Kumar, C. , Speck, T. and Le, V. (2021) Local contact formation during sliding on soft adhesive surfaces with complex microstructuring. Tribology International, 163, 107180. (doi: 10.1016/j.triboint.2021.107180)
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Abstract
Friction on biological-like micro-structured surfaces has been investigated. Using a bio-replication technique, complex surface morphologies found in plant leaves were transferred onto viscoelastic substrates. A nano-indenter was modified, permitting in-situ real contact junctions visualisation. Effects of applied normal load and sliding speed on the friction response were evaluated. All four surfaces demonstrated a decrease in the friction coefficient (but dissimilar behaviors) with increasing normal load. In-situ videos revealed different contact formation under shearing, which originated from the specific surface topographies. An increase in friction coefficient with rising sliding speed was found out. This speed-dependent friction response was qualitatively correlated with material loss factor and the different friction incremental rates were discussed in the light of strain localisation in the confined topographies.
| Item Type: | Articles |
|---|---|
| Additional Information: | This work was financially supported by the (German Research Foundation (Deutsche Forschungsgemeinschaft: DFG)) under the framework of the (International Research Training Group (IRTG) ‘Soft Matter Science - 1642′). CK and TS acknowledge additional funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy – EXC-2193/1 – 390951807. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Kumar, Dr Charchit |
| Authors: | Kumar, C., Speck, T., and Le, V. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Tribology International |
| Publisher: | Elsevier |
| ISSN: | 0301-679X |
| ISSN (Online): | 1879-2464 |
| Published Online: | 10 July 2021 |
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