Experimental and numerical investigation of the punch-through shear test for mode II fracture toughness determination in rock

Haoyan Wu; John Kemeny; Shunchuan Wu

doi:10.1016/j.engfracmech.2017.08.006

Experimental and numerical investigation of the punch-through shear test for mode II fracture toughness determination in rock

Haoyan Wu, John Kemeny, Shunchuan Wu

Mining and Geological Engineering

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

40 Scopus citations

Abstract

The punch through shear test is a laboratory test used to determine the shear fracture toughness K_IIC in rock. In this paper, the punch-through shear test was simulated using a discrete element particle model, and the dependence of K_IIC on loading velocity and confinement ranging from 0.1 to 80 MPa was investigated. The numerical results of K_IIC vs. confinement match very well with laboratory tests, and the development of complex shear fractures during the test are analyzed in terms of the formation and coalescence of tensile and shear micro-cracking at different confining stresses, and the use of numerical acoustic emission recording.

Original language	English (US)
Pages (from-to)	59-74
Number of pages	16
Journal	Engineering Fracture Mechanics
Volume	184
DOIs	https://doi.org/10.1016/j.engfracmech.2017.08.006
State	Published - Oct 15 2017

Keywords

Acoustic emission
Mode II fracture toughness
PFC
Punch-through shear test

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1016/j.engfracmech.2017.08.006

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title = "Experimental and numerical investigation of the punch-through shear test for mode II fracture toughness determination in rock",

abstract = "The punch through shear test is a laboratory test used to determine the shear fracture toughness KIIC in rock. In this paper, the punch-through shear test was simulated using a discrete element particle model, and the dependence of KIIC on loading velocity and confinement ranging from 0.1 to 80 MPa was investigated. The numerical results of KIIC vs. confinement match very well with laboratory tests, and the development of complex shear fractures during the test are analyzed in terms of the formation and coalescence of tensile and shear micro-cracking at different confining stresses, and the use of numerical acoustic emission recording.",

keywords = "Acoustic emission, Mode II fracture toughness, PFC, Punch-through shear test",

author = "Haoyan Wu and John Kemeny and Shunchuan Wu",

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year = "2017",

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doi = "10.1016/j.engfracmech.2017.08.006",

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T1 - Experimental and numerical investigation of the punch-through shear test for mode II fracture toughness determination in rock

AU - Wu, Haoyan

AU - Kemeny, John

AU - Wu, Shunchuan

PY - 2017/10/15

Y1 - 2017/10/15

N2 - The punch through shear test is a laboratory test used to determine the shear fracture toughness KIIC in rock. In this paper, the punch-through shear test was simulated using a discrete element particle model, and the dependence of KIIC on loading velocity and confinement ranging from 0.1 to 80 MPa was investigated. The numerical results of KIIC vs. confinement match very well with laboratory tests, and the development of complex shear fractures during the test are analyzed in terms of the formation and coalescence of tensile and shear micro-cracking at different confining stresses, and the use of numerical acoustic emission recording.

AB - The punch through shear test is a laboratory test used to determine the shear fracture toughness KIIC in rock. In this paper, the punch-through shear test was simulated using a discrete element particle model, and the dependence of KIIC on loading velocity and confinement ranging from 0.1 to 80 MPa was investigated. The numerical results of KIIC vs. confinement match very well with laboratory tests, and the development of complex shear fractures during the test are analyzed in terms of the formation and coalescence of tensile and shear micro-cracking at different confining stresses, and the use of numerical acoustic emission recording.

KW - Acoustic emission

KW - Mode II fracture toughness

KW - PFC

KW - Punch-through shear test

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JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

ER -

Experimental and numerical investigation of the punch-through shear test for mode II fracture toughness determination in rock

Abstract

Keywords

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