分子動力学法援用による破壊記述パラメータ

• 井上 秀行

• 赤星 保浩

• 原田 昭治

書誌事項

タイトル別名

• Evaluation of MD-Aided Parameter in Fracture Mechanics.
• ブンシ ドウリキガクホウ エンヨウ ニ ヨル ハカイ キジュツ パラメータ

抄録

A molecular dynamics parameter (MDP), which J-integral is expanded to, is proposed for a molecular dynamics (MD) fracture simulation and is applied to a two-dimensional α-iron problem under simple tension. For this model a pair potential described by a polynomial expression is chosen as an interatomic potential. Closely packed lattice structures are assumed in the present calculation. The edge crack arranged in the middle of the analysis body is perpendicular to the tensile loading direction. The brittle fracture is analyzed under the fixed displacement boundary condition in the tensile deformation process. MDP₁ is calculated on several paths similarly to J-integral. MDP₁ increases slowly before fracture and decreases steeply after that in any path. In order to investigate the validity of MDP₁ the critical stress intensity factor K^MDP_IC is calculated. K^MDP_IC corresponds well with the decelis and Mullins K_IC. MDP value can be applied to an estimation of the initial stage of macroscopic fracture phenomenon with high reliability.

収録刊行物

• 日本機械学会論文集Ａ編

  日本機械学会論文集Ａ編 60 (578), 2236-2241, 1994

  一般社団法人 日本機械学会

キーワード

• Molecular Dynamics
• Fracture Mechanics
• α-Iron
• Crack Propagation
• J-integral
• Griffith's Crack
• Fracture Toughness
• Stress Intensity Factor

詳細情報

• CRID: 1390282679424236160
• NII論文ID: 110002372016
• NII論文ID: 10003820135
• NII書誌ID: AN0018742X
• DOI: 10.1299/kikaia.60.2236
• ISSN: 18848338
• ISSN: 03875008
• NDL書誌ID: 3900397
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3900397
• Web Site: http://www.jstage.jst.go.jp/article/kikaia1979/60/578/60_578_2236/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可