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Simulation for intergranular stress corrosion cracking based on a three-dimensional polycrystalline model

三次元多結晶モデルに基づく粒界応力腐食割れのシミュレーション

釜谷 昌幸*; 板倉 充洋  

Kamaya, Masayuki*; Itakura, Mitsuhiro

応力腐食割れの解析においては亀裂発生と亀裂進展の二つの段階において異なる解析手法が必要となるが、初期の段階では既にある亀裂の周囲に新たな亀裂が発生しやすく、これは亀裂進展ともみなせるので区別が明確ではない。このような発生による亀裂の成長がどの程度の割合を占めるかをモンテカルロシミュレーションで調べて実験との比較を行った。その結果初期の段階ではその寄与が大きいことが判明した。

In stress corrosion cracking of stainless steel, two different schemes of analysis of crack growth should be employed for the crack initiation phase and crack growth phase. However, this distinction is not clear-cut in the crack initiation phase, because initiation of crack tends to occur at the tip of a pre-existing crack and it can be regarded as crackgrowth. The contribution of this type of initiation dominant growth to crack growth was evaluated by a Monte Carlo simulation, and it was shown that the contribution of IDG to crack growth was large for small cracks.

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パーセンタイル:77.85

分野:Mechanics

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