Lowest Fatigue Limit Estimation of Ductile Cast Iron Joints by Considering Maximum Defect Size Toward Replacing Welded Joints

• Hidaka Tetsuro

  Research and Development Center, HINODE, Ltd.

• Noda Nao-Aki

  Dept. of Mechanical and Control Engineering, Kyusyu Institute of Technology

• Sano Yoshikazu

  Dept. of Mechanical and Control Engineering, Kyusyu Institute of Technology

• Kai Nobuhiro

  Research and Development Center, HINODE, Ltd.

• Fujimoto Hiroyoshi

  Research and Development Center, HINODE, Ltd.

抄録

In our earlier study, the authors revealed that the fatigue limit of ductile cast iron (DCI) specimens whose shapes are similar to the welded joint shapes is about three times larger than that of the welded joint specimens. However, since many defects are usually included in the DCI specimens, the fatigue limit of DCI joints decreases with increasing the maximum defect size. In this paper, therefore, the maximum defect size is estimated by using statistics of extremes. Then, the lowest fatigue limit corresponding to the maximum defect size is estimated from the 4 parameter model and compared with the lowest fatigue limit of the welded joint. As a result, it was confirmed that the lowest fatigue limit of the DCI specimens is about twice as large as the welded joint.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 60 (5), 1006-1015, 2020-05-15

  一般社団法人 日本鉄鋼協会

キーワード

• fatigue strength
• ductile cast iron
• welded joint
• statistics of extremes
• 4 parameter model
• √<i>area</i> parameter model

詳細情報

• CRID: 1390566775134702336
• NII論文ID: 130007843490
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.isijint-2019-494
• ISSN: 13475460
• ISSN: 09151559
• HANDLE: 10228/00007837
• Web Site: https://kyutech.repo.nii.ac.jp/records/6629
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/60/5/60_ISIJINT-2019-494/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可