圧縮変形におけるグリフィス軌跡

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タイトル別名
  • Griffith Locus in Compression
  • アッシュク ヘンケイ ニ オケル グリフィス キセキ

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説明

In this paper the compressive deformation of an elastic solid in which contains a penny-shaped crack is considered in order to explain the brittle fracture of rocks. The complete stress-strain curve derived here consists of a linear proportional part with effective Young's modulus and fracture locus or so-called Griffith locus. The cross point of the former and the later gives a starting point of crack dislocation which is determined from Griffith's criterion.<BR>Griffith locus expressed in equations (24) or (28) corresponding respectively to uniaxial and triaxial compression shows following features.<BR>(1) It is a continuous curve whose slope is positive in a part and is negative in other.<BR>(2) It varies with confining pressure, while depends on intrinsic physical constants of solid and geometric parameters of crack.<BR>(3) If the initial crack size is smaller than a critical value, given in equation (29) in uniaxial compression, the elastic body may sustrain unstable fracture.

収録刊行物

  • 日本鑛業會誌

    日本鑛業會誌 92 (1060), 409-414, 1976

    一般社団法人 資源・素材学会

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