Abstract
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 language | English |
---|---|
Pages (from-to) | 1082-1088 |
Number of pages | 7 |
Journal | Transactions of the Japan Society of Mechanical Engineers Series A |
Volume | 52 |
Issue number | 476 |
DOIs | |
Publication status | Published - 1986 |
Keywords
- 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