EFFECTS OF THE AMOUNT OF LUBRICANT ON FRICTIONAL BEHAVIOUR OF FIBRE

(I) EFFECTS OF AMOUNT OF LUBRICANT ON THE FRICTION AT VARIOUS SLIDING SPEEDS

Abstract

The friction of fibres with the different amount of lubricant has been studied.
(1) When a liquid lubricant is applyied the effects of the increased amount of lubricant on the friction of fibre can be classified into the following three types:
1) simple increase 2) the increased and then decreased 3) simple decrease
(2) When the amount of the lubricant decreases, the friction changes from constant to increased value at a specific amount of lubricant. This amount is large in higher sliding speed. This phenomena can be explained qualitatively by the theory of hydrodynamic lubrication of fibres.
(3) When liquid lubricant is applied the decreased friction due to the decreased amount of lubricant is accountable by slip of lubricant.