The Stiffness and Damping of Lubricated Joints Subject to Normal Loads
This paper reports the results of an experimental study carried out on a variety of joint surfaces to investigate the influence of introducing lubricant in between the joint interface. Joints having different surface topographies were tested. The viscosity of lubricant is shown to have a marKed effect upon both the dynamic stiffness and damping of joints. The mechanism of the action of the lubricant layer is discussed. It has been shown that the joint stiffness could be increased to almost the stiffness of its equivalent solid by introducing a layer of Hermetite. Moreover, a considerable gain in the interface layer damping is achieved.
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