Development of Efficient Instability Analysis Method for Atomic Structures Using Linear Elements and Its Application to Amorphous Metal

• SHIMADA Takahiro

  Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University

• OKAWA Satoru

  Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University

• MINAMI Shinichiro

  Mitsubishi Electric Corporation

• KITAMURA Takayuki

  Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University

抄録

For atomic-level investigation of plasticity in amorphous metal, instability analysis which can rigorously describe unstable deformation of atomic structures is a key technique. However, the analytical method cannot be applied to large-scale amorphous metal because of the enormously-increasing computational load with respect to the number of atoms. In this study, an efficient instability analysis method for a large-scale atomic system is proposed using linear elements, and it is applied to cracked amorphous metal under tension. The proposed method successfully evaluates the instability criterion as well as the highly-localized unstable deformation. Moreover, the computational efficiency is considerably improved from the original one, enabling us to address mechanical instability problems in amorphous metal consisting of a great number of atoms.

収録刊行物

• JSMME

  JSMME 3 (5), 807-818, 2009

  一般社団法人 日本機械学会

キーワード

• Unstable Deformation
• Atomic Structure
• Instability Analysis
• Linear Element
• Mesh Division
• Amorphous Metal
• Molecular Dynamics

詳細情報

• CRID: 1390282680242509056
• NII論文ID: 130000127290
• DOI: 10.1299/jmmp.3.807
• ISSN: 18809871
• Web Site: http://www.jstage.jst.go.jp/article/jmmp/3/5/3_5_807/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可