摘要
The quasistatic nanoindentation process of a spherical indenter in a single crystal copper is investigated with the molecular statistical thermodynamics(MST)method based on the embedded atom method(EAM)potential.The indentation modulus obtained in the MST simulation is 129.9 GPa,which agrees well with the theoretical prediction(129GPa).In the elastic regime,the obtained maximum displacement of the indenter is two times the contact depth and the contact area is qualitatively proportional to the contact depth,which agrees well with Hertzian elastic theory of contact.The MST simulation can reproduce the nucleation of dislocation as well.Moreover,the efficiency of the MST method is about 8 times higher than that of traditional MD simulations.
作者
TAN Hao
WANG Hai-Ying
XIA Meng-Fen
KE Fu-Jiu
BAI Yi-Long
谭浩;汪海英;夏蒙棼;柯孚久;白以龙(State Key Laboratory of Nonlinear Mechanics(LNM),Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190;Graduate University of Chinese Academy of Sciences,Beijing 100049;School of Physics and Nuclear Energy Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191)
基金
Supported by the National Natural Science Foundation of China under Grant Nos 10932011,10772181,11021262,10732090 and 10772012
the National Basic Research Program of China under Grant No 2007CB814803.
