Shear bands in dense fault gouge
Earthquakes happen with frictional sliding, by releasing all the stresses accumulated in the prestressed surrounding medium. The geological fault gouge, coming from the wear of previous slips, acts on friction stability and plays a key role in this sudden energy release. A large part of slip mechani...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2021-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2021/03/epjconf_pg2021_11006.pdf |
| _version_ | 1831586617289080832 |
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| author | Casas Nathalie Mollon Guilhem Daouadji Ali |
| author_facet | Casas Nathalie Mollon Guilhem Daouadji Ali |
| author_sort | Casas Nathalie |
| collection | DOAJ |
| description | Earthquakes happen with frictional sliding, by releasing all the stresses accumulated in the prestressed surrounding medium. The geological fault gouge, coming from the wear of previous slips, acts on friction stability and plays a key role in this sudden energy release. A large part of slip mechanisms are influenced, if not controlled, by the characteristics and environment of this tribological “third body”. A 2D granular fault (mm scale) is implemented with Discrete Element Modelling (DEM). A displacement-driven model with dry contact is studied to observe kinematics and properties of the slipping zone. Increasing the length of the granular media increases the slip needed to weaken the friction from friction peak to steadystate. Low-angle Riedel shear bands are mostly observed. Their number increases with the inter-particle friction coefficient, which also influences shear bands formation in their orientation angle (higher friction leads to higher angle with the main slip direction). |
| first_indexed | 2024-12-17T21:40:08Z |
| format | Article |
| id | doaj.art-f69e5617ac8947d28b61e7a63267b677 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-17T21:40:08Z |
| publishDate | 2021-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-f69e5617ac8947d28b61e7a63267b6772022-12-21T21:31:38ZengEDP SciencesEPJ Web of Conferences2100-014X2021-01-012491100610.1051/epjconf/202124911006epjconf_pg2021_11006Shear bands in dense fault gougeCasas NathalieMollon Guilhem0Daouadji Ali1Univ Lyon, INSA-Lyon, CNRS UMR5259, LaMCoSUniv. Lyon, INSA-Lyon, GEOMAS, EA7495Earthquakes happen with frictional sliding, by releasing all the stresses accumulated in the prestressed surrounding medium. The geological fault gouge, coming from the wear of previous slips, acts on friction stability and plays a key role in this sudden energy release. A large part of slip mechanisms are influenced, if not controlled, by the characteristics and environment of this tribological “third body”. A 2D granular fault (mm scale) is implemented with Discrete Element Modelling (DEM). A displacement-driven model with dry contact is studied to observe kinematics and properties of the slipping zone. Increasing the length of the granular media increases the slip needed to weaken the friction from friction peak to steadystate. Low-angle Riedel shear bands are mostly observed. Their number increases with the inter-particle friction coefficient, which also influences shear bands formation in their orientation angle (higher friction leads to higher angle with the main slip direction).https://www.epj-conferences.org/articles/epjconf/pdf/2021/03/epjconf_pg2021_11006.pdf |
| spellingShingle | Casas Nathalie Mollon Guilhem Daouadji Ali Shear bands in dense fault gouge EPJ Web of Conferences |
| title | Shear bands in dense fault gouge |
| title_full | Shear bands in dense fault gouge |
| title_fullStr | Shear bands in dense fault gouge |
| title_full_unstemmed | Shear bands in dense fault gouge |
| title_short | Shear bands in dense fault gouge |
| title_sort | shear bands in dense fault gouge |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2021/03/epjconf_pg2021_11006.pdf |
| work_keys_str_mv | AT casasnathalie shearbandsindensefaultgouge AT mollonguilhem shearbandsindensefaultgouge AT daouadjiali shearbandsindensefaultgouge |