A free, square, point-loaded ice sheet: A finite element-discrete element approach

Lilja, Ville-Pekka; Polojärvi, Arttu; Tuhkuri, Jukka; Paavilainen, Jani

doi:10.1016/j.marstruc.2019.102644

Cited by 8 publications

(2 citation statements)

References 98 publications

(156 reference statements)

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“…The numerical model employed is a three-dimensional discrete element method (DEM) code described in detail by Polojärvi (2022). The model was verified to describe the response and the fracture of an ice floe by Lilja et al (2019aLilja et al ( , b, 2021 and its results were successfully validated against laboratory-scale ice-structure interaction experiments by Polojärvi (2022). On a general level, the model implementation is rather standard for DEM, as a central difference scheme is utilized for explicit time-stepping, rigid discrete particles interact through pairwise contacts, and deformation is described by using deformable finite elements connecting the rigid particles.…”

Section: Numerical Modelmentioning

confidence: 99%

Three-dimensional discrete element simulations on pressure ridge formation

Muchow,

Polojärvi

2024

Preprint

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Abstract. This study presents the first three-dimensional discrete element method simulations on pressure ridge formation. Pressure ridges are an important feature of the sea-ice cover, as they contribute to the mechanical thickening of ice and likely limit the strength of sea ice in large scale. We validate the simulations against laboratory-scale experiments, confirming their accuracy in predicting ridging forces and ridge geometries. Then we demonstrate that Cauchy-Froude scaling applies for translating laboratory-scale results on ridging to full-scale scenarios. We show that non-simultaneous failure, where an ice sheet fails at distinct locations across the ridge length, is required for an accurate representation of the ridging process. This process cannot be described by two-dimensional simulations. We also find a linear relationship between the ridging forces and the ice thickness, contrasting with earlier results in the literature obtained by two-dimensional simulations.

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Section: Numerical Modelmentioning

confidence: 99%

Three-dimensional discrete element simulations on pressure ridge formation

Muchow,

Polojärvi

2024

Preprint

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“…ii) the Young's modulus of an ice sheet, E, corresponds to the effective Young's modulus, E, computed for each sheet in [Lilja et al, 2019a] in Load case I, |v x | = 0.1 m/s; and that iii) the characteristic length of an ice sheet, l ch , corresponds to the effective characteristic length, l ch,eff , computed for each sheet in [Lilja et al, 2019b].…”

Section: On the Ice-structure Interaction Simulationsmentioning

confidence: 99%