Behavior of EHL Films in Cyclic Squeeze Motion

抄録

The behavior of elastohydrodynamic lubrication(EHL) films formed between an optical flat and a normally vibrating steel ball is examined by means of the duochromatic optical interferometry technique. The film entrapped between the ball and flat plate forms an envelope at the end of the loading process. The maximum height of the film, which depends on the non-Newtonian response of oils and the squeeze number, remains constant during the cycle. Under conditions of short strokes and high frequency, air bubbles produced in the unloading process result in the collapse of the entrapped EHL film.