Size and strain rate effects in tensile strength of penta-twinned Ag nanowires
作者: Xuan ZhangXiaoyan LiHuajian Gao
作者单位: 1Tsinghua University
2Brown University
刊名: Acta Mechanica Sinica, 2017, Vol.33 (4), pp.792-800
来源数据库: Springer Journal
DOI: 10.1007/s10409-017-0675-6
关键词: Penta-twinned nanowireSize effectStrain rate effectDislocation nucleationAtomistic simulation
英文摘要: Penta-twinned Ag nanowires (pt-AgNWs) have recently attracted much attention due to their interesting mechanical and physical properties. Here we perform large-scale atomistic simulations to investigate the influence of sample size and strain rate on the tensile strength of pt-AgNWs. The simulation results show an apparent size effect in that the nanowire strength (defined as the critical stress for dislocation nucleation) increases with decreasing wire diameter. To account for such size effect, a theoretical model involving the interaction between an emerging dislocation and the twin boundary has been developed for the surface nucleation of dislocations. It is shown that the model predictions are in quantitative agreement with the results from atomistic simulations and previous...
原始语种摘要: Penta-twinned Ag nanowires (pt-AgNWs) have recently attracted much attention due to their interesting mechanical and physical properties. Here we perform large-scale atomistic simulations to investigate the influence of sample size and strain rate on the tensile strength of pt-AgNWs. The simulation results show an apparent size effect in that the nanowire strength (defined as the critical stress for dislocation nucleation) increases with decreasing wire diameter. To account for such size effect, a theoretical model involving the interaction between an emerging dislocation and the twin boundary has been developed for the surface nucleation of dislocations. It is shown that the model predictions are in quantitative agreement with the results from atomistic simulations and previous...
全文获取路径: Springer  (合作)
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来源刊物:
影响因子:0.688 (2012)

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关键词翻译
关键词翻译
  • tensile 拉的
  • twinned 成双晶的
  • nucleation 成核
  • strength 强度
  • strain 应变
  • atomistic 原子论的
  • simulation 模拟
  • effect 效应
  • dislocation 断层
  • reveal 显露