Abstract
The effect of asperity flattening of a rough spherical contact during cyclic loading is investigated experimentally. Two types of surfaces are examined; the first is an "as-manufactured" isotropic surface and the second a smooth "laser-polished" surface. Both the surfaces exhibit a large amount of hysteresis of the load-displacement curve during the first load-unload cycles. This hysteresis is found to decrease as a function of the number of load cycles. A comparison of the experimental results with results obtained from a numerical model for a rough spherical contact shows good correlation. The model shows that for rough surfaces the total displacement is a function of the contacting asperities while for smooth surfaces the main contribution comes from the bulk displacement.
| Original language | English |
|---|---|
| Pages (from-to) | 347-355 |
| Number of pages | 9 |
| Journal | Tribology Letters |
| Volume | 40 |
| Issue number | 3 |
| DOIs | |
| State | Published - Dec 2010 |
| Externally published | Yes |
Keywords
- Contact mechanics
- Cyclic load-unload
- Rough surface
- Spherical contact
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