High-temporal-resolution quasideterministic dynamics of granular stick-slip

Abstract We report high-temporal-resolution observations of the spontaneous instability of model granular materials under isotropic and triaxial compression in fully drained conditions during laboratory tests representative of earthquakes. Unlike in natural granular materials, in the model granular...

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Autores principales:	T. T. T. Nguyen, T. Doanh, A. Le Bot, D. Dalmas
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/cdc0e31730474e2eab3269ebb8a5c5af
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spelling	oai:doaj.org-article:cdc0e31730474e2eab3269ebb8a5c5af2021-12-02T10:44:14ZHigh-temporal-resolution quasideterministic dynamics of granular stick-slip10.1038/s41598-021-82581-x2045-2322https://doaj.org/article/cdc0e31730474e2eab3269ebb8a5c5af2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82581-xhttps://doaj.org/toc/2045-2322Abstract We report high-temporal-resolution observations of the spontaneous instability of model granular materials under isotropic and triaxial compression in fully drained conditions during laboratory tests representative of earthquakes. Unlike in natural granular materials, in the model granular materials, during the first stage of the tests, i.e., isotropic compression, a series of local collapses of various amplitudes occurs under random triggering cell pressures. During the second stage, i.e., shearing under triaxial compression, the model granular samples exhibit very large quasiperiodic stick-slip motions at random deviatoric triggering stresses. These motions are responsible for very large stress drops that are described by power laws and are accurate over more than 3 decades in logarithmic space. Then, we identify the quasideterministic nature of these stick-slip events, assuming that they are fully controlled by the cell pressure and solid fraction. Finally, we discuss the potential mechanisms that could explain these intriguing behaviors and the possible links with natural earthquakes.T. T. T. NguyenT. DoanhA. Le BotD. DalmasNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q T. T. T. Nguyen T. Doanh A. Le Bot D. Dalmas High-temporal-resolution quasideterministic dynamics of granular stick-slip
description	Abstract We report high-temporal-resolution observations of the spontaneous instability of model granular materials under isotropic and triaxial compression in fully drained conditions during laboratory tests representative of earthquakes. Unlike in natural granular materials, in the model granular materials, during the first stage of the tests, i.e., isotropic compression, a series of local collapses of various amplitudes occurs under random triggering cell pressures. During the second stage, i.e., shearing under triaxial compression, the model granular samples exhibit very large quasiperiodic stick-slip motions at random deviatoric triggering stresses. These motions are responsible for very large stress drops that are described by power laws and are accurate over more than 3 decades in logarithmic space. Then, we identify the quasideterministic nature of these stick-slip events, assuming that they are fully controlled by the cell pressure and solid fraction. Finally, we discuss the potential mechanisms that could explain these intriguing behaviors and the possible links with natural earthquakes.
format	article
author	T. T. T. Nguyen T. Doanh A. Le Bot D. Dalmas
author_facet	T. T. T. Nguyen T. Doanh A. Le Bot D. Dalmas
author_sort	T. T. T. Nguyen
title	High-temporal-resolution quasideterministic dynamics of granular stick-slip
title_short	High-temporal-resolution quasideterministic dynamics of granular stick-slip
title_full	High-temporal-resolution quasideterministic dynamics of granular stick-slip
title_fullStr	High-temporal-resolution quasideterministic dynamics of granular stick-slip
title_full_unstemmed	High-temporal-resolution quasideterministic dynamics of granular stick-slip
title_sort	high-temporal-resolution quasideterministic dynamics of granular stick-slip
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/cdc0e31730474e2eab3269ebb8a5c5af
work_keys_str_mv	AT tttnguyen hightemporalresolutionquasideterministicdynamicsofgranularstickslip AT tdoanh hightemporalresolutionquasideterministicdynamicsofgranularstickslip AT alebot hightemporalresolutionquasideterministicdynamicsofgranularstickslip AT ddalmas hightemporalresolutionquasideterministicdynamicsofgranularstickslip
_version_	1718396791051780096

High-temporal-resolution quasideterministic dynamics of granular stick-slip

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