2014年1月
OS1104 ナノ構造体に対する破壊力学の適用可能性に関する分子静力学解析
M&M材料力学カンファレンス
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- 巻
- 2014
- 号
- 開始ページ
- OS1104
- 終了ページ
- 1
- 記述言語
- 日本語
- 掲載種別
- 研究論文(学術雑誌)
- 出版者・発行元
- 一般社団法人日本機械学会
We investigated the applicability of fracture mechanics based on the continuum theory at the nanoscale, where only a small number of atoms are included in a singular stress field near a crack tip. We performed molecular statics simulations for pre-cracked nanoscale specimens with plate geometry. When the specimen width W is larger than 80 nm, the crack propagates at the stress intensity factor reaching fracture toughness K_<IC>. This indicates the fracture mechanics criterion successfully describes fracture at that scale. However, as the W is smaller than 40 nm, the stress intensity factor at the fracture clearly deviates from K_<IC>. This suggests that fracture mechanics loses its validity for the specimen smaller than 40 nm. Thus, identified the lower applicable limit of fracture mechanics is around W=40 nm.
- リンク情報
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- CiNii Articles
- http://ci.nii.ac.jp/naid/110009939595
- CiNii Books
- http://ci.nii.ac.jp/ncid/AA12322087
- URL
- http://ci.nii.ac.jp/naid/110009939595/
- ID情報
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- CiNii Articles ID : 110009939595
- CiNii Books ID : AA12322087