花こう岩の異方弾性定数の評価法に関する研究

• 奈良 禎太

  北海道大学大学院　工学研究科

• 金子 勝比古

  北海道大学　工学研究科

書誌事項

タイトル別名

• Evaluation of The Elastic Constants of Granite
• 花崗岩の異方弾性定数の評価法に関する研究
• カコウガン ノ イホウ ダンセイ テイスウ ノ ヒョウカホウ ニ カンスル ケンキュウ

抄録

It is well known that granite has orthorhombic elasticity caused by the orientation distribution of the pre-existing microcracks. Measurements of P and S-wave velocities propagating in various directions are indispensable to determine these elastic constants, because the orthorhombic material has nine independent elastic constants.<BR>In this study, a new method to determine the elastic constants of granite is proposed. In this method, rock is assumed to be an elastic material which contains oriented cracks and random distributed cracks, and the effective elastic constants of rock are calculated by using New Self Consistent Scheme. From the calculated elastic constants, theoretical values of the elastic wave velocities are calculated and compared with measured values of them. The elastic constants can be back-analyzed by minimizing the difference between theoretical wave velocities and measured ones.<BR>The proposed method is applied to three kinds of granite. It is confirmed that the theoretical values of wave velocities agree well with the measured values, and that the elastic constants as well as the crack densities can be evaluated. Furthermore, it is pointed out that the elastic constants of granite can be evaluated by measuring P-wave velocities in three principal directions.

収録刊行物

• 資源と素材

  資源と素材 119 (6/7), 396-402, 2003

  一般社団法人 資源・素材学会

キーワード

• 花崗岩
• New Self Consistent Scheme
• 異方弾性定数
• 直交異方性
• クラック密度

詳細情報

• CRID: 1390282681027637120
• NII論文ID: 10011754030
• NII書誌ID: AN10062646
• DOI: 10.2473/shigentosozai.119.396
• ISSN: 18806244
• ISSN: 09161740
• NDL書誌ID: 6656654
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6656654
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可