Strength of shear bands in fluid-saturated rocks: a nonlinear effect of competition between dilation and fluid flow

This study shows the significant and nonlinear effect of the competition between dilation and fluid flow on the shear strength of constrained shear bands in fluid-saturated rocks. This effect is conditioned by the contribution of the pore pressure to the yield stress and strength. The pore pressure...

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Autores principales: Shilko, Evgeny V., Dimaki, Andrey V., Psakhie, Sergey G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5780515/
https://www.ncbi.nlm.nih.gov/pubmed/29362426
http://dx.doi.org/10.1038/s41598-018-19843-8
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author Shilko, Evgeny V.
Dimaki, Andrey V.
Psakhie, Sergey G.
author_facet Shilko, Evgeny V.
Dimaki, Andrey V.
Psakhie, Sergey G.
author_sort Shilko, Evgeny V.
collection PubMed
description This study shows the significant and nonlinear effect of the competition between dilation and fluid flow on the shear strength of constrained shear bands in fluid-saturated rocks. This effect is conditioned by the contribution of the pore pressure to the yield stress and strength. The pore pressure is controlled by the dilation of the pore space in the solid skeleton of the shear band during plastic deformation and by squeezing of pores in surrounding blocks by the dilating shear band due to the high stiffness of the host massif. A generalized equation has been derived to describe the dependence of the shear band strength on the ratio of strain rate to fluid flow rate.
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spelling pubmed-57805152018-02-06 Strength of shear bands in fluid-saturated rocks: a nonlinear effect of competition between dilation and fluid flow Shilko, Evgeny V. Dimaki, Andrey V. Psakhie, Sergey G. Sci Rep Article This study shows the significant and nonlinear effect of the competition between dilation and fluid flow on the shear strength of constrained shear bands in fluid-saturated rocks. This effect is conditioned by the contribution of the pore pressure to the yield stress and strength. The pore pressure is controlled by the dilation of the pore space in the solid skeleton of the shear band during plastic deformation and by squeezing of pores in surrounding blocks by the dilating shear band due to the high stiffness of the host massif. A generalized equation has been derived to describe the dependence of the shear band strength on the ratio of strain rate to fluid flow rate. Nature Publishing Group UK 2018-01-23 /pmc/articles/PMC5780515/ /pubmed/29362426 http://dx.doi.org/10.1038/s41598-018-19843-8 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Shilko, Evgeny V.
Dimaki, Andrey V.
Psakhie, Sergey G.
Strength of shear bands in fluid-saturated rocks: a nonlinear effect of competition between dilation and fluid flow
title Strength of shear bands in fluid-saturated rocks: a nonlinear effect of competition between dilation and fluid flow
title_full Strength of shear bands in fluid-saturated rocks: a nonlinear effect of competition between dilation and fluid flow
title_fullStr Strength of shear bands in fluid-saturated rocks: a nonlinear effect of competition between dilation and fluid flow
title_full_unstemmed Strength of shear bands in fluid-saturated rocks: a nonlinear effect of competition between dilation and fluid flow
title_short Strength of shear bands in fluid-saturated rocks: a nonlinear effect of competition between dilation and fluid flow
title_sort strength of shear bands in fluid-saturated rocks: a nonlinear effect of competition between dilation and fluid flow
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5780515/
https://www.ncbi.nlm.nih.gov/pubmed/29362426
http://dx.doi.org/10.1038/s41598-018-19843-8
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