Deformation and Fatigue Characteristics of Large Welded Bellows with Inclined External Edge

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To develop long-life welded bellows for use under different pressure conditions, that is, atmospheric pressure and a high vacuum applied to the inside and outside of the welded bellows, respectively, a deformation analysis of welded bellows (Hastelloy C-22, 460 mm in external diameter, 370 mm in internal diameter, 0.475 mm in thickness) is performed by elastoplastic finite element analysis. The simulation results are as follows. In a conventional welded bellows used in an external-vacuum and internal-atmospheric-pressure environment, the external straight portion forms a vertical opening due to the pressure difference. The opening angle decreases by forming a slope on the external straight portion. The stress amplitude that occurs during the compression of a conventional welded bellows reaches its maximum in the vicinity of the external weld. The maximum value also decreases by forming a slope on the external straight portion. Fatigue life testing is performed on bellows produced on the basis of the simulation results. It is confirmed by fatigue life testing that forming a slope on the external straight portion is effective for extending the life of the bellows.

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  • Materials transactions  

    Materials transactions 49(6), 1249-1255, 2008-06-01 

    The Japan Institute of Metals and Materials

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各種コード

  • NII論文ID(NAID)
    10021147264
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13459678
  • NDL 記事登録ID
    9519001
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  NDL  IR  J-STAGE 
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