Effects of Strain Rate and Water Saturation on the Tensile Strength of Rocks

변형률 속도 및 수분포화가 암석의 인장강도에 미치는 영향

  • 정우진 ((주)우진엔지니어링 연구개발부)
  • Received : 2010.04.09
  • Accepted : 2010.04.22
  • Published : 2010.04.30

Abstract

Hopkinson's effect tests were carried out for various strain rates on three different types of rock in both saturated and dry states in order to examine the effects of strain rate and water saturation on tensile strength. The tensile strength increased with the increase of the strain rate not only in dry state but also in saturated state. It was also especially recognizable that the dynamic tensile strength of rock in the dry state was proportional to approximately a one-third multiple of strain rate no matter what the type of rock. It was found that water saturation decreased tensile strength in the dry state of sandstone and tuff, both with high porosity, but no significant difference could be recognized between the dry and the saturated states of granite, which has a low porosity of 0.49%.

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