Wikidata:Property proposal/Coefficient of friction

coefficient of friction

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Originally proposed at Wikidata:Property proposal/Natural science

DescriptionDimensionless scalar value which describes the ratio of the force of friction between two bodies and the force pressing them together.
Representsmaterial (Q214609) > mechanical property (Q5725005) > coefficient of friction (Q1932524)
Data typeQuantity
Template parameterThis proprety request is part of the project of creating an infobox for materials
DomainMechanical property of all solid Materials
Allowed valuesAny number. Qualifiers : together with (P1706) (mandatory), determination method or standard (P459) (mandatory), temperature (P2076), under pressure (P2077), speed (P2052), surface roughness, environment, force
Allowed unitsDimensionless
Example 1aluminium (Q663) → 0.61 with together with (P1706)steel (Q11427), speed (P2052) → 0 m/s, environment → Dry (Qxxx) and Clean (Qxxx)
Example 2brass (Q39782) → 0.35-0.51 with together with (P1706)steel (Q11427), speed (P2052) → 0 m/s, environment → Dry (Qxxx) and Clean (Qxxx)
Example 3copper (Q753) → 0.53 with together with (P1706)steel (Q11427), speed (P2052) → 0 m/s, environment → Dry (Qxxx) and Clean (Qxxx)
Sourcew:Friction#Coefficient_of_friction
Planned useCreating an infobox for materials

Motivation

This proprety request is part of the project of creating an infobox for materials.

Discussion

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)[reply]

@Thibdx, ديفيد عادل وهبة خليل 2, ArthurPSmith:   Done: coefficient of friction (P5575). − Pintoch (talk) 09:05, 5 August 2018 (UTC)[reply]