Abstract
When the lubricant film between the sliding bodies is thicker, the solid lubricant may show a quasi-hydrodynamic behaviour.It is assumed that the shearing force of lubricant film F is given as follows; where, U: the shearing speed, h: the thickness of lubricant film, A: the area of the film, υ, α: the constants depending on lubricants.Then a formula of quasi-hydrodynamic lubrication may be expressed as follows; where, fi: frictional force that acts on the unit length of fibre or yarn, Ri: load that acts on the unit length of fibre or yarn, c, N: constants.The formula is found to have a reasonable agreement with the experimental results.
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