Critical slip and time dependence in sea ice friction
Lishman, B and Sammonds, P (2013). Critical slip and time dependence in sea ice friction. Cold Regions Science and Technology. 90-91, pp. 9 - 13.
|Authors||Lishman, B and Sammonds, P|
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.
|Journal||Cold Regions Science and Technology|
|Journal citation||90-91, pp. 9 - 13|
|Digital Object Identifier (DOI)||doi:10.1016/j.coldregions.2013.03.004|
|23 Jun 2013|
|Publication process dates|
|Deposited||17 Jan 2017|
|Accepted author manuscript|
CC BY-NC-ND 4.0
Accepted author manuscript
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