Chinese Journal of Theoretical and Applied Mechani ›› 2017, Vol. 49 ›› Issue (5): 978-984.DOI: 10.6052/0459-1879-17-142

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SIZE EFFECT OF THE INTERFACE ENERGY DENSITY IN BI-NANO-SCALED-METALLIC PLATES

Wang Shuai1,4, Yao Yin2, Yang Yazheng2,3, Chen Shaohua2,3   

  1. 1 LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;
    2 Institute of Advanced Structure Technology, Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, China;
    3 Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing Institute of Technology, Beijing 100081, China;
    4 School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-04-28 Online:2017-09-15 Published:2017-09-27

Abstract:

The interface free energy density is an important quantity characterizing the mechanical property of interface in nanocomposite systems. In this paper, molecular dynamics simulation method is adopted to investigate the interface energy density of different FCC metallic bi-nano-scaled plates. The morphology of the interface crystal structure and the interface effect on the atomic potential are analyzed. It is found that interface atoms have periodically wrinkled rarefied or serried configurations, and the potential energy of interface atoms is also periodically distributed. The potential energy of atoms near the interface is obviously different from that of atoms inside the nano-plates. Both the Lagrange interface energy and the Eulerian one increase with the increase of the thickness of the bi-material, which approach the interface energy of a bulk bi-material finally.

Key words:

metallic bi-material interface|molecular dynamics|interface energy density|size effect|interface morphology

CLC Number: