Critical slip and time dependence in sea ice friction

Lishman, B., Sammonds, P. R. and Feltham, D. L. ORCID: https://orcid.org/0000-0003-2289-014X (2013) Critical slip and time dependence in sea ice friction. Cold Regions Science and Technology, 90-91. pp. 9-13. ISSN 0165-232X doi: 10.1016/j.coldregions.2013.03.004

Abstract/Summary

Recent research into sea ice friction has focussed on ways to provide a model which maintains much of the clarity and simplicity of Amonton's law, yet also accounts for memory effects. One promising avenue of research has been to adapt the rate- and state- dependent models which are prevalent in rock friction. In such models it is assumed that there is some fixed critical slip displacement, which is effectively a measure of the displacement over which memory effects might be considered important. Here we show experimentally that a fixed critical slip displacement is not a valid assumption in ice friction, whereas a constant critical slip time appears to hold across a range of parameters and scales. As a simple rule of thumb, memory effects persist to a significant level for 10 s. We then discuss the implications of this finding for modelling sea ice friction and for our understanding of friction in general.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/34578
Identification Number/DOI	10.1016/j.coldregions.2013.03.004
Refereed	Yes
Divisions	Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
Publisher	Elsevier
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