Investigation of the adhesive and abrasive wear mechanisms at the atomic scale using molecular dynamic simulations

Author:

Ahmadi Joneidi Amir12,Shamshirsaz Mahnaz1ORCID,Taghvaeipour Afshin2

Affiliation:

1. New Technologies Research Center, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran

2. Department of Mechanical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran

Abstract

In this study, the effect of adhesion on material removal is numerically investigated at the nanoscale level. In this regard, Molecular Dynamics (MD) simulations are conducted to distinguish the contribution of adhesive and abrasive wear mechanisms during a scratching process in terms of the degree of interfacial adhesion and scratching depth. The numerical model simulates the scratching of a flat workpiece made of a single crystalline aluminum using a rigid conical indenter with a blunted spherical tip at four different indentation depths (i.e. 0, 3, 7, and 10 Å). The classical Leonard-Jones interatomic potential is used to mimic the degree of adhesion by varying the adhesion parameter between 5–70% of the aluminum bonding energy. It is shown that, at shallow scratching depths, the contribution of adhesive work to the frictional work is much larger than the ploughing work. On the contrary, the ratio of adhesive to ploughing work reduces by increasing the scratching depth.

Publisher

SAGE Publications

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Mechanisms of friction and wear reduction by nanosilver additives to base oil: Molecular dynamics simulation and experimental study;Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology;2023-08-30

2. Transient tribo-dynamic performance of journal bearings considering wear behavior during start-up;Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology;2023-07-10

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