Contact of Rough Surfaces: An Incremental Model Accounting for Strain Gradient Plasticity

In the contact of rough surfaces, most patches are at scale micrometers, and thus, their deformation can be dominated by size-dependent plasticity. this paper, we propose a new strategy to analyze role strain gradient plasticity in response between realistic surface rigid plane, which modifies incremental model based on mechanism-based (MSGP) theory. For several different surfaces with topography measured experimentally, relations applied load real area derived simple but effective way. It is found that significantly increases level mean pressure. The hardening effect caused weakens somewhat as increases. Compared previous methods, present might more efficient wider application.