Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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A Study on dynamic Fracturing Behavior of Anisotropic Granite by SHPB Test

스플릿 흡킨슨 바(SHPB)를 이용한 이방성 화강암의 동적파괴거동 연구

  • 최미진 (전남대학교 대학원 지구시스템공학과) ;
  • 조상호 (전북대학교 에너지자원공학과) ;
  • 양형식 (전남대학교 건설지구환경공학과)
  • Published : 2008.06.30
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Abstract

Dynamic fracturing of anisotropic granite was investigated by SHPB (Split Hopkinson Pressure Bar). Energy absorption during the test and maximum stress were increased as strain rate increased. Maximum stresses in every direction were dependent on the strain rate but not so sensitive to anisotropy. Elastic wave velocity was decreased as strain rate increased and dependent on strain rate in every direction. Especially, elastic wave velocity decreased more rapidly in a strong rock.

본 연구에서는 SHPB(Split Hopkinson Pressure Bar)를 이용하여 변형률 속도에 따른 이방성 화강암의 동적파괴 과정을 조사하였다. 실험결과 변형률 속도가 증가할수록 에너지 흡수량 및 최대응력이 증가하였다. 최대응력은 모든 방향에서 변형률 속도에 의존적이나 역학적 이방성에 민감하지는 않았다. 변형률 속도가 증가할수록 탄성파속도가 많이 감쇠되고, 모든 방향에서 변형률 속도에 의존적이며 강한 암석일수록 감쇠가 빠르게 일어났다.

Keywords

References

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