CONNECTING MOLECULAR DYNAMICS AND DISLOCATION DYNAMICS TO CONTINUUM IN HIERARCHICAL SIMULATIONS OF MICROCRACKS IN SOLIDS(Special Issue on Hierarchical Estimations of Materials Strength)
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概要
- 論文の詳細を見る
Multiscale approach to crack tip plasticity involves length scales from electronic structure to the continuum, as well as deformation behavior from single dislocation nucleation to plastic-zone shielding. A current challenge is to connect the different levels and methods of simulation in order to study ductile fracture in a more holistic fashion, a goal that cannot be accomplished through any one single simulation. We present two specific examples of potentially useful connections, (1)using molecular dynamics to determine a stress-displacement relation for direct use in continuum-level analysis, and (2)a comparative study of dislocation microstructure evolution by discrete dislocation dynamics and finite-element method. Applications to understanding brittle-ductile behavior in an important metal, α-Fe, are particularly emphasized.
- 社団法人日本材料学会の論文
- 1999-12-15
著者
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KITAGAWA Hiroshi
Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University
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Nakatani Akihiro
Department of Biomolecular Science, Faculty of Engineering, Gifu University
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Yip Sidney
MIT
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Yip Sidney
Department Of Nuclear Engineering Massachusetts Institute Of Technology
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中谷 彰宏
大阪大学 大学院工学研究科 知能・機能創成工学専攻
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Nakatani Akihiro
Department Of Adaptive Machine Systems Graduate School Of Engineering Osaka University
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Nakatani Akihiro
Department Of Mechanical Engineering Faculty Of Engineering Osaka University
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Kitagawa Hiroshi
Department Of Adaptive Machine Systems Graduate School Of Engineering Osaka University
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Kitagawa Hiroshi
Department Of Adoptive Machine Systems Graduate School Of Engineering Osaka University
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