ナノスケール複合材料中の格子欠陥力学場解析

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Author: 下川, 智嗣ほか

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Publication date: 2015-06-17

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Note (General)：: 金沢大学理工研究域機械工学系ナノスケール複合材料中の格子欠陥の非線形力学場を準連続体法と原子モデルを用いて検討した．まず，転位の力学場を解析解を用いずに表現できる準連続体法の開発を行った．それを用いて転位の自己エネルギーの粒径依存性と粒界の剛性率の関係を弾性論的に検討した．つぎに，原子モデルを用いて...

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https://kaken.nii.ac.jp/search/?qm=40361977

https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24560091/

https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-24560091/24560091seika/

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Material Type: 文書・図像類
Title: ナノスケール複合材料中の格子欠陥力学場解析
Author/Editor: 下川, 智嗣
Simokawa, Tomotsugu
Author Heading: 下川, 智嗣
Simokawa, Tomotsugu
Publication Date: 2015-06-17
Publication Date (W3CDTF): 2015-06-17
Alternative Title: Mechanical field analysis of lattice defects in nanoscale composite materials
Periodical title: 平成26(2014)年度科学研究費補助金基盤研究(C) 研究成果報告書 = 2014 Fiscal Year Final Research Report
No. or year of volume/issue: 2012-04-01 - 2015-03-31
Volume: 2012-04-01 - 2015-03-31
Pages: 6p.-
Text Language Code: jpn
Subject Heading: 格子欠陥
計算力学
準連続体法
転位
粒界
原子シミュレーション
複合材料
Target Audience: 一般
Note (General): 金沢大学理工研究域機械工学系
ナノスケール複合材料中の格子欠陥の非線形力学場を準連続体法と原子モデルを用いて検討した．まず，転位の力学場を解析解を用いずに表現できる準連続体法の開発を行った．それを用いて転位の自己エネルギーの粒径依存性と粒界の剛性率の関係を弾性論的に検討した．つぎに，原子モデルを用いて，粒界構造を直接表現し，粒界内の原子移動が格子転位の力学場を遮蔽できることが明らかになった．さらに，異相界面の結合力の強さが積層構造体の力学特性に与える影響を検討し，界面に侵入した格子転位の芯構造の分解は界面結合力に強く影響を受け，結果的に積層構造体の延性特性に対して界面結合力は重要な設計因子であることを見出した．
Non-linear mechanical fields around lattice defects in nano-scale composite materials was investigated by using the quasicontinuum (QC) and atomic simulations. First, the relationship between the grain size dependence of dislocation self-energy and the shear modulus of grain boundary (GB) regions was examined based on an elastic approach by the newly developed QC model. Next, GB structures were directly expressed by using atomic models and it was found that atomic shuffling in GB regions could shield the mechanical field caused by lattice dislocations. Furthermore, the influence of hetero-interface strength on the mechanical properties of multilayered composites was investigated by using atomic simulations. The decomposition of the lattice dislocation core structure at the hetero-interface is strongly affected by the interface strength; hence, the hetero-interface strength is one of the important factors to design an excellent material with high strength and high ductility.
研究課題/領域番号:24560091, 研究期間(年度):2012-04-01 - 2015-03-31
DOI: 10.24517/00052691
Source: https://kanazawa-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=46359&item_no=1&attribute_id=26&file_no=1
https://kanazawa-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=46359&item_no=1&attribute_id=26&file_no=1
Access Restrictions: 限定公開
Rights (production): CC BY-NC-ND
Related Material: https://kaken.nii.ac.jp/search/?qm=40361977
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24560091/
https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-24560091/24560091seika/
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 金沢大学 : 金沢大学学術情報リポジトリKURA