Deformation and Fatigue Characteristics of Large Welded Bellows with Inclined External Edge
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- Nagamachi Takuo
- Department of Mechanical Engineering, Tokushima University
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- Mishiba Takashi
- MIRAPRO Corporation
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- Katsuki Katsuhiro
- MIRAPRO Corporation
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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.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 49 (6), 1249-1255, 2008
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390001204249428096
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- NII論文ID
- 10021147264
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 9519001
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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