Liang, luju;
Cheng, Yi Pik;
Xu, Changjie;
Wei, Gang;
Ding, Zhi;
(2024)
Microscopic mechanisms of particle size effect on 2D arching effect development and degradation in granular materials.
International Journal for Multiscale Computational Engineering
, 22
(2)
pp. 91-108.
10.1615/intjmultcompeng.2023049782.
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Abstract
This study carries out a series of discrete element method numerical simulations to investigates the microscopic mechanisms of arching effect development and degradation in classical two-dimensional trapdoor problem with different mean particle sizes. Both the macroscopic and microscopic behaviors of particles under the influence of arching effect are examined. The simulation results of the granular assembly above a displacement-controlled trapdoor are divided into three zones: a shield zone, arch zone, and stable zone, according to the extent of particle vertical displacement for analysis. The impacts of the mean particle size relative to trapdoor width on various zones are carefully evaluated. Microscopic parameters, including the friction mobilization index, the average coordination number, and the mean particle contact force, are found to be all influenced by the mean particle size and show different behaviors in the three zones. The average particle contact force within the arch zone shows the highest correlation to the evolution of arching effect in particle samples with different particle size. These findings not only provided new insights into the correlation between the particle scale mechanisms and the macroscopic arching effect but also highlight the mean particle size influence on the evolution of arching effect in granular materials.
| Type: | Article |
|---|---|
| Title: | Microscopic mechanisms of particle size effect on 2D arching effect development and degradation in granular materials |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1615/intjmultcompeng.2023049782 |
| Publisher version: | https://dl.begellhouse.com/journals/61fd1b191cf7e9... |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | arching effect, discrete element modelling, mechanisms, granular materials, particle size effect |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10182828 |
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