TERMIUM Plus®

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COEFFICIENT FRICTION REST [1 record]

Record 1 1998-09-29

English

Subject field(s)
  • Lubrication Technology
  • Physics of Solids
DEF

The ratio of the maximum possible frictional force, paralled to the surface of contact, which acts to prevent two bodies in contact, and at rest with respect to each other, from sliding or rolling over each other, to the force, normal to the surface of contact, with which the bodies press against each other.

CONT

The coefficient of kinetic friction for smooth metal surfaces ... ranges from 0.15 to 0.5 and is slightly less usually than the coefficient of static or limiting friction. These coefficients are independent of the area of the surfaces in contact.

Key term(s)
  • static friction coefficient

French

Domaine(s)
  • Tribologie
  • Physique des solides
CONT

[...] un corps placé au contact d'une surface rugueuse et soumis à une force F peut être en équilibre pourvu que les composantes tangentielle Ft et normale Fn de la force F vérifient la condition [...] où f0, appelé coefficient de frottement statique, dépend des surfaces en contact. Par exemple, f0 vaut 0,75 dans le cas du contact entre pierres calcaires [...]

CONT

[...] [le coefficient de frottement] est indépendant de l'étendue de la surface de contact [...]; il ne dépend pratiquement pas de la vitesse, sauf au démarrage, où il est augmenté d'environ 30 % (il s'agit, alors, du coefficient d'adhérence).

Spanish

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