N.J. Wang , Y. Zhu and Y.X. Yao School of Mechanical and Electrical Engineering, Harbin Institute of Technology, China School of Mechanical and Automotive Engineering, Shenyang Institute of Aeronautical Engineering, China
<正>The process of diamond particle pressing into single crystal copper sample is simulated using molecular dynamics method. Three-dimension molecule dynamics model is founded. The acting force among atoms is described using Morse potential function. Verlet algorithm is employed to solve movement functions. Load fluctuation with the indentation depth of indenter in loading process is explained at atom scale. This paper analyzes the elastic recovery characteristics of single crystal copper nano-indentation and calculates the nano-hardness of single crystal copper under ideal conditions. At last, the size effect phenomena of nano-hardness is explained based on the study of the ratio between swelled parts around indentation boundary and entire indentation depth.
Nano-hardness; Molecular Dynamics; Nano-indentation; Single Crystal Copper
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