Strain rate influence on fracture development in experimental ductile multilayers

Enrique Gomez-Rivas; Albert Griera

doi:10.1016/j.tecto.2011.02.006

Strain rate influence on fracture development in experimental ductile multilayers

Enrique Gomez-Rivas^* (Corresponding Author), Albert Griera

^*Corresponding author for this work

Autonomous University of Barcelona

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

10 Citations (Scopus)

Abstract

The far-field strain rate is a crucial parameter that controls the transition between brittle and ductile deformation. We have used analogue experiments to study the strain rate influence on the development of brittle fractures in a ductile composite material. Plasticine multilayer models were deformed under coaxial boundary conditions at three different strain rates to analyse the transition from non-localised deformation to the development of a brittle fracture network that accommodates part of the deformation. The results show that tension cracks and voids are the first macroscopic structures that nucleate after an early stage of ductile deformation. Coalescence and collapse of these structures lead to the development of brittle shear fractures. The evolution of fracture orientations, lengths and displacements was systematically analysed. The ratio of the accumulated fracture displacement vs. fracture length (d(max)/L) depends not only on the total deformation, but also on the strain rate at which the system is deformed. The accumulated displacement with respect to fracture length increases with strain rate. (C) 2011 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	351-363
Number of pages	13
Journal	Tectonophysics
Volume	502
Issue number	3-4
Early online date	19 Feb 2011
DOIs	https://doi.org/10.1016/j.tecto.2011.02.006
Publication status	Published - 20 Apr 2011

Bibliographical note

This work was financed through the PhD grant BES-2003-0755 to EGR and research project CGL2004-03657, both funded by the Spanish Ministry of Education and Science. We thank J. Carreras and E. Druguet for discussions on various aspects related to this work, and to P.D. Bons and M.W. Jessell for many valuable suggestions. We gratefully acknowledge G. Zulauf and N.S. Mancktelow, whose constructive reviews greatly improved the manuscript, together with the editorial guidance of F. Storti.

Keywords

analogue modelling
strain rate
multilayer
shear fracture
fracture displacement
shear zones
flanking structures
brittle-fracture
fault
deformation
fluid
flow
rock
displacement
propagation

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title = "Strain rate influence on fracture development in experimental ductile multilayers",

abstract = "The far-field strain rate is a crucial parameter that controls the transition between brittle and ductile deformation. We have used analogue experiments to study the strain rate influence on the development of brittle fractures in a ductile composite material. Plasticine multilayer models were deformed under coaxial boundary conditions at three different strain rates to analyse the transition from non-localised deformation to the development of a brittle fracture network that accommodates part of the deformation. The results show that tension cracks and voids are the first macroscopic structures that nucleate after an early stage of ductile deformation. Coalescence and collapse of these structures lead to the development of brittle shear fractures. The evolution of fracture orientations, lengths and displacements was systematically analysed. The ratio of the accumulated fracture displacement vs. fracture length (d(max)/L) depends not only on the total deformation, but also on the strain rate at which the system is deformed. The accumulated displacement with respect to fracture length increases with strain rate. (C) 2011 Elsevier B.V. All rights reserved.",

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author = "Enrique Gomez-Rivas and Albert Griera",

note = "This work was financed through the PhD grant BES-2003-0755 to EGR and research project CGL2004-03657, both funded by the Spanish Ministry of Education and Science. We thank J. Carreras and E. Druguet for discussions on various aspects related to this work, and to P.D. Bons and M.W. Jessell for many valuable suggestions. We gratefully acknowledge G. Zulauf and N.S. Mancktelow, whose constructive reviews greatly improved the manuscript, together with the editorial guidance of F. Storti. ",

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AU - Gomez-Rivas, Enrique

AU - Griera, Albert

N1 - This work was financed through the PhD grant BES-2003-0755 to EGR and research project CGL2004-03657, both funded by the Spanish Ministry of Education and Science. We thank J. Carreras and E. Druguet for discussions on various aspects related to this work, and to P.D. Bons and M.W. Jessell for many valuable suggestions. We gratefully acknowledge G. Zulauf and N.S. Mancktelow, whose constructive reviews greatly improved the manuscript, together with the editorial guidance of F. Storti.

PY - 2011/4/20

Y1 - 2011/4/20

N2 - The far-field strain rate is a crucial parameter that controls the transition between brittle and ductile deformation. We have used analogue experiments to study the strain rate influence on the development of brittle fractures in a ductile composite material. Plasticine multilayer models were deformed under coaxial boundary conditions at three different strain rates to analyse the transition from non-localised deformation to the development of a brittle fracture network that accommodates part of the deformation. The results show that tension cracks and voids are the first macroscopic structures that nucleate after an early stage of ductile deformation. Coalescence and collapse of these structures lead to the development of brittle shear fractures. The evolution of fracture orientations, lengths and displacements was systematically analysed. The ratio of the accumulated fracture displacement vs. fracture length (d(max)/L) depends not only on the total deformation, but also on the strain rate at which the system is deformed. The accumulated displacement with respect to fracture length increases with strain rate. (C) 2011 Elsevier B.V. All rights reserved.

AB - The far-field strain rate is a crucial parameter that controls the transition between brittle and ductile deformation. We have used analogue experiments to study the strain rate influence on the development of brittle fractures in a ductile composite material. Plasticine multilayer models were deformed under coaxial boundary conditions at three different strain rates to analyse the transition from non-localised deformation to the development of a brittle fracture network that accommodates part of the deformation. The results show that tension cracks and voids are the first macroscopic structures that nucleate after an early stage of ductile deformation. Coalescence and collapse of these structures lead to the development of brittle shear fractures. The evolution of fracture orientations, lengths and displacements was systematically analysed. The ratio of the accumulated fracture displacement vs. fracture length (d(max)/L) depends not only on the total deformation, but also on the strain rate at which the system is deformed. The accumulated displacement with respect to fracture length increases with strain rate. (C) 2011 Elsevier B.V. All rights reserved.

KW - analogue modelling

KW - strain rate

KW - multilayer

KW - shear fracture

KW - fracture displacement

KW - shear zones

KW - flanking structures

KW - brittle-fracture

KW - fault

KW - deformation

KW - fluid

KW - flow

KW - rock

KW - displacement

KW - propagation

U2 - 10.1016/j.tecto.2011.02.006

DO - 10.1016/j.tecto.2011.02.006

M3 - Article

SN - 0040-1951

VL - 502

SP - 351

EP - 363

JO - Tectonophysics

JF - Tectonophysics

IS - 3-4

ER -

Strain rate influence on fracture development in experimental ductile multilayers

Abstract

Bibliographical note

Keywords

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