a numerical model for ice crushing on concave

  • Simulation of Compressive Cone Shaped Ice Specimen

    Results The numerical simulation model developed in this study was verified compared with experimental results performed in the cold room. A 10cm diameter cone-shaped ice

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  • Ice crushing pressure on non-planar surfaceMemorial

    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

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  • Numerical Study of the Interaction between Level Ice and

    In this paper the interaction between level ice and wind turbine tower is simulated by the explicit nonlinear code LS-DYNA. The isotropic elasto-plastic material model is used for the level ice in which ice crushing failure is considered. The effects of ice mesh size and ice failure strain on ice forces are investigated. The results indicate that these parameters have a significant effect on

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  • Simulation of Compressive Cone Shaped Ice Specimen

    Results The numerical simulation model developed in this study was verified compared with experimental results performed in the cold room. A 10cm diameter cone-shaped ice

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  • AD-A280 752 Experimental and Numerical Analysis of

    Experimental and Numerical Analysis of Floating Ice Beam Impact Forces Against A Sloped Structure BARRY A. COUTERMARSH INTRODUCTION a finite element numerical model. These last two steps form the main body of the work and are The force generated by a floating ice floe im- described in detail below. pacting against a structure is of interest in many

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  • Claude DALEY B.E.Sc M.S.E. D. Sc. Memorial

    A Numerical Model for Ice Crushing on Concave Surfaces. Article. Jul 2015 Lower Bound Limit Loads Using the Reference Two-Bar Structure An Improved Estimate Beyond Mura s Lower Bound.

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  • Numerical Modeling of Ice Regime in Rivers

    4.1 2-D Models of Ice Regime in Rivers 4.2. 2-D Model of Ice Jam 4.3 2-D model of the Pollutant Propagation under Ice Jam Condition 5. Numerical modeling the turbulent structure of flows under ice 6. Conclusions Glossary Bibliography Biographical Sketch Summary Numerical river ice models have become valuable tools for investigating many aspects

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  • Numerical Simulation of Ice Ridge Breakinguliege

    The objective of this master thesis was to develop and implement algorithms in a numerical tool capable of simulating the process of ship hull breaking through pressure ice ridge. The tool is based on the idea to implement Discrete Element Method (DEM) and corresponding code developed at Hamburg Ship Model Basin (HSVA) for simulation of ice

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  • A numerical model for ice crushing on concave surfaces

    This indicates that the model is relatively robust for ice crushing cases and meets the primary goal of this study. 6. Conclusions. A numerical simulation model for ice crushing scenarios has been developed based on results from small scale (10 cm diameter ice specimen) compressive ice crushing

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  • CORE

    The kinematics of this process is an essential determinant of the energy that is available to drive the ice crushing process during the collision. The present research aims to develop a model to represent the mechanics of such collisions and set a direction for future work. The results of the experiments are used to validate the numerical

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  • Claude DALEY B.E.Sc M.S.E. D. Sc. Memorial

    A Numerical Model for Ice Crushing on Concave Surfaces. Article. Jul 2015 Lower Bound Limit Loads Using the Reference Two-Bar Structure An Improved Estimate Beyond Mura s Lower Bound.

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  • Numerical modeling of ice behavior under high velocity

    Abstract In this work a constitutive relation for ice at high strain rates and an algorithm for its numerical integration are developed. This model is based on the Drucker–Prager plasticity criteria which allows a different behavior in tension and in compression. In addition a failure criteria based on pressure cut-offs is implemented to describe the ice damage.

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  • Amazon Costzon Electric Ice Shaver 250W Stainless

    Non-slip Concave-convex Handle Ice Crusher w/Safe On/Off Switch for Family School Church Restaurants Bars. ZENY Ice Shaver Machine Electric Snow Cone Maker Stainless Steel Shaved Ice Machine 145lbs Per Hour Item model number Electric Ice Shaver Customer Reviews 4.5 out of 5 stars 151 ratings.

