A fractal expansion of a three dimensional elastic-plastic multi-scale rough surface contact model

► Fractal model expansion to Jackson-Streator multi-scale model is presented. ► Full analytical solution is presented, both in elastic and in plastic range. ► In spite of the model's simplicity, it compares favourably with more complex models and calculations (Persson, Borri-Brunetto). ► Simple model structure makes it good candidate for future model extensions. ► E.g. an extension for transient friction effects is presented by the authors at 38th Leeds-Lyon Symposium.