Size effects in fracture of rock

Joseph F. Labuz; Luigi Biolzi

Size effects in fracture of rock

Joseph F. Labuz
, Luigi Biolzi

Civil, Environmental, and Geo- Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The fracture of rock is influenced by the development of an intrinsic process zone in the form of a localized region of microcracking. This zone has a fundamental importance for defining the system behavior in terms of the post-peak instability and in terms of material strength such that size effects appear. This paper illustrates the change in the load-displacement response and presents evidence of the process-zone development with varying specimen size. It is demonstrated that fracture problems do not require geometric or material nonlinearity to produce instability. The size of a structure that fails by fracture is an important factor. Furthermore, experiments suggest that an intrinsic zone develops in rock as a material characteristic. Because of this intrinsic length, two competing factors define the nominal strength-the positive contribution of the process zone and the depleting aspects of the undamaged volume, that is, the size.

Original language	English (US)
Title of host publication	Vail Rocks 1999 - 37th U.S. Symposium on Rock Mechanics (USRMS)
Editors	Kranz, Smeallie, Scott, Amadei
Publisher	American Rock Mechanics Association (ARMA)
Pages	1137-1143
Number of pages	7
ISBN (Print)	9058090523, 9789058090522
State	Published - 1999
Event	37th U.S. Symposium on Rock Mechanics, Vail Rocks 1999 - Vail, United States Duration: Jun 7 1999 → Jun 9 1999

Publication series

Name	Vail Rocks 1999 - 37th U.S. Symposium on Rock Mechanics (USRMS)

Other

Other	37th U.S. Symposium on Rock Mechanics, Vail Rocks 1999
Country/Territory	United States
City	Vail
Period	6/7/99 → 6/9/99

Bibliographical note

Funding Information:
Acknowledgment:P artial supportw as provided by the NationalS cienceF oundatioGn rantN umber CMS-9532061 and the North Atlantic Treaty Organization Collaborative Research Grant Number 950695.

Funding Information:
Partial support was provided by the National Science Foundation Grant Number CMS-9532061 and the North Atlantic Treaty Organization Collaborative Research Grant Number 950695.

Publisher Copyright:
© 1999 Balkema, Rotterdam.

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Size effects in fracture of rock. / Labuz, Joseph F.; Biolzi, Luigi.
Vail Rocks 1999 - 37th U.S. Symposium on Rock Mechanics (USRMS). ed. / Kranz; Smeallie; Scott; Amadei. American Rock Mechanics Association (ARMA), 1999. p. 1137-1143 (Vail Rocks 1999 - 37th U.S. Symposium on Rock Mechanics (USRMS)).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Labuz, JF & Biolzi, L 1999, Size effects in fracture of rock. in Kranz, Smeallie, Scott & Amadei (eds), Vail Rocks 1999 - 37th U.S. Symposium on Rock Mechanics (USRMS). Vail Rocks 1999 - 37th U.S. Symposium on Rock Mechanics (USRMS), American Rock Mechanics Association (ARMA), pp. 1137-1143, 37th U.S. Symposium on Rock Mechanics, Vail Rocks 1999, Vail, United States, 6/7/99.

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title = "Size effects in fracture of rock",

abstract = "The fracture of rock is influenced by the development of an intrinsic process zone in the form of a localized region of microcracking. This zone has a fundamental importance for defining the system behavior in terms of the post-peak instability and in terms of material strength such that size effects appear. This paper illustrates the change in the load-displacement response and presents evidence of the process-zone development with varying specimen size. It is demonstrated that fracture problems do not require geometric or material nonlinearity to produce instability. The size of a structure that fails by fracture is an important factor. Furthermore, experiments suggest that an intrinsic zone develops in rock as a material characteristic. Because of this intrinsic length, two competing factors define the nominal strength-the positive contribution of the process zone and the depleting aspects of the undamaged volume, that is, the size.",

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note = "Funding Information: Acknowledgment:P artial supportw as provided by the NationalS cienceF oundatioGn rantN umber CMS-9532061 and the North Atlantic Treaty Organization Collaborative Research Grant Number 950695. Funding Information: Partial support was provided by the National Science Foundation Grant Number CMS-9532061 and the North Atlantic Treaty Organization Collaborative Research Grant Number 950695. Publisher Copyright: {\textcopyright} 1999 Balkema, Rotterdam.; 37th U.S. Symposium on Rock Mechanics, Vail Rocks 1999 ; Conference date: 07-06-1999 Through 09-06-1999",

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AU - Biolzi, Luigi

N1 - Funding Information: Acknowledgment:P artial supportw as provided by the NationalS cienceF oundatioGn rantN umber CMS-9532061 and the North Atlantic Treaty Organization Collaborative Research Grant Number 950695. Funding Information: Partial support was provided by the National Science Foundation Grant Number CMS-9532061 and the North Atlantic Treaty Organization Collaborative Research Grant Number 950695. Publisher Copyright: © 1999 Balkema, Rotterdam.

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Y1 - 1999

N2 - The fracture of rock is influenced by the development of an intrinsic process zone in the form of a localized region of microcracking. This zone has a fundamental importance for defining the system behavior in terms of the post-peak instability and in terms of material strength such that size effects appear. This paper illustrates the change in the load-displacement response and presents evidence of the process-zone development with varying specimen size. It is demonstrated that fracture problems do not require geometric or material nonlinearity to produce instability. The size of a structure that fails by fracture is an important factor. Furthermore, experiments suggest that an intrinsic zone develops in rock as a material characteristic. Because of this intrinsic length, two competing factors define the nominal strength-the positive contribution of the process zone and the depleting aspects of the undamaged volume, that is, the size.

AB - The fracture of rock is influenced by the development of an intrinsic process zone in the form of a localized region of microcracking. This zone has a fundamental importance for defining the system behavior in terms of the post-peak instability and in terms of material strength such that size effects appear. This paper illustrates the change in the load-displacement response and presents evidence of the process-zone development with varying specimen size. It is demonstrated that fracture problems do not require geometric or material nonlinearity to produce instability. The size of a structure that fails by fracture is an important factor. Furthermore, experiments suggest that an intrinsic zone develops in rock as a material characteristic. Because of this intrinsic length, two competing factors define the nominal strength-the positive contribution of the process zone and the depleting aspects of the undamaged volume, that is, the size.

UR - https://www.scopus.com/pages/publications/85058842935

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M3 - Conference contribution

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SN - 9058090523

SN - 9789058090522

T3 - Vail Rocks 1999 - 37th U.S. Symposium on Rock Mechanics (USRMS)

SP - 1137

EP - 1143

BT - Vail Rocks 1999 - 37th U.S. Symposium on Rock Mechanics (USRMS)

A2 - Kranz, null

A2 - Smeallie, null

A2 - Scott, null

A2 - Amadei, null

PB - American Rock Mechanics Association (ARMA)

T2 - 37th U.S. Symposium on Rock Mechanics, Vail Rocks 1999

Y2 - 7 June 1999 through 9 June 1999

ER -

Size effects in fracture of rock

Abstract

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