Friction factor

Coulomb friction , friction factor model

The friction factor , often referred to as m, is a measure of the friction between two bodies. It is dimensionless and lies between zero and one. In contrast to Coulomb friction , the forces caused by the friction are not proportional to the normal forces, but rather proportional to the flow stress k of the softer of the two friction partners.

${\displaystyle \tau =mk}$

If the stress on the contact surface reaches the yield stress, the resulting forces can no longer increase linearly. This is where the scope of the Coulomb model ends.

literature

• W. Dahl, R. Kopp, O, Pawelski (Ed.): Umformtechnik. Plastomechanics and materials science . Steel iron u. a., Düsseldorf a. a. 1993, ISBN 3-514-00402-1 .