A study on the estimation of fracture toughness of granite by acoustic emission

미소 파괴음 빈도 측정에 의한 화강암의 파괴인성 평가에 관한 연구

  • 신재근 ((주)바우 컨설턴트 지반/터널부) ;
  • 이상은 (만영 엔지니어링) ;
  • 임한욱 (강원대학교 지구시스템공학과)
  • Published : 2000.06.01

Abstract

The fracture toughness can be measured by the two testing methods using chevron-notched specimen according to the ISRM Working Group of Commission of Testing Methods. They are chevron bend (CB) test and short rod (SR) test. In this study, the suggested methods (Level I tests) were conducted on the CB and SR specimens of Chuncheon granite. In addition. the J-integral analysis was combined with an acoustic emission technique to determine the fracture toughness. The results from two telling methods were analyzed in terms of the anisotropy and the acoustic emission characteristics.

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