Modified PTS test and clump modeling on mixed mode crack growth in granite

J. S. Lee, John M Kemeny, T. Y. Ko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper describes the development of a new test for measuring the mode II fracture toughness for rock, KIIC. The test is called the Modified Punch Through Shear test (MPTS), which is a modification of the PTS test developed by [4]. Laboratory MPTS tests on Columbia granite were conducted. The lab tests and finite element modeling reveal that a valid shear crack is produced. Tests conducted at different confining stresses show that the shear cracking strength is a function of confining stress. Tests at each confinement were repeated 7 times, and even though the scatter in the results is large, best-fit results for shear cracking strength as a function of confining stress were determined. PFC modeling has also been conducted to simulate in detail the development of tensile and shear cracks in the MPTS test. A clump model rather than the standard Circular Particle Interaction (CPI) model was used to improve the strength envelope.

Original languageEnglish (US)
Title of host publicationProceedings of the 41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics
StatePublished - 2006
Event41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics - Golden, CO, United States
Duration: Jun 17 2006Jun 21 2006

Other

Other41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics
CountryUnited States
CityGolden, CO
Period6/17/066/21/06

Fingerprint

granite
clumps
Crack propagation
crack
cracks
modeling
Cracks
shear
shear test
Particle interactions
punches
Fracture toughness
confining
Rocks
fracture toughness
test
Columbia (Orbiter)
particle interactions
fracture strength
envelopes

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Lee, J. S., Kemeny, J. M., & Ko, T. Y. (2006). Modified PTS test and clump modeling on mixed mode crack growth in granite. In Proceedings of the 41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics

Modified PTS test and clump modeling on mixed mode crack growth in granite. / Lee, J. S.; Kemeny, John M; Ko, T. Y.

Proceedings of the 41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics. 2006.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lee, JS, Kemeny, JM & Ko, TY 2006, Modified PTS test and clump modeling on mixed mode crack growth in granite. in Proceedings of the 41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics. 41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics, Golden, CO, United States, 6/17/06.
Lee JS, Kemeny JM, Ko TY. Modified PTS test and clump modeling on mixed mode crack growth in granite. In Proceedings of the 41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics. 2006
Lee, J. S. ; Kemeny, John M ; Ko, T. Y. / Modified PTS test and clump modeling on mixed mode crack growth in granite. Proceedings of the 41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics. 2006.
@inproceedings{f1968c3e607749c7be3ede915792e4cf,
title = "Modified PTS test and clump modeling on mixed mode crack growth in granite",
abstract = "This paper describes the development of a new test for measuring the mode II fracture toughness for rock, KIIC. The test is called the Modified Punch Through Shear test (MPTS), which is a modification of the PTS test developed by [4]. Laboratory MPTS tests on Columbia granite were conducted. The lab tests and finite element modeling reveal that a valid shear crack is produced. Tests conducted at different confining stresses show that the shear cracking strength is a function of confining stress. Tests at each confinement were repeated 7 times, and even though the scatter in the results is large, best-fit results for shear cracking strength as a function of confining stress were determined. PFC modeling has also been conducted to simulate in detail the development of tensile and shear cracks in the MPTS test. A clump model rather than the standard Circular Particle Interaction (CPI) model was used to improve the strength envelope.",
author = "Lee, {J. S.} and Kemeny, {John M} and Ko, {T. Y.}",
year = "2006",
language = "English (US)",
booktitle = "Proceedings of the 41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics",

}

TY - GEN

T1 - Modified PTS test and clump modeling on mixed mode crack growth in granite

AU - Lee, J. S.

AU - Kemeny, John M

AU - Ko, T. Y.

PY - 2006

Y1 - 2006

N2 - This paper describes the development of a new test for measuring the mode II fracture toughness for rock, KIIC. The test is called the Modified Punch Through Shear test (MPTS), which is a modification of the PTS test developed by [4]. Laboratory MPTS tests on Columbia granite were conducted. The lab tests and finite element modeling reveal that a valid shear crack is produced. Tests conducted at different confining stresses show that the shear cracking strength is a function of confining stress. Tests at each confinement were repeated 7 times, and even though the scatter in the results is large, best-fit results for shear cracking strength as a function of confining stress were determined. PFC modeling has also been conducted to simulate in detail the development of tensile and shear cracks in the MPTS test. A clump model rather than the standard Circular Particle Interaction (CPI) model was used to improve the strength envelope.

AB - This paper describes the development of a new test for measuring the mode II fracture toughness for rock, KIIC. The test is called the Modified Punch Through Shear test (MPTS), which is a modification of the PTS test developed by [4]. Laboratory MPTS tests on Columbia granite were conducted. The lab tests and finite element modeling reveal that a valid shear crack is produced. Tests conducted at different confining stresses show that the shear cracking strength is a function of confining stress. Tests at each confinement were repeated 7 times, and even though the scatter in the results is large, best-fit results for shear cracking strength as a function of confining stress were determined. PFC modeling has also been conducted to simulate in detail the development of tensile and shear cracks in the MPTS test. A clump model rather than the standard Circular Particle Interaction (CPI) model was used to improve the strength envelope.

UR - http://www.scopus.com/inward/record.url?scp=69149092922&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=69149092922&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:69149092922

BT - Proceedings of the 41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics

ER -