The relationship between particle strength and particle breakage in loaded gravels
The particle breakage behaviour of coarse grains during shearing of a gravelly granular assemblage changes in accordance with the magnitude of the confining stress acting on the assemblage. The transition from particle rearrangement and sliding to particle breakage is studied for two gravelly materi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2017-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://doi.org/10.1051/epjconf/201714007008 |
| _version_ | 1818455880836841472 |
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| author | Fityus Stephen Simmons John |
| author_facet | Fityus Stephen Simmons John |
| author_sort | Fityus Stephen |
| collection | DOAJ |
| description | The particle breakage behaviour of coarse grains during shearing of a gravelly granular assemblage changes in accordance with the magnitude of the confining stress acting on the assemblage. The transition from particle rearrangement and sliding to particle breakage is studied for two gravelly materials subjected to a wide range of compressive and shear stresses (10kPa to 3.5MPa). The tested materials are a gravel fraction derived from crushed sedimentary sandstones and shales, and a gravel derived from a crushed rhyodacitic volcanic. At low confining stresses, breakage due to compression and shear are both small, with only some fine fragments produced. Confining stress increase results in a stage being reached where particle damage starts to increase greatly, under both compressive and shearing loads. The results indicate that, as stresses become very large, the particle breakage due to compression continues to increase, but the breakage due to shearing under the same vertical stress actually decreases. This is attributed to the attainment of a fabric which, through extreme damage during compression, allows subsequent shearing with reduced additional particle damage. |
| first_indexed | 2024-12-14T22:17:49Z |
| format | Article |
| id | doaj.art-93144041ad2a43ee803ea397e961070d |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-14T22:17:49Z |
| publishDate | 2017-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-93144041ad2a43ee803ea397e961070d2022-12-21T22:45:34ZengEDP SciencesEPJ Web of Conferences2100-014X2017-01-011400700810.1051/epjconf/201714007008epjconf162043The relationship between particle strength and particle breakage in loaded gravelsFityus Stephen0Simmons JohnThe School of Engineering, University of Newcastle, University DriveThe particle breakage behaviour of coarse grains during shearing of a gravelly granular assemblage changes in accordance with the magnitude of the confining stress acting on the assemblage. The transition from particle rearrangement and sliding to particle breakage is studied for two gravelly materials subjected to a wide range of compressive and shear stresses (10kPa to 3.5MPa). The tested materials are a gravel fraction derived from crushed sedimentary sandstones and shales, and a gravel derived from a crushed rhyodacitic volcanic. At low confining stresses, breakage due to compression and shear are both small, with only some fine fragments produced. Confining stress increase results in a stage being reached where particle damage starts to increase greatly, under both compressive and shearing loads. The results indicate that, as stresses become very large, the particle breakage due to compression continues to increase, but the breakage due to shearing under the same vertical stress actually decreases. This is attributed to the attainment of a fabric which, through extreme damage during compression, allows subsequent shearing with reduced additional particle damage.https://doi.org/10.1051/epjconf/201714007008 |
| spellingShingle | Fityus Stephen Simmons John The relationship between particle strength and particle breakage in loaded gravels EPJ Web of Conferences |
| title | The relationship between particle strength and particle breakage in loaded gravels |
| title_full | The relationship between particle strength and particle breakage in loaded gravels |
| title_fullStr | The relationship between particle strength and particle breakage in loaded gravels |
| title_full_unstemmed | The relationship between particle strength and particle breakage in loaded gravels |
| title_short | The relationship between particle strength and particle breakage in loaded gravels |
| title_sort | relationship between particle strength and particle breakage in loaded gravels |
| url | https://doi.org/10.1051/epjconf/201714007008 |
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