Wikidata:Property proposal/Coefficient of friction
coefficient of friction
editOriginally 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. |
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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)