検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Importance of fracture criterion and crack tip material characterization in probabilistic fracture mechanics analysis of an RPV under a pressurized thermal shock

加圧熱衝撃を受ける原子炉容器の確率論的破壊力学解析における破壊基準とき裂先端材料特性評価の重要性

柴田 勝之; 鬼沢 邦雄; Li, Y.*; 加藤 大輔*

Shibata, Katsuyuki; Onizawa, Kunio; Li, Y.*; Kato, Daisuke*

PFMコードPASCALを使用し、原子炉容器の破損確率解析における破壊基準とき裂先端の破壊靱性評価の重要性について明らかにした。本論文では、PASCALに導入した弾塑性破壊評価基準並びに弾塑性破壊基準適用に際して必要な国産材及び米国材の標準J積分抵抗曲線データベースの作成について述べる。さらに、弾塑性破壊基準の効果に関するケーススタディを行った結果、弾塑性破壊基準及びき裂先端の破壊靱性評価方法は破損確率に顕著な影響を及ぼすことがわかった。

The paper describes the procedure to evaluate the ductile crack extension, where an increase in fracture resistance by a ductile crack extension is considered. Two standard ${it J}$-resistance curves are prepared for applying the elasto-plastic fracture criterion. Case studies concerning the effect of elasto-plastic fracture criterion were carried out using a severe PTS transient. The introduction of the elasto-plastic fracture criterion significantly contributes to remove the over-conservatism in applying the linear elastic fracture criterion. It was also found that the algorithm of the re-evaluation of crack tip characterization also has a significant effect on the failure probability.

Access

:

- Accesses

InCites™

:

パーセンタイル:61.86

分野:Engineering, Multidisciplinary

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.