Article

Tribology Letters

, Volume 18, Issue 3, pp 315-330

Molecular dynamics studies of atomic-scale tribological characteristics for different sliding systems

  • Y.-R. JengAffiliated withDepartment of Mechanical Engineering, National Chung Cheng University Email author 
  • , P.-C. TsaiAffiliated withDepartment of Mechanical Engineering, National Chung Cheng University
  • , T.-H. FangAffiliated withSouthern Taiwan University of Technology

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Abstract

A slider-slab sliding model for hard-to-soft and soft-to-soft sliding systems with abrasive and non-abrasive wear conditions is used to investigate atomic-scale friction. The molecular dynamics simulation uses the Morse potential to calculate interatomic forces between atoms. Separation distance between the slider and the slab is changed to simulate repulsive and attractive interactive force fields exerted on interface between two sliding components. Effects of the interaction potential parameters on the sliding friction are investigated. The relationship of frictional force, normal force and temperature rise of the slider and the slab during sliding are established. Comparison of the hard-to-soft and the soft-to-soft sliding system are carried out and shows different tribological phenomena.

Keywords

molecular dynamics Morse potential friction abrasive wear