DOI: 10.1029/2001jb000680. Brittle‐ductile transition and associated seismicity: Experimental and numerical studies and relationship with the <i>b</i> value

Brittle‐ductile transition and associated seismicity: Experimental and numerical studies and relationship with the b value

10.1029/2001jb000680

Crossref journal-article

American Geophysical Union (AGU)

Journal of Geophysical Research: Solid Earth (13)

Abstract

The acoustic emission (AE) and the mechanical behavior of granite samples during triaxial compression tests have been analyzed. The size of AE events displays power law distributions, conforming to the Gutenberg‐Richter law observed for earthquakes, which is characterized by the b value. As the confining pressure increases, the macroscopic behavior becomes more ductile. For all different stages of the rock mechanical behavior (linear, nonlinear prepeak, nonlinear postpeak, shearing), there is a systematic decrease of the b value with increasing confining pressure. A numerical model based on progressive elastic damage and the finite element method allows simulations of the main experimental observations on AE and of a wide range of macroscopic behaviors from brittleness to ductility. The model reproduces a decrease in the b value that appears to be related to the type of macroscopic behavior (brittle‐ductile) rather than to the confining pressure. Both experimental and numerical results suggest a relationship between the b value and the brittle‐ductile transition. Moreover, these results are consistent with recent earthquake observations and give new insight into the behavior of the Earth's crust.

Authors 1

David Amitrano (first)

References 46 Referenced 317

Amitrano D. Emission acoustique des roches et endommagement: Approches experimentale et numrique Application a la sismicite miniere Ph.D. thesis Univ. Joseph Fourier Grenoble France 1999.
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10.1029/2001JB900011
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{'key': 'e_1_2_8_12_1', 'first-page': '189', 'article-title': 'Measuring the strangeness of strange attractors', 'volume': '9', 'author': 'Grassberger P.', 'year': '1983', 'journal-title': 'Physica'} / Physica / Measuring the strangeness of strange attractors by Grassberger P. (1983)
{'volume-title': 'Seismicity of the Earth and Associated Phenomena', 'year': '1954', 'author': 'Gutenberg B.', 'key': 'e_1_2_8_13_1'} / Seismicity of the Earth and Associated Phenomena by Gutenberg B. (1954)
10.1029/93JB02873
10.1016/0191-8141(92)90053-Y
{'volume-title': 'Underground Excavations in Rock', 'year': '1982', 'author': 'Hoek E.', 'key': 'e_1_2_8_16_1'} / Underground Excavations in Rock by Hoek E. (1982)
Isnard P. Etude chimique du massif granitique du Sidobre (Tarn) Tech. Rep. Ec. Natl. de Geol. Nancy France 1982.
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{'key': 'e_1_2_8_23_1', 'first-page': '45', 'volume-title': 'Fifth Conference on Acoustic Emission and Micro‐Seismicity in Geological Structures and Mterials', 'author': 'Lockner D.', 'year': '1991'} / Fifth Conference on Acoustic Emission and Micro‐Seismicity in Geological Structures and Mterials by Lockner D. (1991)
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10.1111/j.1365-246X.1989.tb05255.x
{'key': 'e_1_2_8_26_1', 'series-title': 'Eur. Geophys. Soc.', 'volume-title': '26th General Assembly of the European Geophysical Society', 'author': 'Mekkawi M.', 'year': '2002'} / 26th General Assembly of the European Geophysical Society / Eur. Geophys. Soc. by Mekkawi M. (2002)
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{'key': 'e_1_2_8_29_1', 'first-page': '831', 'article-title': 'Magnitude frequency relations for elastic shocks accompanying fractures of various materials and some related problems in earthquakes', 'volume': '40', 'author': 'Mogi K.', 'year': '1962', 'journal-title': 'Bull. Earthquake Res. Inst. Univ. Tokyo'} / Bull. Earthquake Res. Inst. Univ. Tokyo / Magnitude frequency relations for elastic shocks accompanying fractures of various materials and some related problems in earthquakes by Mogi K. (1962)
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{'volume-title': 'The Mechanics of Earthquakes and Faulting', 'year': '1990', 'author': 'Scholz H.', 'key': 'e_1_2_8_37_1'} / The Mechanics of Earthquakes and Faulting by Scholz H. (1990)
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10.1038/41737

Dates

Type	When
Created	22 years, 3 months ago (May 23, 2003, 2:26 p.m.)
Deposited	1 year, 10 months ago (Oct. 14, 2023, 11:48 a.m.)
Indexed	2 days, 10 hours ago (Sept. 3, 2025, 6:58 a.m.)
Issued	22 years, 8 months ago (Jan. 1, 2003)
Published	22 years, 8 months ago (Jan. 1, 2003)
Published Online	22 years, 7 months ago (Jan. 25, 2003)
Published Print	22 years, 8 months ago (Jan. 1, 2003)

Funders 0

None

BibTeX

@article{Amitrano_2003, title={Brittle‐ductile transition and associated seismicity: Experimental and numerical studies and relationship with the b value}, volume={108}, ISSN={0148-0227}, url={http://dx.doi.org/10.1029/2001jb000680}, DOI={10.1029/2001jb000680}, number={B1}, journal={Journal of Geophysical Research: Solid Earth}, publisher={American Geophysical Union (AGU)}, author={Amitrano, David}, year={2003}, month=jan }

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