Papers by Mir Abolfazl Mokhtari
Imam Hossein University, 2022
In this study, by using Molecular Dynamics (MD) simulations, the effect of adhesion on the remova... more In this study, by using Molecular Dynamics (MD) simulations, the effect of adhesion on the removal and separation of materials in the nano-scale has been studied numerically during the nano-scratching test. The virtual setup simulates the scratching of a flat substrate made of a single crystalline aluminum using a rigid conical indenter with a blunted spherical tip (radius of 20 nm) at four different scratching depths (i.e., 0, 3, 7, and 10 A) was studied. The classical Lenard-Jones interatomic potential is used to model and regulate the adhesion between the atoms of the indenter and the substrate, which change from 5% to 70% of the interatomic adhesion strength of aluminum atoms. This mimics the effect of the lubricant without modeling. Although the effect of adhesion has been consistently neglected in previous studies, it has been observed that in scratches with shallower depths, the adhesive will have a significant effect on friction and wear. It is worth noting that in this study, due to the effect of plasticity being the main mechanism of the wear, according to experimental observations, friction and wear have a linear relationship with each other.
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Papers by Mir Abolfazl Mokhtari