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Lishman, B; Sammonds, P (2013)
Publisher: London South Bank University
Languages: English
Types: Unknown
Friction between sea ice floes is a control on rafting, ridging, and in-plane sliding, and is therefore relevant to a range of engineering problems. Understanding sea ice friction is complicated, because the contact surfaces abrade and melt as sliding occurs. Currently most representations of sea ice friction (for example in discrete element modelling) use Amontons’ law for friction, with a wide uncertainty over μ. In this paper we discuss recent work on incorporating memory into an empirical model of sea ice friction. We present a simple model with rate and state dependence derived from laboratory results, and show how this model predicts varying friction on a sliding surface under varying slip rate. We then use this model within a discrete element model to investigate the importance of friction modelling to the modelling of sea ice behaviour as aggregated across many floes.
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