Coulomb friction


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Related to Coulomb friction: Coulomb force, Coulomb energy, Viscous friction

Coulomb friction

[′kü‚läm ‚frik·shən]
(mechanics)
Friction occurring between dry surfaces.
References in periodicals archive ?
In the case of systems with Coulomb friction models, transition from slip to stick may occur when relative velocity [??] vanishes in a contact point.
The reason for introducing [[epsilon].sub.f] in (5) is because the classical Coulomb friction model only defines the maximum static friction for the stick state; the actual static friction force can take on any value in the interval between zero and [f.sub.[sigma]][[mu].sub.s], depending on the magnitude of the total nonfrictional external force.
And the following linear friction model, which includes viscous and Coulomb friction only, is unable to capture the complex dynamical friction behavior.
In simulation 2, it becomes evident that the inclusion of the static and Coulomb friction components in the valve dynamics reduces the standard predictive controller effectiveness.
[F.sub.c] is the coulomb friction sliding force and [nu] = [theta] is the sliding speed (velocity)
Feeny, "A nonsmooth Coulomb friction oscillator," Physica D: Nonlinear Phenomena, vol.
Additionally, existing work on the friction model adopted the Coulomb friction model in the inner race contacts, which could reflect the behavior of stick-slip but did not consider the rate-dependency friction in boundary lubrication and the friction in the contacts of the outer race.
The friction coefficient between the concrete and steel was modeled using coulomb friction contact.
Results show that for a given type of flow, runout is controlled by a constant stress condition and not by a constant slope condition, as assumed by the Coulomb friction model.
In addition, the Coulomb friction coefficient was computed; in this study, the friction coefficient was determined as the ratio of the maximum frictional force to the normal force after each cycle.
The values of static and Coulomb friction of rolling elements of the feed drive system are often approximately equal.