A bonded discrete element method for modeling ship–ice interactions in broken and unbroken sea ice fields

Jou, Oriol; Celigueta, Miguel Ángel; Latorre, Salvador; Arrufat, Ferrán; Oñate, Eugenio

doi:10.1007/s40571-019-00259-8

Cited by 36 publications

(17 citation statements)

References 31 publications

(49 reference statements)

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“…The discrete element method (DEM) is proven as a powerful numerical method for modeling the granular material flow regimes [21][22][23][24], bulk material characterization [25,26], breakage models [27][28][29][30][31], etc. In DEM, individual interactions of the particles are monitored contact by contact and the particle motion is modeled particle by particle [32].…”

Section: Methodsmentioning

confidence: 99%

Breakage behavior of biomass pellets: an experimental and numerical study

2020

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The presence and generation of fines and dust in the bulk of biomass pellets have inflicted several problems in the supply chain during transportation and storage, and the breakage behavior of pellets has been scarcely studied so far. Fines and dust are the consequences of impact and abrasive forces through the whole supply chain; however, the breakage happens at the particle level. Therefore, to study the fines generation, first, the breakage behavior of individual pellets should be understood, and then, the behavior of the bulk materials in operational conditions can be investigated. This paper aims to investigate the breakage behavior of individual pellets under experimental compression tests and to introduce a calibrated numerical model using discrete element method (DEM) in order to pave the way for further studies on pellet breakage. For that purpose, seven different types of biomass pellets were studied experimentally, and then, a calibrated model was introduced via the Timoshenko-Ehrenfest beam theory using DEM. Results show that the model could reasonably predict the breakage behavior of pellets under uniaxial and diametrical compressions. The findings could help to develop a new design of the equipment for transportation and handling of biomass pellets with the aim to reduce the amount of generating fines and dust.

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Section: Methodsmentioning

confidence: 99%

Breakage behavior of biomass pellets: an experimental and numerical study

2020

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“…Jou et al [50] adopted a bonded DEM to simulate ship interaction with a single finite-size ice floe, focusing on the influence of floe geometry on contact force and failure mode. DEM particles are joined together, allowing cracking through the ice sheet.…”

Section: Ice Floementioning

confidence: 99%

A Review of Computational Simulation Methods for a Ship Advancing in Broken Ice

Huang

2022

JMSE

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Apart from breaking level ice, polar ships can interact with broken ice in various scenarios. In recent years, computational simulation models have increasingly been used for the evaluation of ship operability under broken ice conditions, presenting some challenging issues. This paper reviews existing simulation methods used to estimate ship performance and ice loads for ships advancing continuously in broken ice fields. Models for different types of broken ice, including ice floes, ice ridges, brash ice, and sliding ice pieces, are reviewed separately. A ship’s response in broken ice is divided into two categories: resistance, which relates to the overall ship performance, and local loads, which relates to structural safety. This review shows that most existing models are proposed for unbreakable ice particles, which are only applicable to broken ice of small size; most models treat fluid flow with extensive simplification, which does not reflect the influence of a ship’s wake or bow waves, and most models are aimed at resistance estimation, adopting elastic or viscoelastic contact models which do not include ice crushing. As for future work, it is suggested that more effort should be assigned to simulating a ship’s interaction with ice ridges and sliding ice pieces, the modelling of breakable ice floes, and the coupling of the Discrete Element Method (DEM) and Computational Fluid Dynamics (CFD). More attention to the local ice load estimation is also encouraged.

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“…In the DEM, large deformations and discontinuous properties of ice can be modeled using the movement of individual ice blocks within it [33]. In addition, owing to its good performance in modeling the continuous breakage of ice, DEM has wide applications in ice engineering, e.g., ice ridge property experiments [34,35], interaction of ice with ships [36][37][38], and offshore structures [39][40][41][42]. Furthermore, the coupled FEM-DEM or FDEM provides a new alternative for analyzing the breaking process, in which the FEM is used to calculate the deformation of individual particles, while DEM is used for modeling the contact and movement of the particles or fragments [43,44].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Ice Rubble with a Freeze-Bond Model in Dilated Polyhedral Discrete Element Method

Zhai¹,

Liu²,

Ji³

2022

Computer Modeling in Engineering &Amp; Sciences

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Freezing in ice rubble is a common phenomenon in cold regions, which can consolidate loose blocks and change their mechanical properties. To model the cohesive effect in frozen ice rubble, and to describe the fragmentation behavior with a large external forces exerted, a freeze-bond model based on the dilated polyhedral discrete element method (DEM) is proposed. Herein, imaginary bonding is initialized at the contact points to transmit forces and moments, and the initiation of the damage is detected using the hybrid fracture model. The model is validated through the qualitative agreement between the simulation results and the analytical solution of two bonding particles. To study the effect of freeze-bond on the floating ice rubble, punch-through tests were simulated on the ice rubble under freezing and nonfreezing conditions. The deformation and resistance of the ice rubble are investigated during indenter penetration. The influence of the internal friction coefficient on the strength of the ice rubble is determined. The results indicate that the proposed model can properly describe the consolidated ice rubble, and the freeze-bond effect is of great significance to the ice rubble properties.

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A bonded discrete element method for modeling ship–ice interactions in broken and unbroken sea ice fields

Cited by 36 publications

References 31 publications

Breakage behavior of biomass pellets: an experimental and numerical study

Breakage behavior of biomass pellets: an experimental and numerical study

A Review of Computational Simulation Methods for a Ship Advancing in Broken Ice

Numerical Analysis of Ice Rubble with a Freeze-Bond Model in Dilated Polyhedral Discrete Element Method

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