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

Chiharu Wada; Tetsuo Shoji; Hideaki Takahashi

doi:10.1299/kikaia.52.1082

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

Chiharu Wada, Tetsuo Shoji, Hideaki Takahashi

New Industry Creation Hatchery Center (NICHe)

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

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 K_ic(J) and the elastic modulus E. In order to interpret the K_ic(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	https://doi.org/10.1299/kikaia.52.1082
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

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title = "Fracture Toughness Evaluation of Granite in a High Temperature Pressurized Water Environment",

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.",

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T1 - Fracture Toughness Evaluation of Granite in a High Temperature Pressurized Water Environment

AU - Wada, Chiharu

AU - Shoji, Tetsuo

AU - Takahashi, Hideaki

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N2 - 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.

AB - 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.

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