Adhesive contact: from atomistic model to continuum model

doi:10.1088/1674-1056/20/4/043401

Abstract Two types of Lennard-Jones potential are widely used in modeling adhesive contacts. However, the relationships between the parameters of the two types of Lennard–Jones potential are not well defined. This paper employs a self-consistent method to derive the Lennard–Jones surface force law from the interatomic Lennard–Jones potential with emphasis on the relationships between the parameters. The effect of using correct parameters in the adhesion models is demonstrated in single sphere-flat contact via continuum models and an atomistic model. Furthermore, the adhesion hysteresis behaviour is investigated, and the S-shaped force-distance relation is revealed by the atomistic model. It shows that the adhesion hysteresis loop is generated by the jump-to-contact and jump-off-contact, which are illustrated by the S-shaped force-distance curve.

Keywords: Lennard–Jones potential adhesive contact atomistic model adhesion hysteresis

Received: 17 August 2010
Revised: 11 September 2010
Accepted manuscript online:

PACS:	34.20.Cf	(Interatomic potentials and forces)
	31.15.xv	(Molecular dynamics and other numerical methods)
	07.79.Lh	(Atomic force microscopes)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10476019) and the Fundamental Research Funds for the Central Universities of China (Grant No. JY10000904018).

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Fan Kang-Qi(樊康旗),Jia Jian-Yuan(贾建援), Zhu Ying-Min(朱应敏), and Zhang Xiu-Yan(张秀艳) Adhesive contact: from atomistic model to continuum model 2011 Chin. Phys. B 20 043401

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