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Sealing is at the origin of rubber slipping on wet roads
- Source :
- Nature materials. 3(12)
- Publication Year :
- 2004
-
Abstract
- Loss of braking power and rubber skidding on a wet road is still an open physics problem, since neither the hydrodynamical effects nor the loss of surface adhesion that are sometimes blamed really manage to explain the 20-30% observed loss of low speed tire-road friction. Here we advance a novel mechanism based on sealing of water-filled substrate pools by the rubber. The sealed-in water effectively smoothens the substrate, thus reducing the viscoelastic dissipation in bulk rubber induced by surface asperities, well established as a major friction contribution. Starting with the measured spectrum of asperities one can calculate the water-smoothened spectrum and from that the predicted friction reduction, which is of the right magnitude. The theory is directly supported by fresh tire-asphalt friction data.<br />Comment: 5 pages, 4 figures. Published on Nature Materials (November 7th 2004)
- Subjects :
- Materials science
Friction
Surface Properties
Soft interfaces
FOS: Physical sciences
Mechanism based
Viscoelasticity
Settore FIS/03 - Fisica della Materia
Natural rubber
Hardness
Materials Testing
General Materials Science
Computer Simulation
Composite material
Slipping
Condensed Matter - Materials Science
Viscosity
Mechanical Engineering
Accidents, Traffic
Materials Science (cond-mat.mtrl-sci)
Water
General Chemistry
Dissipation
Condensed Matter Physics
Elasticity
Hydrocarbons
Substrate (building)
Low speed
Models, Chemical
Mechanics of Materials
visual_art
Friction reduction
visual_art.visual_art_medium
Rheology
Subjects
Details
- ISSN :
- 14761122
- Volume :
- 3
- Issue :
- 12
- Database :
- OpenAIRE
- Journal :
- Nature materials
- Accession number :
- edsair.doi.dedup.....23478dabe0f9cf281d2c1cd2b0c418ce