アモルファス金属中のき裂開口挙動の解析(原子モデルと弾粘塑性連続体モデルとの比較) Analysis of Crack Opening Behavior in Amorphous Metal (Comparative Study of Atomistic and ELasto-Viscoplastic Continuum Model)

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A large-scale molecular dynamics simulation on an atomistic model and an elasto-viscoplastic finite element analysis on a continuum model are carried out to study deformation field near a crack tip in amorphous metal. The atomistic model, in which Finnis-Sinclair type potential for iron is assumed as interatomic potential, is generated using heating-quenching simulation. The parameters in strain-dependent elasto-viscoplastic constitutive law for the continuum model are determined using a uni-axial tensile test for the atomistic model of amorphous metal. The results for the crack problem using the atomistic model and the continuum model are compared each other. The shape of crack front, strain distribution and stress distribution around the crack tip, increase of crack tip opening displacement and crack growth are examined, and FE results for the continuum model agree with MD results for the atomistic model. However, the continuum model can depict only averaged description of the atomistic model. In the atomistic model, it is observed that the highly deformed region consists of atomistically localized deformation. The atomistic simulation is indispensable to reveal the microscopic structures and deformation mechanisms.

収録刊行物

  • 日本機械学会論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A

    日本機械学会論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A 69(683), 1074-1081, 2003-07-25

    一般社団法人日本機械学会

参考文献:  16件中 1-16件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    110002370414
  • NII書誌ID(NCID)
    AN0018742X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03875008
  • NDL 記事登録ID
    6653568
  • NDL 雑誌分類
    ZM16(科学技術--科学技術一般--工業材料・材料試験)
  • NDL 請求記号
    Z14-737
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  J-STAGE 
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