Wikidata:Property proposal/Coefficient of friction
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coefficient of friction
[edit]Originally proposed at Wikidata:Property proposal/Natural science
| Description | Dimensionless scalar value which describes the ratio of the force of friction between two bodies and the force pressing them together. |
|---|---|
| Represents | material (Q214609) > mechanical property (Q5725005) > coefficient of friction (Q1932524) |
| Data type | Quantity |
| Template parameter | This proprety request is part of the project of creating an infobox for materials |
| Domain | Mechanical property of all solid Materials |
| Allowed values | Any number. Qualifiers : together with (P1706) (mandatory), determination method or standard (P459) (mandatory), temperature (P2076), under pressure (P2077), speed (P2052), surface roughness, environment, force |
| Allowed units | Dimensionless |
| Example 1 | aluminium (Q663) → 0.61 with together with (P1706) → steel (Q11427), speed (P2052) → 0 m/s, environment → Dry (Qxxx) and Clean (Qxxx) |
| Example 2 | brass (Q39782) → 0.35-0.51 with together with (P1706) → steel (Q11427), speed (P2052) → 0 m/s, environment → Dry (Qxxx) and Clean (Qxxx) |
| Example 3 | copper (Q753) → 0.53 with together with (P1706) → steel (Q11427), speed (P2052) → 0 m/s, environment → Dry (Qxxx) and Clean (Qxxx) |
| Source | w:Friction#Coefficient_of_friction |
| Planned use | Creating an infobox for materials |
Motivation
This proprety request is part of the project of creating an infobox for materials.
Discussion
Support but it definitely doesn't make sense without qualifiers, as you suggest. ArthurPSmith (talk) 16:53, 27 July 2018 (UTC)
- Agreed. Most of PEEK datasheets give the kinematic coefficient of friction on a normalized steel plate. It is measured on such machines : https://www.youtube.com/watch?v=wtTO3bAW7j4 according to standards such as ISO 8295, ASTM D1894, JIS K 7125, DIN 53375... At least, it helps to compare different materials. I added the determination method as mandatory. It could also be usefull to gather some experimental data on other interfaces. This makes me think that there is 2 different types of coefficient of friction : static and dynamic. It could be stated in the determination method so that is it usefull to make 2 properties ? --Thibdx (talk) 22:07, 27 July 2018 (UTC)
- Support David (talk) 07:35, 28 July 2018 (UTC)
@Thibdx, ديفيد عادل وهبة خليل 2, ArthurPSmith: 
Done: coefficient of friction (P5575). − Pintoch (talk) 09:05, 5 August 2018 (UTC)