TY  - JOUR
AU  - Persson, B. N. J.
AU  - Volokitin, A. I.
TI  - Rubber friction on smooth surfaces
JO  - The European physical journal / E
VL  - 21
SN  - 1292-8941
CY  - Berlin
PB  - Springer
M1  - PreJuSER-55235
SP  - 69 - 80
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - We study the sliding friction for viscoelastic solids, e.g., rubber, on hard flat substrate surfaces. We consider first the fluctuating shear stress inside a viscoelastic solid which results from the thermal motion of the atoms or molecules in the solid. At the nanoscale the thermal fluctuations are very strong and give rise to stress fluctuations in the MPa-range, which is similar to the depinning stresses which typically occur at solid-rubber interfaces, indicating the crucial importance of thermal fluctuations for rubber friction on smooth surfaces. We develop a detailed model which takes into account the influence of thermal fluctuations on the depinning of small contact patches (stress domains) at the rubber-substrate interface. The theory predicts that the velocity dependence of the macroscopic shear stress has a bell-shaped form, and that the low-velocity side exhibits the same temperature dependence as the bulk viscoelastic modulus, in qualitative agreement with experimental data. Finally, we discuss the influence of small-amplitude substrate roughness on rubber sliding friction.
KW  - Computer Simulation
KW  - Elasticity
KW  - Friction
KW  - Models, Chemical
KW  - Models, Molecular
KW  - Rubber: chemistry
KW  - Stress, Mechanical
KW  - Surface Properties
KW  - Viscosity
KW  - Rubber (NLM Chemicals)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:17093895
UR  - <Go to ISI:>//WOS:000241950000009
DO  - DOI:10.1140/epje/i2006-10045-9
UR  - https://juser.fz-juelich.de/record/55235
ER  -