Rolling friction of a viscous sphere on a hard plane
| Autor: | Nikolai V. Brilliantov, Thorsten Poeschel |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Condensed Matter - Materials Science
Materials science Deformation (mechanics) Plane (geometry) Rolling resistance Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences General Physics and Astronomy Motion (geometry) Mechanics Viscoelasticity Physics::Fluid Dynamics Speed of sound Dissipative system Relaxation (physics) |
| Zdroj: | Europhysics Letters (EPL). 42:511-516 |
| ISSN: | 1286-4854 0295-5075 |
| DOI: | 10.1209/epl/i1998-00281-7 |
| Popis: | A first-principle continuum-mechanics expression for the rolling friction coefficient is obtained for the rolling motion of a viscoelastic sphere on a hard plane. It relates the friction coefficient to the viscous and elastic constants of the sphere material. The relation obtained refers to the case when the deformation of the sphere $\xi$ is small, the velocity of the sphere $V$ is much less than the speed of sound in the material and when the characteristic time $\xi/V$ is much larger than the dissipative relaxation times of the viscoelastic material. To our knowledge this is the first ``first-principle'' expression of the rolling friction coefficient which does not contain empirical parameters. Comment: 6 pages, 2 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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