major component of polar environments, especially in the Arctic where it covers the entire Arctic Ocean throughout most of the year. However, in the context of climate change, the Arctic sea ice cover has been declining significantly over the last decades, either in terms of its concentration or thickness. The sea ice cover evolution and climate change are strongly coupled through the albedo positive feedback, thus possibly explaining the Arctic amplification of climate warming. In addition to thermodynamics, sea ice kinematics (drift, deformation) appears as an essential factor in the evolution of the ice cover through a reduction of the average ice age (and consequently of the cover's thickness), or ice export out of the Arctic. This is a first motivation for a better understanding of the kinematical and mechanical processes of sea ice. A more upstream, theoretical motivation is a better understanding of the brittle deformation of geophysical objects across a wide range of scales. Indeed, owing to its very strong kinematics, compared e.g. to the Earth’s crust, an unrivaled kinematical data set is available for sea ice from in situ (e.g. drifting buoys) or satellite observations. Here, we review the recent advances in the understanding of sea ice drift, deformation and fracturing obtained from these data. We focus particularly on the scaling properties in time and scale that characterize these processes, and we emphasize the analogies that can be drawn from the deformation of the Earth’s crust. These scaling properties, which are the signature of long-range elastic interactions within the cover, constrain future developments in the modeling of sea ice mechanics. We also show that kinematical and rheological variables such as average velocity, average strain-rate or strength have significantly changed over the last decades, accompanying and actually accelerating the Arctic sea ice decline.$

جزئیات و درخواست

By Jerome Weiss
Publisher: Springer Science & Business Media, 2013-03-14
Pages: 83
Language: en
ISBN_13:9789400762022
ISBN_10:940076202X
Subject: Science

By T. Sanderson
Publisher: Springer, 1988-05-31
Pages: 284
Language: en
OTHER:UOM:39015013826089
Subject: Science

Plastic Deformation of Minerals and Rocks

$Volume 51 of Reviews in Mineralogy and Geochemistry highlights some of the frontiers in the study of plastic deformation of minerals and rocks. This book reviews large-strain shear deformation and deformation experiments under ultrahigh pressures; the issues of deformation of crustal rocks and the upper mantle; the interplay of partial melting and deformation; the new results of ultrahigh pressure deformation of deep mantle minerals; the stability of deformation under deep mantle conditions with special reference to phase transformations and their relationship to the origin of intermediate depth and deep-focus earthquakes; a detailed description of fracture mechanisms of ice; of experimental and theoretical studies on seismic wave attenuation; the relationship between crystal preferred orientation and macroscopic anisotropy; recent progress in poly-crystal plasticity to model the development of anisotropic fabrics both at the microscopic and macroscopic scale; a thorough review of seismic anisotropy of the upper mantle covering the vast regions of geodynamic interests and the theoretical aspects of shear localization. All chapters contain extensive reference lists to guide readers to the more specialized literature. This volume was written for a workshop, in December 2002 in Emeryville, California.$

جزئیات و درخواست

By Shun-ichiro Karato, Hans-Rudolph Wenk
Publisher: Walter de Gruyter GmbH & Co KG, 2018-12-17
Pages: 432
Language: en
ISBN_13:9781501509285
ISBN_10:1501509284
Subject: Science

Arctic Offshore Engineering

جزئیات و درخواست

By Andrew Clennel Palmer, Ken Croasdale
Publisher: World Scientific, 2013
Pages: 372
Language: en
ISBN_13:9789814368773
ISBN_10:9814368776
Subject: History

The Creation of Glaciers

جزئیات و درخواست

By Carol Hand
Publisher: The Rosen Publishing Group, Inc, 2009-08-15
Pages: 66
Language: en
ISBN_13:9781435852983
ISBN_10:1435852982
Subject: Juvenile Nonfiction

Special Report

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جزئیات و درخواست

1991
Pages: 24
Language: en
OTHER:MINN:31951D01854328F
Subject: Arctic regions

Mechanics of Ice Failure

An Engineering Analysis

$Featuring real-world examples and practical methodology, this rigorous text explores time dependence in the mechanics of ice. Emphasizing use of full scale data, and implementing risk-based design methods, mechanical theory is combined with design and modelling. Readers will gain understanding of fundamental concepts and modern advances of ice mechanics and ice failure processes, analysis of field data, and use of probabilistic design methods, with applications to the interaction of ships and offshore structures with thick ice features or icebergs. The book highlights the use of viscoelastic theory, including nonlinearity with stress and the effects of microstructural change, in the mechanics of ice failure and fracture. The methods of design focus on risk analysis, with emphasis on rational limit-state principles and safety. Full discussion of historical discoveries and modern advances – including Hans Island, Molikpak, and others – support up-to-date methods and models to make this an ideal resource for designers and researchers.$

جزئیات و درخواست

By Ian Jordaan
Publisher: Cambridge University Press, 2023-02-28
Pages: 246
Language: en
ISBN_13:9781108689724
ISBN_10:1108689728
Subject: Technology & Engineering

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