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  • CiteSeerX — ICE NONSIMULTANEOUS FAILURE BENDING AND FLOE

    The ice-loading module includes different ice mechanics models that address various ice properties fail-ure modes and ice-structure interaction mechanisms. In a previ-ous OMAE symposium paper models for quasi-static crushing transient dynamic ice breakage and random forcing for the ice

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  • Mitigation of ice loading on off-shore wind turbines

    A complex ice material mechanical model capable of simulating bending and crushing failure modes is currently under development. Lack of such material model forbids a full ice-cone-tower dynamic simulation where ice loading is modeled by periodically changing contact forces between ice

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  • NTNU Open Numerical Investigation of Ship s Continuous

    The numerical procedure was calibrated and validated using full- andmodel-scale measurements. The validated numerical model was in turn used toinvestigate and clarify issues that have not been previously considered.An icebreaker typically breaks ice by its power its weight and a strengthened bowwith low stem angle.

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  • AN OPTIMIZATION APPROACH TO MODELING SEA ICE

    the corresponding numerical model with variable ice thickness but still infinite ice strength is compared to the Lagrangian one of Part 1 in sections 3 and 4. In section 5 then ice strength is limited and ice is allowed to yield. For the parameterization of ice strength we rely on suggestions from the literature. (Note that as we are

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  • A Spectral Model for Forces Due to Ice Crushing Journal

    This paper presents a model of dynamic ice forces on vertical offshore structures. The model concerns a loading scenario where a competent ice sheet is drifting and crushing against the structure. Full scale data obtained on two offshore structures were used in the derivation of a method that applies both to narrow and wide structures.

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  • Investigating processes of glacial erosion and cirque

    Poster Presentation or Paper. Deposit scholarly works such as posters presentations conference papers or white papers. If you would like to deposit a peer-reviewed article or book chapter use the "Scholarly Articles and Book Chapters" deposit option.

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  • A Spectral Model for Forces Due to Ice Crushing Journal

    This paper presents a model of dynamic ice forces on vertical offshore structures. The model concerns a loading scenario where a competent ice sheet is drifting and crushing against the structure. Full scale data obtained on two offshore structures were used in the derivation of a method that applies both to narrow and wide structures.

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  • Numerical simulation of ice impacts on ship hulls in

    The preparation of the model ice sheet begins with a wet-seeding procedure after cooling. The model ice is grown at −18 ± 0.5 °C and the growth rate is approximately 2.1 mm/h during freezing. In particular micro-bubbles will be discharged uniformly from the bottom of the ice model basin to control the density of model ice.

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  • Local Ice Crushing Resistance of OPEN CELL SHEET PILE®

    To accurately model this soil-sheet pile system the finite element method provides an ideal numerical tool. The primary mechanism by which large external loading can be applied to the sheet pile wall is through multiyear ice impacts in winter months. Level ice

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  • Working Mechanism and Numerical Simulation of a Novel 6

    Finally the liner wear of the concave is deduced by a numerical example which can provide a theoretical foundation for the development of the intelligent crusher. Based on the inter-particle breakage theory and characteristics of oscillating motion a novel 6-DOF robotic crusher is proposed which combines the chamber structure of the cone

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  • Numerical Modeling of Ice Regime in Rivers

    4.1 2-D Models of Ice Regime in Rivers 4.2. 2-D Model of Ice Jam 4.3 2-D model of the Pollutant Propagation under Ice Jam Condition 5. Numerical modeling the turbulent structure of flows under ice 6. Conclusions Glossary Bibliography Biographical Sketch Summary Numerical river ice models have become valuable tools for investigating many aspects

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  • Dynamic Crushing of Hexagonal Honeycombs under In-Plane

    The in-plane dynamic crushing of hexagonal honeycombs was numerically studied by means of explicit dynamic finite element method using ANSYS/LS-DYNA. Under the assumption that the edge length and thickness were the same the metal honeycomb models filled with convex and concave cells were established. And then the effects of expanding angle and impact velocity on the plateau stress

