A Study on the Mechanicla Behavior of Two Granites at Elevated Temperatures

고온하 화강암의 변형 및 파괴거동에 관한 연구

  • 장명환 (대한 광업진흥공사 기술연구소) ;
  • 양형식 (전남대학교 자원공학과)
  • Published : 1997.06.01

Abstract

When crystalline rocks are heated, thermal stress is induced by the differences in thermal expansion of the mineral composition and its orientation. In this study, high temperature uniaxial compressive tests were carried out for Iksan and Hwangdeung granites to study the deformation and failure behavior due to thermal loading. Compressive and tensile strength of Hwangdeung granite for 20$0^{\circ}C$ decreased to 80% and 82% of the room temperature strength, and those of Iksan granite decreased to 90% and 92% for 20$0^{\circ}C$, respectively. Elastic moduli of both granites were decreased sharply at the stress level of 80% of ultimate failure strength. Elastic moduli of both granites by variation of temperature at 50% of ultimate failure strength was decreased as almost linearly.

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References

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