Abstract
A numerical method for analyzing the elastic contact mechanics due to Lennard-Jones (LJ) surface forces between a spherical slider and a flat disk is presented by taking account of roughness contact effect. First, neglecting the effect of attractive force at asperity contact, various features of elastic contact of 2-mm radius slider are presented in relation to the distance between mean roughness heights. It is revealed that the contact behaviors at a small mean roughness height distance can not be predicted either by JKR or DMT theory. A simple equation to evaluate LJ adhesion force after contact is presented. Next, contact characteristics of 1-μm radius sphere and disk are presented to examine how LJ attractive force at asperity contact can be evaluated. It is found that the adhesion force can be approximated by JKR or DMT theory if the surface energy can be related to Hamaker constant properly. Then, a simple equation to evaluate LJ attractive force at asperity contact is presented for the roughness contact analysis.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
