圧力技術
Online ISSN : 1347-9598
Print ISSN : 0387-0154
ISSN-L : 0387-0154
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49 巻, 5 号
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論文
  • 内圧作用下における非石綿ジョイントシートガスケット付き管フランジ締結体の応力解析と密封性能評価
    高木 愛夫, 大宮 祐也, 小林 隆志, 沢 俊行
    原稿種別: 論文
    2011 年 49 巻 5 号 p. 216-224
    発行日: 2011/09/25
    公開日: 2012/01/27
    DOIhttps://doi.org/10.11181/hpi.49.216
    ジャーナル フリー
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    Pipe flange connections with asbestos gasket and non-asbestos gasket subjected to internal pressure at room temperature are analyzed taking account of a hysteresis in stress-strain curve of the gasket using axisymmetric theory of elasticity and a three dimensional finite element method (FEM) . The contact gasket stress distributions, the hub stresses and the variations in axial bolt force are examined in each pipe flange connection with asbestos and non-asbestos gaskets. The characteristics of the connections are demonstrated between asbestos and non-asbestos gaskets. Moreover, the amount of leakage is estimated using the basic gasket property obtained from JIS B 2490 and the contact gasket stresses obtained from the axisymmetric theory of elasticity and FEM. The estimated results are compared with the experimental results obtained from the leakage tests, where the compressed sheet gaskets (CSG) are used. It is found that the differences in the contact gasket stress distributions between pipe flange connections with asbestos and non-asbestos gaskets are small. The sealing performance of the pipe flange connections with non-asbestos gasket is equivalent to that with asbestos gasket at room temperature.
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  • 摩擦圧接を用いた6191アルミニウム青銅スタッド継手の強度
    越智 秀, 川井 五作, 森川 勝吉, 櫻井 恵三, 一色 美博
    原稿種別: 論文
    2011 年 49 巻 5 号 p. 225-231
    発行日: 2011/09/25
    公開日: 2012/01/27
    DOIhttps://doi.org/10.11181/hpi.49.225
    ジャーナル フリー
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    Stud joints of C6191 aluminum bronze were friction welded and its joint strength was examined. A hardened stir zone formed at the weld interface and its width increased with a friction time. In the tensile testing, since all friction welded joints fractured in the plate side, friction weldability of C6191 stud joints was good. Contrary, arc stud welded joints fractured at the weld zone and there were blowholes. In the bending testing, friction welded joints were fractured near the weld zone at bending angle of about 5°. In the fatigue testing, friction welded joints fractured near the weld zone and the fatigue limits of joints were 90-115MPa.
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