TY  - JOUR
AU  - Hutt, W.
AU  - Persson, Bo
TI  - Soft matter dynamics: Accelerated fluid squeeze-out during slip
JO  - The journal of chemical physics
VL  - 144
IS  - 12
SN  - 1089-7690
CY  - Melville, NY
PB  - American Institute of Physics
M1  - FZJ-2019-01207
SP  - 124903
PY  - 2016
AB  - Using a Leonardo da Vinci experimental setup (constant driving force), we study the dependency of lubricated rubber friction on the time of stationary contact and on the sliding distance. We slide rectangular rubber blocks on smooth polymer surfaces lubricated by glycerol or by a grease. We observe a remarkable effect: during stationary contact the lubricant is only very slowly removed from the rubber-polymer interface, while during slip it is very rapidly removed resulting (for the grease lubricated surface) in complete stop of motion after a short time period, corresponding to a slip distance typically of order only a few times the length of the rubber block in the sliding direction. For an elastically stiff material, poly(methyl methacrylate), we observe the opposite effect: the sliding speed increases with time (acceleration), and the lubricant film thickness appears to increase. We propose an explanation for the observed effect based on transient elastohydrodynamics, which may be relevant also for other soft contacts
LB  - PUB:(DE-HGF)16
C6  - pmid:27036475
UR  - <Go to ISI:>//WOS:000373644400058
DO  - DOI:10.1063/1.4944384
UR  - https://juser.fz-juelich.de/record/860453
ER  -