Molecule Statistical Thermodynamics Simulation of Nanoindentation of Single Crystal Copper with EAM Potential  

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)

机构地区：[1]State Key Laboratory of Nonlinear Mechanics(LNM),Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190 [2]Graduate University of Chinese Academy of Sciences,Beijing 100049 [3]School of Physics and Nuclear Energy Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191

出　　处：《Chinese Physics Letters》2011年第4期167-170,共4页中国物理快报（英文版）

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.

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.

关 键 词：COPPER THERMODYNAMICS CRYSTAL 

分 类 号：TG1[金属学及工艺—金属学]