2014 Fiscal Year Final Research Report
Biomimetics of sandfish's scales as tribomaterials with new tribomechanism
| Project/Area Number |
25630037
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Design engineering/Machine functional elements/Tribology
|
|---|
| Research Institution | Okayama University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2013-04-01 – 2015-03-31
|
| Keywords | マイクロトライボロジー / バイオミメティクス / 爬虫類 |
|---|
| Outline of Final Research Achievements |
Sandfish (Scincus scincus), which is kind of reptile living in desert, can move like swimming in sand. In this study, a micro structure of sandfish’s scales was investigated, and their tribological properties under μN loads were measured. Cuticle-like structure same as human hairs is observed on the scales. Detected elements on the scales using X-ray photoelectron spectroscopy were O, C, N, and S. A contact angle of sandfish’s scale was around 90°;. Under μN loads, with the exception of a few frictional conditions, friction forces of sandfish’s scales were lower than PTFE and PI. Friction coefficients of sandfish’s scales were around 0.13, which was almost same of PI. Under mN loads, using a SUJ2 ball with a diameter of 1 mm, wear of sandfish scale was not occurred or much lower than those of PTFE and PI. When wear was not happened for sandfish’s scale in the relative low contact pressure, a friction coefficient of the sandfish’s scale was lower than those of PI and PTFE.
|
| Free Research Field |
トライボロジー
|
