Abstract
We numerically investigated contact characteristics of a contact pad with rough disk surface and possibility of a contact/near-contact slider, using a single-DOF slider and random wavy surface model with random roughness. From the contact analysis, it was found that contact stiffness and other characteristics are determined by asperity contact until the contact pad penetrates into the upper standard deviation of asperity peak height and that the contact stiffness tends to approach a constant value as the pad penetrates into average asperity height because the macroscopic deformation becomes predominant. Using the above contact characteristics, we simulated the behavior of a single-DOF slider and showed design conditions of disk waviness which can satisfy the tracking ability and wear durability in terms of wear volume and wear depth. Finally, we investigated the effect of meniscus force on the contact characteristics and the slider vibration.
