中国物理B ›› 2008, Vol. 17 ›› Issue (1): 259-263.doi: 10.1088/1674-1056/17/1/045

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Study of mechanical properties of amorphous copper with molecular dynamics simulation

王广海1, 潘晖1, 柯孚久2, 夏蒙棼3, 白以龙4   

  1. (1)Department of Physics, Beihang University, Beijing 100083, China; (2)Department of Physics, Beihang University, Beijing 100083, China;State Key Laboratory of Non-linear Mechanics (LNM), Institute of \\Mechanics, Chinese Academy of Sciences, Beijing 100080, China\; (3)State Key Laboratory of Non-linear Mechanics (LNM), Institute of \\Mechanics, Chinese Academy of Sciences, Beijing 100080, China;Department of Physics, Peking University, Beijing 100871, China ; (4)State Key Laboratory of Non-li
  • 出版日期:2008-01-20 发布日期:2008-01-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10528205, 10772012 and 10432050) and Chinese Academy of Sciences Innovation Program and KJCX2-YW-M04.

Study of mechanical properties of amorphous copper with molecular dynamics simulation

Wang Guang-Hai(王广海)a), Pan Hui(潘晖)a), Ke Fu-Jiu(柯孚久)a)b)†, Xia Meng-Fen(夏蒙棼)b)c), and Bai Yi-Long(白以龙)b)   

  1. a Department of Physics, Beihang University, Beijing 100083, China; b State Key Laboratory of Non-linear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China; c Department of Physics, Peking University, Beijing 100871, China
  • Online:2008-01-20 Published:2008-01-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10528205, 10772012 and 10432050) and Chinese Academy of Sciences Innovation Program and KJCX2-YW-M04.

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摘要： The formation and mechanical properties of amorphous copper are studied using molecular dynamics simulation. The simulations of tension and shearing show that more pronounced plasticity is found under shearing, compared to tension. Apparent strain hardening and strain rate effect are observed. Interestingly, the variations of number density of atoms during deformation indicate free volume creation, especially under higher strain rate. In particular, it is found that shear induced dilatation does appear in the amorphous metal.

关键词: molecular dynamics, amorphous, tension, shear, strain rate effect

Abstract: The formation and mechanical properties of amorphous copper are studied using molecular dynamics simulation. The simulations of tension and shearing show that more pronounced plasticity is found under shearing, compared to tension. Apparent strain hardening and strain rate effect are observed. Interestingly, the variations of number density of atoms during deformation indicate free volume creation, especially under higher strain rate. In particular, it is found that shear induced dilatation does appear in the amorphous metal.

Key words: molecular dynamics, amorphous, tension, shear, strain rate effect

中图分类号:  (Deformation and plasticity)

  • 62.20.F-
81.40.Lm (Deformation, plasticity, and creep) 61.43.Bn (Structural modeling: serial-addition models, computer simulation) 61.43.Dq (Amorphous semiconductors, metals, and alloys)