き裂先端湿潤環境下の岩石の破壊靱性評価 Evaluation of Fracture Toughness of Rocks in Wet and Chemical Condition

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著者

    • 歌川 学 UTAGAWA Manabu
    • 資源環境技術総合研究所安全工学部構造安全研究室 Safety Engineering Division, National Institute for Resources and Environment, MITI
    • 瀬戸 政宏 SETO Masahiro
    • 資源環境技術総合研究所安全工学部構造安全研究室 Safety Engineering Division, National Institute for Resources and Environment, MITI

抄録

Three point bending tests were conducted to investigate the effect of the chemical and wet environments on the fracture toughness of Inada granite, Kimachi sandstone, and Shin-Komatsu andesite. The new testing method was also suggested here so that the chemical solution or water constantly can exist at the crack tip during the tests. The fracture toughness was evaluated by both ISRM suggested method and AE (Acoustic Emission) technique. In AE technique AE hypocenter distribution was determined to pinpoint the crack front and process zone, then stress intensity factor was calculated using the crack length evaluated by AE hypocenters distribution. Fracture toughness of the granite, in which significant decrease has not been reported before even in wet condition, dropped 25 % in wet condition when compared to the one in dry condition, and also 37 % down in Kimachi sandstone. In Shin-Komatsu andesite, fracture toughness in wet or chemical condition dropped about 10 % from dry condition. It was found that the form of crack, estimated by AE hypocenters, have two patterns in Inada Granite. But in other rocks, there are only one pattern infracture loading. The AE behaviors in wet condition implies that the fracture mechanism could be changed from brittle manner to possibly ductile one.

収録刊行物

  • 資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan  

    資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan 114(12), p.856-861, 1998-11 

    The Mining and Materials Processing Institute of Japan

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各種コード

  • NII論文ID(NAID)
    10002468595
  • NII書誌ID(NCID)
    AN10062646
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09161740
  • NDL 記事登録ID
    4614121
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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