Author(s): Arttu Polojärvi; Ville-Pekka Lilja; Jukka Tuhkuri; Jani Paavilainen
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Abstract: Three-dimensional numerical modelling of an intact ice sheet can be performed using different techniques. Models aiming for computational efficiency often rely on lattices of beams or different types of springs, that is, ice sheet is modelled using a network of beams or springs, which connect rigid bodies to each other. This technique is often used in the context of discrete element method, combined finite-discrete element method, and bonded particle models. Often the use of lattices introduces scale effects, which show in the response of a modeled ice sheet to external loading. Another source of scale effects can be the used material model. This paper discusses the scale effects of a model, which is based on a network of Timoshenko beams that fracture through a cohesive softening process. The results appear to scale as would be expected for quasi-brittle materials.
Year: 2020