| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2008-03-16 |
| タイトル |
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|
タイトル |
A Multiscale Approach for Modeling Scale-Dependent Yield Stress in Polycrystalline Metals |
|
言語 |
en |
| 言語 |
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|
言語 |
eng |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
A: dislocations |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
B: crystal plasticity |
| キーワード |
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|
主題Scheme |
Other |
|
主題 |
B: polycrystalline material |
| キーワード |
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|
主題Scheme |
Other |
|
主題 |
B: constitutive behaviour |
| キーワード |
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主題Scheme |
Other |
|
主題 |
B: scale dependency |
| 資源タイプ |
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資源 |
http://purl.org/coar/resource_type/c_6501 |
|
タイプ |
journal article |
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 著者 |
Ohashi, Tetsuya
Kawamukai, Masato
ZBIB, Hussein
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| 抄録 |
|
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内容記述タイプ |
Abstract |
|
内容記述 |
Modeling of scale-dependent characteristics of mechanical properties of metal polycrystals is studied using both discrete dislocation dynamics and continuum crystal plasticity. The initial movements of dislocation arc emitted from a Frank-Read type dislocation source and bounded by surrounding grain boundaries are examined by dislocation dynamics analyses system and we find the minimum resolved shear stress for the FR source to emit at least one closed loop. When the grain size is large enough compared to the size of FR source, the minimum resolved shear stress levels off to a certain value, but when the grain size is close to the size of the FR source, the minimum resolved shear stress shows a sharp increase. These results are modeled into the expression of the critical resolved shear stress of slip systems and continuum mechanics based crystal plasticity analyses of six-grained polycrystal models are made. Results of the crystal plasticity analyses show a distinct increase of macro- and microscopic yield stress for specimens with smaller mean grain diameter. Scale-dependent characteristics of the yield stress and its relation to some control parameters are discussed. |
| 内容記述 |
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内容記述タイプ |
Other |
|
内容記述 |
NOTICE: This is the author's version of a work accepted for publication by Elsevier. Changes resulting from the publishing process, including peer review, editing, corrections, structual formatting and other quality control mechanisms , may not be reflected in this document. Changes may have been to this work since it was submitted for publication. |
| 書誌情報 |
International journal of plasticity
巻 23,
号 5,
p. 897-914,
発行日 2006-04
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| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
http://doi.org/10.1016/j.ijplas.2006.10.002 |
| フォーマット |
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内容記述タイプ |
Other |
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内容記述 |
application/pdf |
| 出版者 |
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出版者 |
Elsevier |
|
言語 |
en |
| 著者版フラグ |
|
|
言語 |
en |
|
値 |
author |
| 出版タイプ |
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|
出版タイプ |
AM |
|
出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
ijp23_897.pdf (548.4 kB)
