破壊力学による高圧自緊容器の構造健全性保証

• 陳 〓

• 小林 英男

• 中村 春夫

• 朴 位坤

書誌事項

タイトル別名

• Assessment of Structural Integrity of High-Pressure Autofrettaged Vessel by Fracture Mechanics.
• ハカイ リキガク ニ ヨル コウアツ ジキン ヨウキ ノ コウゾウ ケンゼンセ

抄録

To assess the structural integrity of high-pressure autofrettaged vessels, systematic sensitivity analysis was conducted for fatigue crack growth life N_f from an initial defect. The factors with the greatest influence on N_f are the autofrettage radius (i.e., compressive residual stresses) and initial defect size. Each contribution was clarified quantitatively. Fracture toughness K_IC of the material and occurrence of partial crack closure due to compressive residual stress have no marked effect on N_f. However, increase in K_IC increases the critical defect size which promotes integrity through high detectability of the defect during in-service inspection. N_f for a semielliptical crack (aspect ratio = 1/6) is about 60%∼70% that for a straight crack. The latter assumption is relatively useful considering its simplicity. The concept of "leak before break" does not hold for this particular type of vessel. However, as N_f is very large compared to the assumed size of the allowable defect described in ASME Boiler and Pressure Vessel Code, Sec. XI, structural integrity is satisfactorily assured.

収録刊行物

• 日本機械学会論文集Ａ編

  日本機械学会論文集Ａ編 60 (576), 1793-1799, 1994

  一般社団法人 日本機械学会

キーワード

• Structural Reliability
• Fracture Mechanics
• Residual Stress
• Fatigue
• Crack Propagation
• Autofrettage
• Pressure Vessel

詳細情報

• CRID: 1390282679423071488
• NII論文ID: 110002371950
• NII論文ID: 10003348851
• NII書誌ID: AN0018742X
• DOI: 10.1299/kikaia.60.1793
• ISSN: 18848338
• ISSN: 03875008
• NDL書誌ID: 3887604
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3887604
• Web Site: http://www.jstage.jst.go.jp/article/kikaia1979/60/576/60_576_1793/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可