a numerical model of ice crushing using a foam
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 highpressure and lowpressure zones the rapid removal of ice through melting and the transformation of relatively intact ice highpressure zone material to
Sep 15 2015 · A numerical model for ice crushing on concave surfaces Thus defining a proper stress–volumetric strain relationship is the most significant aspect of using a crushable foam model as an ice material model Gao et al 2014 Wang et al 2008 Proposed numerical ice crushing model
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The numerical ice model material properties and modeling concept of the ice model is based on a ‘crushable foam’ material model This concept and which was calibrated by Refs using numerical simulations based on by CCGS Terry Fox field trials test The behavior of the crushable foam material model is governed by a userdefined
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A crushable foam model was used for the ice that made contact with the vessel during the simulations The isotropic foam model crushes onedimensionally with a Poissons ratio that is essentially zero as described by Hallquist 1998 Unloading is elastic to the tension cutoff stress Subsequent reloading follows the unloading curve
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A crushable foam model was used for the ice that made contact with the vessel during the simulations The isotropic foam model crushes onedimensionally with a Poissons ratio that is essentially zero as described by Hallquist 1998 Unloading is elastic to the tension cutoff stress Subsequent reloading follows the unloading curve
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The shipiceberg collision scenario is simulated with finite element method in this paper The focus of the simulation is the iceberg geometry shape effect on collision process The elasticplastic material is applied to simulate the ice material model and the crushable foam material is also used for comparison
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If the ice model is capable of predicting a reasonable pressure–area relationship for the Strength Design strategy the material model is considered sufficiently accurate to simulate ice loads during shipiceberg interactions for the Sharedenergy Design strategy Therefore if the pressure–area curve of a rigid plateiceberg collision agrees with the ISO rule the ice material model can be used in shipiceberg collisions
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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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In the 1980’s the typical numerical methodology to model iceberg ice was based on the use of simplified analytical equations and ice failure strength eg Cammaert and Tsinker and Arockiasamy et al The crushing and crack of iceberg ice during impact were not considered at all
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model using a crushable foam material model in a dynamic analysis This material model of Gag non’s is taken into account as it is proposed based on a collision experiment between a ship and ice
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A numerical model of ice crushing using a foam analogue Cold Regions Science and Technology 2011 65 3 335 350 101016gions201011004 2s2079251594816 14 Jebaraj C Swamidas A S J Shih L Y Munaswamy K Finite element analysis of shipice interaction Computers and Structures 1992 43 2 205 221 10101600457949
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Sep 15 2015 · Read A numerical model for ice crushing on concave surfaces Ocean Engineering on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips
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A numerical model of ice crushing using a foam analogue Cold Regions Science and Technology 65 3 335–350 Gagnon RE Bugden A 2008 2Dimensional edge crushing tests on thick sections of ice confined at the section faces
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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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foam material model was used for the bergy bit in order to model previously observed ice behavior where the ice contact interface consists of a relatively intact hard zone of ice surrounded by softer pulverized ice The simulation produced reasonable values for the load pressure and impact duration values obtained in the field
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To realize ice breaking in numerical simulations a damage variable was introduced to trigger fracture initiation and evolution The nominal contact areadependent energy per unit area as a damage to fracture was newly proposed from the test results composed of a crushing force versus indenter stroke
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assess the model identification the crushing of a small metallic confined OCCF part has been simulated by the finite element model and the numerical results compared with the experimental data obtained during a crushing test under quasistatic condition
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model using a crushable foam material model in a dynamic analysis This material model of Gag non’s is taken into account as it is proposed based on a collision experiment between a ship and ice
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Sep 01 2012 · Read Numerical simulations of a tanker collision with a bergy bit incorporating hydrodynamics a validated ice model and damage to the vessel Cold Regions Science and Technology on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips
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The present work employs two realistic ice load models a dynamic 4D pressure model and a validated crushable foam ice model Results using these realistic ice load models lend credence to
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Numerical Simulation of Crushing and Bending Failure of Ice Using SPH Jitapriya Das and Sören Ehlers The comparison of these SPHbased numerical simulations with the available literature will serve as a basis to discuss the potential advantages and shortcomings of the mesh free particle method used to model failure of sea ice
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A numerical model of ice crushing using a foam analogue Cold Regions Science and Technology 2011 65 3 335 350 101016gions201011004 2s2079251594816 14 Jebaraj C Swamidas A S J Shih L Y Munaswamy K Finite element analysis of shipice interaction Computers and Structures 1992 43 2 205 221 10101600457949
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The numerical ice material model was based on a crushable foam model MAT 63 with modified material properties applied
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In the 1980’s the typical numerical methodology to model iceberg ice was based on the use of simplified analytical equations and ice failure strength eg Cammaert and Tsinker 3 and Arockiasamy et al 2 The crushing and crack of iceberg ice during impact were not considered at all
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numerical activity were carried out using LSDYNA – a commercially available nonlinear finite element code widely diffuse for crash A robust numerical model of the intersections was initially created and validated against the first test results The validated model was then used to
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explicit numerical model of a steel grillage The main drawback was that the ice load model was largely unrealistic in terms of the distributed pressure and ice motions The present work employs two realistic ice load models a dynamic 4D pressure model and a validated crushable foam ice model Results using these realistic ice
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The parameters of each material model of ice will be defined and more realistic numerical model for ice will be proposed through comparison study with experimental results After that the results of numerical simulations for a collision between PSS and sea ice with five numerical models using LSDYNA software will be represented
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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 highpressure and lowpressure zones the rapid removal of ice through melting and the transformation of relatively intact ice highpressure zone material
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ice where ice impact and clearing dominates the interaction This paper presents results of the numerical analysis on ship manoeuvring in level ice conditions with an added element of complexity ice failure Analysis of the numerical results shows the effects of ice conditions and ship motions on the computed forces and moments
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being planned for future generations of the model Each iceice collision event within the pack is treated using a method that can be traced to Popov et al 1967 The method was updated to reflect ice contact pressurearea effects Daley 1999 and used for a variety of shipice
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Abstract However such behaviour may not be well described using traditional numerical approaches such as the finite element method This paper presents a lumped mass numerical model which can accommodate high degrees of deformation and material failure The essence of this model is to discretize a block of material into contiguous element volumes
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Using both previous and new experimental results the discreteelement model is calibrated and validated to represent Fontainebleau sand a quartz sand The results obtained show that when breakage is present the inclusion of a grading index in the description of critical states is advantageous
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Jul 01 2015 · Read An elastic–plastic ice material model for shipiceberg collision simulations Ocean Engineering on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips
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possibility of using finite element modelling with cohesive elements and a simplified analytical model for the hail impact case to predict damage initiation in composite materials The work is based on experiments and numerical modelling for characterising the ice behaviour and damage initiation of the composite material EXPERIMENTS
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Sep 01 2007 · A hard crushable foam material model was used for the growler in order to model previously observed ice behavior where the ice contact interface consists of a relatively intact hard zone of ice surrounded by softer pulverized ice
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Transient solidliquid phase change occurring in a phasechange material PCM embedded in a metal foam is investigated Natural convection in the melt is considered Volumeaveraged mass and momentum equations are employed with the BrinkmanForchheimer extension to the Darcy law to model the porous resistance
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No Ice Crush Throw Pillow buy will send an email asking for you to send them any private information within an email If you get an email like this speak to your credit card organization while using number on the rear of your credit card
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Numerical simulation plays an indispensable role in the manufacturing process speeding product design time while improving quality and performance Recently analysts and designers have begun to use numerical simulation alone as an acceptable means of validation In many disciplines virtual prototypingemploying numerical
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