Simulation of initiation and early propagation of creep-fatigue small cracks based on the model of random fracture resistance of grain boundaries.
Bibliographic Information
- Other Title
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- 粒界破壊抵抗分布モデルによるクリープ疲労微小き裂の発生と初期伝ぱのシミュレーション
- リュウカイ ハカイ テイコウ ブンプ モデル ニ ヨル クリープ ヒロウ ビシ
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Abstract
A stochastic model and a method of simulation of the initiation and the early propagation of creep-fatigue small cracks along grain boundaries were proposed. In the model, grain boundaries between two adjacent triple points were projected and linked on a straight line perpendicular to the applied stress axis, and their length was given as random variables of a normal distribution. The grain boundaries had their own fracture resistances, the magnitudes of which were given as uniform random numbers. The fracture resistance of each grain boundary decreased by a constant magnitude corresponding to the driving force of one fatigue cycle. When the resistance become zero or a negative value, the grain boundary was assumed to fracture and to yield an intergranular facet of small crack. Based on this model, a numerical calculation was done for a smooth specimen of 304 stainless steel subjected to the slow-fast strain cycle of 1%-total strain range at 923K in a vacuum. The result of simulation on crack density, cumulative probability of crack length, and crack propagation rates coincided with the experimental results.
Journal
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- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
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TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 54 (503), 1312-1316, 1988
The Japan Society of Mechanical Engineers
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Details 詳細情報について
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- CRID
- 1390001204478086528
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- NII Article ID
- 110002373676
- 10004537067
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- NII Book ID
- AN0018742X
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- ISSN
- 18848338
- 03875008
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- NDL BIB ID
- 3190162
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed