船体構造におけるクラックアレスターの要求性能 Arrestability Requirement for Crack Arrestor in Hull Structure

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Prevention of large-scale brittle fracture inducing hull breakage is extremely important in order to secure the safety of vessels. Meanwhile classification societies specify the arrangement of grades E or EH steel plates as crack arrestor to critical hull structural members such as sheer strake, deck stringer etc. However, the clear arrestability requirement for the crack arrestor is not necessarily specified in the rules of the classification societies. <br> In this paper, the arrestability requirements for the crack arrestor, which intends for vessels under “normal operation” and “emergency situation” such as collision and stranding, are examined by fracture mechanics (K-concept) . Moreover based on the above examination, the first-ever crack arrestor concept to secure hull structural integrity under “emergency situation” is developed by the classification society. <br> Then this paper comes to the following conclusions:<br> (1) For vessels under “normal operation”, it is possible to arrest extremely long brittle crack where Kca value of crack arrestor plate at minimum service temperature (-10°C) secures 6000N⁄ mm<sup>1.5</sup>and over. <br> (2) For vessels under “emergency situation”, it is possible to arrest extremely long brittle crack where Kca value of crack arrestor plate with 10% plastic strain at minimum service temperature (-10°C) secures 6000N⁄mm<sup>1.5</sup> and over. <br> (3) As the first-ever crack arrestor concept corresponding to “emergency situation”, the classification society (ClassNK) developed the innovative institution to identify and register the vessels with Descriptive Note “H-ARST” which denotes applying the higher crack arrestor to the specific hull structural members.

収録刊行物

  • 圧力技術 = Pressure engineering : journal of Japan High Pressure Institute

    圧力技術 = Pressure engineering : journal of Japan High Pressure Institute 41(6), 303-315, 2003-11-25

    一般社団法人 日本高圧力技術協会

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各種コード

  • NII論文ID(NAID)
    10012512978
  • NII書誌ID(NCID)
    AN00011762
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03870154
  • NDL 記事登録ID
    6787631
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z17-750
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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