... method integrating micro-characteristics for precise control of contact performance. Design/methodology/approach A cam curve is established via high-order differential interpolation combined with the W-M fractal function to characterize surface roughness. A modified micro-contact model is developed...

... scales are interrelated rather than independent. For elastoplastic contact, a spring-damper model and an elastic deformation ratio function were proposed to calculate the contact stiffness of asperities. Findings A revised fractal asperity model was proposed to calculate the contact stiffness...

...Yuankai Zhou; Xue Zuo; Hua Zhu Purpose Running-in is a transient process prior to steady state and of great importance for mechanical performance. To reveal the fractal behavior in the running-in process, the steel-on-steel friction and wear tests were performed. Design/methodology/approach...