| Issue |
Europhys. Lett.
Volume 61, Number 5, March 2003
|
|
|---|---|---|
| Page(s) | 620 - 624 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2003-00116-1 | |
| Published online | 01 February 2003 | |
The effect of inertial normal force on the rolling friction of a soft sphere on a hard plane
Department of ISE, The HK Polytechnic University Hung Hom, Kowloon, Hong Kong, PRC
Corresponding author: drxuyan@bigfoot.com
Received:
5
June
2002
Accepted:
12
December
2002
Previously, in the rolling-friction analysis, the normal compression force was assumed to be independent of the rolling speed. In this study, it is found that the normal compression force of a soft sphere on a hard plane depends on its rolling speed as the inertial force is taken into consideration. A new expression of the rolling frictional torque, which is not proportional to the apparent normal force as the previous one is derived. It is shown that the relation between rolling frictional torque and rolling speed is nonlinear as the inertial force is considered.
PACS: 46.55.+d – Tribology and mechanical contacts / 62.20.-x – Mechanical properties of solids / 81.40.-z – Treatment of materials and its effects on microstructure and properties
© EDP Sciences, 2003
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