Fracture Toughness Evaluation of Granite in a High Temperature Pressurized Water Environment

Chiharu Wada, Tetsuo Shoji, Hideaki Takahashi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Fracture toughness tests based on the R-curve method using the unloading compliance calibration technique were conducted under the condition of a simulated crustal environment of a geother-mal reservoir (confining pressure 18 MPa, maximum temperature~350°C). The results obtained indicate that a significant reduction of both the elastic modulus and fracture toughness was observed with increasing temperature, and a single linear relationship was obtained between the fracture toughness Kic(J) and the elastic modulus E. In order to interpret the Kic(J)-E relationship, a model was proposed using stress-strain-opening displacement at a crack tip based on the fracture process zone.

Original languageEnglish
Pages (from-to)1082-1088
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Issue number476
Publication statusPublished - 1986


  • Fracture
  • Fracture Toughness
  • Granite
  • High Temperature Pressurized Water
  • Initial Tangent Modulus
  • Process Zone
  • R-Curve
  • Stress-Strain-Opening Displacement
  • Unloading Compliance Method

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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