Research on in-situ microscopic observation of dynamic contact and reciprocating sliding friction of GM-3 lining interface

This paper, based on the real-time in-situ observation of white box test, aims to investigate the micro-contact characteristics and the friction and wear mechanisms of the GM-3 lining material on the rubbing interface. The results show that the friction coefficient is positively correlated with the actual contact area at different contact pressures and sliding speeds. When the sliding speed reaches 5 mm/s, there is a phenomenon of stick-slip fluctuation with the friction noise. The process of dynamic viscoelastic friction can be divided into four stages. And when it is worn, the viscoelastic lining material is easy to produce reel-like debris.