書誌事項
- タイトル別名
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- Discontinuous Dynamics of Mode-I Crack Propagation in Single Crystals
- タンケッショウ ザイリョウ ニ オケル モード Ⅰ キレツ ノ ダンゾクテキ ナ シンテン ダイナミクス
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<p>Discontinuous propagation of a crack tip in heterogeneous media is characterized by a power-law distribution, but discontinuity of crack propagation in homogeneous media is still unclear. In this study, we investigate the discontinuous features of the mode-I crack propagation in single crystals by performing molecular dynamics simulations of uniaxial tensile deformation for a two-dimensional single crystal model with an open cleavage. Temporal dynamics of the crack propagation is extracted by locating the position of the crack tip in the model. In the simulations, discontinuous crack propagation, go-stop motions of crack propagation, has been observed. The displacement of the crack seems to follow an exponential distribution depending on the temperature rather than power-law distributions. The observation indicates that the discontinuous behavior is due to dislocation emissions; a crack propagation started by increasing of local stress due to external loading stops by decreasing of the stress due to dislocation emission from the crack tip. This picture directly provides an exponential distribution consistent with the observed statistical feature.</p>
収録刊行物
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- 材料
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材料 67 (2), 222-228, 2018
公益社団法人 日本材料学会
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詳細情報 詳細情報について
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- CRID
- 1390001205445548544
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- NII論文ID
- 130006386396
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- NII書誌ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL書誌ID
- 028854062
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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
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可