Abstract
Oscillatory shear was applied to a thin film of squalane confined between two atomically smooth surfaces of mica. When the applied stress exceeded the yield stress, the sample made a transition from sticking to stick-slip. In the stick-slip regime close to the transition, extensive viscous stress fluctuations, in the form of triangular spikes on a constant baseline, were observed. The duration of these spikes was much larger than the oscillation period. Analysis of the raw waveforms suggest that the structure of the sample changed after each stick-slip event and that the stress fluctuations were correlated with the changes in the yield stress and the slip length.
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© 1996 Springer Science+Business Media Dordrecht
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Demirel, A.L., Granick, S. (1996). What is Fluctuating in a Confined Liquid in the Stick-Slip Regime?. In: Persson, B.N.J., Tosatti, E. (eds) Physics of Sliding Friction. NATO ASI Series, vol 311. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8705-1_5
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DOI: https://doi.org/10.1007/978-94-015-8705-1_5
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