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  • Spring Cone Crusher Machines Manufacturers Cone Crusher

    Cone Crusher . Introduction Cone Crushers is widely used in mines cement plants and sandstone industries for medium crushing of various mine rocks such as iron ore copper ore non-ferrous metal ore granite sandstone etc. Working principle is as follows The cone body swings under the force of the eccentric shaft sleeve so that the concave is sometimes close to and sometimes away from

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  • EXPERIMENTAL AND MODELLING STUDY OF HAIL IMPACT

    NUMERICAL MODEL The numerical modelling part was divided into calibrating the ice material model and modelling the threshold velocity for initiation of damage (delamination). All calculations were carried out using LS-Dyna. The calibration of the ice material model was

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  • Local ice crushing analyses of OPEN CELL SHEET PILE Wall

    Oct 19 2011 · PLAXIS 3DFoundation was utilized in a recent analysis of ice loading to a vertical sheet pile wall. The analyzed retaining system consisted of an OPEN CELL SHEET PILE wall which utilizes hoop tension in the steel to retain the soil behind similar to a circular fl at sheet pile cell.

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  • Analysis of O shore Structures Based on Response Spectrum

    Gagnon 33 established a numerical model for ice crushing failure. Sopper 34 performed a series of ice crushing tests to investigate the e ects of external boundary conditions and geometric contact shapes under ice force. In fact ice force and the seismic e

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  • Numerical Simulation of Ice Ridge Breakinguliege

    The objective of this master thesis was to develop and implement algorithms in a numerical tool capable of simulating the process of ship hull breaking through pressure ice ridge. The tool is based on the idea to implement Discrete Element Method (DEM) and corresponding code developed at Hamburg Ship Model Basin (HSVA) for simulation of ice

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  • A Simulation of Non-Simultaneous Ice Crushing Force for

    When the offshore wind energy industry attempts to develop in cold regions ice load becomes the main technological challenge for offshore wind turbine foundation design. Dynamic ice loads acting on wind turbine foundations should be calculated in a reasonable way. The scope of this study is to present a numerical model that considers the non-simultaneous ice crushing failure acting on the

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  • A numerical model of ice crushing using a foam analogue

    A key point is that the model is showing the shape of the ice once some crushing has already occurred i.e. it shows the ice process surface. Studies ( Gagnon 1998 Daley 1992 ) show that the angle for spalling that occurs in the ice is for the most part less than the original face angles of the ice mass.

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  • Numerical rendition of ice crushingCORE

    Numerical rendition of ice crushing . By R. E. Gagnon. Abstract. A numerical model for ice crushing has been constructed that takes into account the physical processes identified in many experimental studies. These include the presence and evolution of high-pressure and low-pressure zones the rapid removal of ice through melting and the

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  • NTNU Open Numerical Predictions of Global and Local Ice

    Information on the distributions of local ice loads around the hull can be used for more effective design of ice-going ships both in terms of overall operation and from the structural point of view. The present thesis focuses on a numerical model for simulating ice–hull interaction and ship maneuvers in level ice.

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  • A Spectral Model for Forces Due to Ice Crushing Journal

    This paper presents a model of dynamic ice forces on vertical offshore structures. The model concerns a loading scenario where a competent ice sheet is drifting and crushing against the structure. Full scale data obtained on two offshore structures were used in the derivation of a method that applies both to narrow and wide structures.

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  • Cone Crusher ModellingMetallurgist Mineral Processing

    Cone Crusher Modelling Magnus Evertsson Applied Mechanics Chalmers University of Technology Crusher Model Rock Material Crusher Crusher Dynamics Design Performance Pressure Wear Size Reduction. 14 Quarry Academy 2005 Concave Mantle ( ) sin tan i cos p d p d α αα

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