書誌事項
- タイトル別名
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- Investigation of the origins of Bauschinger effect in polycrystalline metals
説明
<p>In this study, we investigated origins of Bauschinger effect in polycrystalline metals using a finite element method incorporating a higher-order gradient crystal plasticity theory in which it is possible to impose microscopic (extra) boundary conditions. In a boundary value problem of polycrystalline metals, we focus on two types of material defect, i.e. grain boundaries and heterogeneous dislocation structure, as origins of Bauschinger effect. When grain boundaries are assumed to be hard interfaces being impenetrable for dislocations without taking account of heterogeneous dislocation structure, a strong Bauschinger effect appears with refinement of the grain size. When grain boundaries are assumed to have the same property as that of the bulk part of the material, only a weak Bauschinger effect is observed. On the other hand, with a heterogeneous dislocation structure, the Bauschinger effect appears without assuming any special property for grain boundaries and dependency of the grain size on the amount of Bauschinger effect is small. The effect of heterogeneous dislocation structure cannot be neglected to account for the Bauschinger effect, and the grain boundaries may not play a role of strong barriers to dislocation movement.</p>
収録刊行物
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- 計算力学講演会講演論文集
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計算力学講演会講演論文集 2018.31 (0), 064-, 2018
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390282763117797376
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- NII論文ID
- 130007653499
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- ISSN
- 24242799
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可