Factors affecting pre-failure instability of sand under plane-strain conditions
Experimental data obtained from a plane-strain appara- tus are presented in this paper to show that a pre-failure instability in the form of a rapid and sustained increase in strain rate can occur for both contractive and dilative sand under fully drained conditions. However, this type of instabilit...
| Main Authors: | , |
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| Format: | Article |
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Thomas Telford (ICE Publishing)
2012
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| Subjects: | |
| Online Access: | https://eprints.nottingham.ac.uk/48379/ |
| _version_ | 1848797751056269312 |
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| author | Wanatowski, D. Chu, J. |
| author_facet | Wanatowski, D. Chu, J. |
| author_sort | Wanatowski, D. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Experimental data obtained from a plane-strain appara- tus are presented in this paper to show that a pre-failure instability in the form of a rapid and sustained increase in strain rate can occur for both contractive and dilative sand under fully drained conditions. However, this type of instability is different from the runaway type of instability observed under undrained conditions, and has therefore been called conditional instability. Despite the differences, the conditions for both types of instability are the same for contractive sand. There are also other factors that affect the pre-failure instability of sand ob- served in the laboratory. These include the stress ratio, void ratio, sand state, load control mode and reduction rate of the effective confining stress. In this paper, these factors are discussed and analysed using experimental data obtained from undrained instability (or creep) tests and constant shear drained (CSD) tests carried out under plane-strain conditions. |
| first_indexed | 2025-11-14T20:08:51Z |
| format | Article |
| id | nottingham-48379 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:08:51Z |
| publishDate | 2012 |
| publisher | Thomas Telford (ICE Publishing) |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-483792020-05-04T16:32:22Z https://eprints.nottingham.ac.uk/48379/ Factors affecting pre-failure instability of sand under plane-strain conditions Wanatowski, D. Chu, J. Experimental data obtained from a plane-strain appara- tus are presented in this paper to show that a pre-failure instability in the form of a rapid and sustained increase in strain rate can occur for both contractive and dilative sand under fully drained conditions. However, this type of instability is different from the runaway type of instability observed under undrained conditions, and has therefore been called conditional instability. Despite the differences, the conditions for both types of instability are the same for contractive sand. There are also other factors that affect the pre-failure instability of sand ob- served in the laboratory. These include the stress ratio, void ratio, sand state, load control mode and reduction rate of the effective confining stress. In this paper, these factors are discussed and analysed using experimental data obtained from undrained instability (or creep) tests and constant shear drained (CSD) tests carried out under plane-strain conditions. Thomas Telford (ICE Publishing) 2012-02-28 Article PeerReviewed Wanatowski, D. and Chu, J. (2012) Factors affecting pre-failure instability of sand under plane-strain conditions. Géotechnique, 62 (2). pp. 121-135. ISSN 0016-8505 failure laboratory tests liquefaction pore pres- sures sands slopes https://doi.org/10.1680/geot.9.P.111 doi:10.1680/geot.9.P.111 doi:10.1680/geot.9.P.111 |
| spellingShingle | failure laboratory tests liquefaction pore pres- sures sands slopes Wanatowski, D. Chu, J. Factors affecting pre-failure instability of sand under plane-strain conditions |
| title | Factors affecting pre-failure instability of sand under plane-strain conditions |
| title_full | Factors affecting pre-failure instability of sand under plane-strain conditions |
| title_fullStr | Factors affecting pre-failure instability of sand under plane-strain conditions |
| title_full_unstemmed | Factors affecting pre-failure instability of sand under plane-strain conditions |
| title_short | Factors affecting pre-failure instability of sand under plane-strain conditions |
| title_sort | factors affecting pre-failure instability of sand under plane-strain conditions |
| topic | failure laboratory tests liquefaction pore pres- sures sands slopes |
| url | https://eprints.nottingham.ac.uk/48379/ https://eprints.nottingham.ac.uk/48379/ https://eprints.nottingham.ac.uk/48379/ |