On the Friction Theory of Solids with Flat Contact Surface

The effect of the way of applying inclined external force pressing the bodies of translational friction pair with flat contact surface is analyzed based on theoretical and experimental research of the external friction processes. The relationship between the inclined external force and the contact stress considering external zone of the friction pair is analyzed. The conditions when it is necessary to consider the influence of external zone of friction pair, are determined. The reduced coefficient of friction based on the relationship between coefficient of sliding friction and the function of additional resistance to the relative displacement of the bodies of the friction pair is researched. It is shown that this resistance is caused by the external zone.