1 Analytical and numerical wear modeling of metallic interfaces: A statistical asperity approach A.G. Mamalis 1* , A.K. Vortselas 2 and C.N. Panagopoulos 3 1 Project Center for Nanotechnology and Advanced Engineering, NC“R Demokritos, Greece 2 Laboratory of Manufacturing Technology, National Technical University of Athens, Greece 3 Laboratory of Physical Metallurgy, National Technical University of Athens, Greece ABSTRACT The prediction of the wear rate based on fundamental material properties is to date an elusive goal, because of the nonlinearity of wear mechanisms, the stochastic nature of surface morphology and the multiscale nature of the phenomenon. The present work is applying a previously developed dual scale model, which addresses the above issues by employing single-asperity interactions in the microscale and the interaction between stochastic surface morphologies in the macroscale. The microscale model can be analytical, based on slip-line field theory, or semi- empirical, based on generalising the observed mechanisms, or numerical, based on the meshfree Smooth Particle Hydrodynamics method. The macroscale model transforms surface topography into a multivariate distribution of asperity parameters and maps the microscale model’s response; then it simulates the wear process via a Monte Carlo simulation, by querying the map and integrating over the interface to maintain a load - separation equilibrium. The multiscale model is applied to the case of abrasive and adhesive wear of mild steel, and the results corresponding to various analytical and numerical microscale models are compared. Keywords: abrasive wear; adhesive wear; wear mechanisms; statistical analysis; contact mechanics; dynamic modelling * Corresponding author: Technological Scientific Park “Lefkippos” Patriarhou Gregoriou & Neapoleos Str. 153 10 Ag. Paraskevi - Athens, Greece Tel+302106546637, mamalis@ims.demokritos.gr