Abstract

The understanding of friction for the simple case of two surfaces contacting under the influence of a normal force is a complicated problem for which there is currently no definitive answer. In this paper a brief review of previous models is given and the similarity of the static and dynamic conditions of asperity interaction to those of the machining process is shown. A new model of the friction process based upon a three-zone model of machining is proposed and the effects of material, normal load and velocity calculated based upon machining information obtained at low feeds. The new theory of friction is able to predict approximate values of μ and to account for its change as a function of material and sliding velocity. It can also explain the change in μ that occurs when normal force conditions increase to cause interfacial seizure.

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