Effects of model size and particle size on the response of sea-ice samples created with a hexagonal-close-packing pattern in discrete-element method simulations

Di, Shaocheng; Yang, Xue; Bai, Xiaolong; Wang, Qing

doi:10.1016/j.partic.2017.04.004

Cited by 17 publications

(8 citation statements)

References 17 publications

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“…The results show that the size effects of Poisson's ratio, compressive strength, elastic modulus and fracture toughness are not obvious, while the bending strength decreases with the increase of the model size small. Di and Xue et al [207] found that the macro-mechanical properties decreased with the increase of particle size and sample size D / L when they studied the sea-ice sample.…”

Section: Size Effectmentioning

confidence: 99%

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Jiang

Tang

et al. 2020

Int J Adv Manuf Technol

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In recent years, the discrete element method (DEM) has been used to model the bulk material, especially for the brittle materials (such as rocks, ceramics, concrete, ice, etc.) with various mechanical properties or responses by setting serials of contact properties (such as bonds) in the particle assembly. These bonds can withstand a certain amount of force and/or moment, so that the stresses executed in the bond can be used for determining the initiation and propagation of micro-crack. There are increasing evidences over the last twenty years that the DEM is becoming an effective numerical method to simulate the cracking, crushing and deformation of continuous media under external loads. The DEM has now been widely used in the field of processing and machining of rock, ceramic, concrete and other brittle materials. In this paper, the theoretical principles, formulations, contact models as well as the numerical solving processes of DEM are introduced. The applications of DEM for the machining processes of brittle and rigid materials such as ceramics are described and reviewed in detail, with future development trend also discussed.

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Section: Size Effectmentioning

confidence: 99%

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Jiang

Tang

et al. 2020

Int J Adv Manuf Technol

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“…The parameters of the bond model considered in this study were the bond Young's modulus (E b ), width (2R b ), length (l b ), thickness (h b ), ratio of the normal to shear stiffness (λ ns ), normal strength (σ b ), and shear strength (τ b ). The normal and shear bond strengths were applied to be identical [31][32][33]. In the bending problem, the effect of the contact point of the load was not significant [25].…”

Section: Parameters For Ice Modelingmentioning

confidence: 99%

“…Sea ice is quasi-brittle heterogenous and anisotropic. In the present study, for simplicity, the sea ice was assumed to be homogeneous, anisotropic, and elastic brittle [24,25,32]. The ice beam was represented by the particle assembly with a regular arrangement such as the Hexagonal Close Packing (HCP) [24,25,32].…”

Section: Three-point Bending Tests and Uniaxial Compressive Tests Of Ice Beammentioning

confidence: 99%

Parametric Study on Strength Characteristics of Two-Dimensional Ice Beam Using Discrete Element Method

2021

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Strength characteristics of a two-dimensional ice beam were studied using a discrete element method (DEM). The DEM solver was implemented by the open-source discrete element method libraries. Three-point bending and uniaxial compressive tests of the ice beam were simulated. The ice beam consisted of an assembly of disk-shaped particles with a particular thickness. The connection of the ice particles was modelled using a cuboid element, which represents a bond. If the stress acting on the bond exceeded the bond strength criterion, the bond started to break, explaining the cracking of the ice beam. To find out the effect of the local parameters of the contact and bond models on the ice fracture, we performed numerical simulations for various bond Young‘s modulus of the particles, the bond strength, and the relative particle size ratio.

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“…In this way, a breakable ice model becomes available. It should be stated that the interparticle tensile and shear bonding strength of ice in the DEM model are affected by many factors, including particle shape, particle radius, number of layers, and arrangement modes (regular or random arrangement) [52]. According to previous studies [53], the interparticle tensile and shear bonding strength of ice in random arrangement mode should be larger than macroscopic measured tensile and shear strength of sea ice [54], so that the simulated ice behaviors including compression and bending agree with those of real ice.…”

Section: Ice Model (Dem)mentioning

confidence: 99%

Numerical Simulation of a Polar Ship Moving in Level Ice Based on a One-Way Coupling Method

Chen

Zhong

et al. 2020

JMSE

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In most previous ice–ship interaction studies involving fluid effects, ice was taken as unbreakable. Building breakable level ice on water domain is still a big challenge in numerical simulation. This paper overcomes this difficulty and presents a numerical modeling of a ship moving in level ice on the water by using a one-way CFD-DEM (computational fluid dynamics-discrete element method) coupling method. The detailed numerical processes and techniques are introduced. The ice crack propagation process including radial and circular cracks have been observed. Numerical results are compared with previous experimental data and good agreement has been achieved. The results show that water resistance is an order of magnitude smaller than ice resistance during the ice-breaking process. Ice resistance shows strong oscillation along with ice failure process, which are affected by ship speed and ice thickness significantly.

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Effects of model size and particle size on the response of sea-ice samples created with a hexagonal-close-packing pattern in discrete-element method simulations

Cited by 17 publications

References 17 publications

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Parametric Study on Strength Characteristics of Two-Dimensional Ice Beam Using Discrete Element Method

Numerical Simulation of a Polar Ship Moving in Level Ice Based on a One-Way Coupling Method

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