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Author: Memorial University of Newfoundland
Publisher: St. John's : Faculty of Engineering and Applied Science, Memorial University of Newfoundland
ISBN:
Category : Ice mechanics
Languages : en
Pages : 272
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Book Description
Author: Memorial University of Newfoundland
Publisher: St. John's : Faculty of Engineering and Applied Science, Memorial University of Newfoundland
ISBN:
Category : Ice mechanics
Languages : en
Pages : 272
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Book Description
Author: D. S. Sodhi
Publisher:
ISBN:
Category : Ice mechanics
Languages : en
Pages : 145
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Book Description
Author: Michelle Johnston
Publisher:
ISBN:
Category : Ice mechanics
Languages : en
Pages : 418
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Book Description
Author: Mauri Määttänen
Publisher:
ISBN:
Category : Ice
Languages : en
Pages : 60
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Book Description
Author: Stephen J. Jones
Publisher: Springer Science & Business Media
ISBN: 3642841007
Category : Technology & Engineering
Languages : en
Pages : 724
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Book Description
IUTAM-IAHR Symposium on Ice-Structure Interaction Professor Bez Tabarrok, Chairman of the Canadian National Committee (CNC) of the International Union of Theoretical and Applied Mechanics (IUTAM) invited Professor Derek Muggeridge to organize a symposium on ice structure interaction. Dr. Muggeridge readily agreed and prepared a proposal that was endorsed by the CNC and presented to the General Assembly Meeting of IUTAM for their consideration. This Assembly gave its approval and provided the local organizing committee with the names of individuals who were willing to serve on the Scientific Committee. Dr. Muggeridge became chairman of this committee and Dr. Ian Jordaan became co-chairman of this committee as well as chairman of the local organizing committee. The symposium followed the very successful previous meeting, chaired by Professor P. Tryde in Copenhagen, by ten years. Both symposia uti lized Springer-Verlag to publish their proceedings. The Faculty of En gineering and Applied Science at Memorial University of Newfoundland were particul{lXly pleased to host this prestigious symposium as it marked the twentieth anniversary of its Ocean Engineering Research Centre.
Author: Ian Jordaan
Publisher: Cambridge University Press
ISBN: 1108689728
Category : Technology & Engineering
Languages : en
Pages : 246
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Book Description
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.
Author: Kurt Patrick Kennedy
Publisher:
ISBN:
Category : Offshore structures
Languages : en
Pages : 302
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Book Description
Author: International Union of Theoretical and Applied Mechanics
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 760
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Book Description
IUTAM-IAHR Symposium on Ice-Structure Interaction Professor Bez Tabarrok, Chairman of the Canadian National Committee (CNC) of the International Union of Theoretical and Applied Mechanics (IUTAM) invited Professor Derek Muggeridge to organize a symposium on ice structure interaction. Dr. Muggeridge readily agreed and prepared a proposal that was endorsed by the CNC and presented to the General Assembly Meeting of IUTAM for their consideration. This Assembly gave its approval and provided the local organizing committee with the names of individuals who were willing to serve on the Scientific Committee. Dr. Muggeridge became chairman of this committee and Dr. Ian Jordaan became co-chairman of this committee as well as chairman of the local organizing committee. The symposium followed the very successful previous meeting, chaired by Professor P. Tryde in Copenhagen, by ten years. Both symposia uti lized Springer-Verlag to publish their proceedings. The Faculty of En gineering and Applied Science at Memorial University of Newfoundland were particul{lXly pleased to host this prestigious symposium as it marked the twentieth anniversary of its Ocean Engineering Research Centre.
Author: Hyunwook Kim
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The objective of this study is to investigate ice-structure interaction and develop a numerical model to predict the changes of ice loads and pressure during ice-structure interaction on non-planar surfaces. It is important to understand the sequential ice pressure and load development during ice-structure interaction. This is particularly true for non-planar surfaces as most ships and many offshore structures are composed of near-flat panels that may be dented as part of in-service loading leading to panels that are concave. An important question is whether these concave surfaces act as load-increasers for subsequent ice interaction. Most laboratory and field trial tests have been performed based on the assumption that the structural shape is flat. Therefore, little information is available for cases where the structure is concave due to plastic deformation, or specific areas with intentional structural concave shapes. In support of this objective, a series of laboratory-scale ice crushing tests were performed. Force, time and displacement data were measured. It was observed that ice crushing on concave shape indenters induced higher ice loads and pressure magnitudes compared to flat indenters. As part of the experimental program, techniques to use pressure measurement film were adopted to obtain ice-structure contact location, actual contact area, and changes of magnitude of pressure within the contact region. Following the experimental program a numerical model of ice crushing for concave surfaces was developed. In order to achieve valid numerical simulation results, a crushable foam model was modified by adding failure criteria. This followed the effect of indenter shape, level of confinement, test speed and cone angle to be evaluated in the numerical model and compared with the experimental results. The numerical model is shown to be valid for the flat indenter cases and the wedge and conical-shaped indenter cases. The findings from this study show that the shape of the indenting surfaces does influence ice forces and pressure and that generally, concave indentation surfaces lead to increases in pressure and force arising from ice crushing. These effects can be qualified globally and locally using the pressure measurement film, and the effects can be modeled numerically. This work demonstrates that the assumption of ice loads associated with flat or convex shapes may lead to under design for concave shapes or may lead to structural overload in cases where structures previously that have been indented.
Author: Hauke Herrnring
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Ice loads pose a significant risk for ship operation in ice covered waters. At low strain rates, the ice behaves ductile, whereas at high strain rates it reacts in brittle manner. This thesis focuses on the brittle mode, which is the dominating mode for ship-ice interactions. A multitude of experimental data and numerical approaches for the simulation of ice can be found in the literature. Nevertheless, versatile and profound validated simulation techniques are currently missing to access the consequences of an iceberg collision or ice floe impact. Hence, in this thesis the new experimental set-up of the ice extrusion tests for the investigation of ice crushing loads is presented and a finite element model for the simulation of brittle ice-structure interaction problems is developed. During the comprehensive ice extrusion test campaign confined ice specimens were pushed against quasi rigid or full-scale ship structures. The obtained results reveal that the failure mode depends mainly on the test speed, while the confinement of ice mainly determines the load level. The core objective of the developed Mohr-Coulomb Nodal Split (MCNS) ice material model is to enable efficient physical based ice-structure interaction simulations. Unlike previously existing ice models, the MCNS model takes spalling and crushing into account, which significantly increases the versatility and reliability of the approach. The confinement effect on the crushing strength and the anisotropic failure behaviour of the ice is modelled by the Mohr-Coulomb material model. To preserve mass and energy as much as possible, the node splitting technique is applied in addition to the element erosion technique. To validate the findings of the model, the simulated maximum ice forces and contact pressures are compared with small- and large-scale ice extrusion experiments and double pendulum tests. During validation, the MCNS model shows a very good agreement with these experimental results. Finally, a procedure is proposed to simulate full-scale ship-ice collisions on basis of the given methodologies and experimental results.
