eprintid: 10182828 rev_number: 11 eprint_status: archive userid: 699 dir: disk0/10/18/28/28 datestamp: 2023-12-04 15:01:31 lastmod: 2024-10-19 06:10:06 status_changed: 2023-12-04 15:01:31 type: article metadata_visibility: show sword_depositor: 699 creators_name: Liang, luju creators_name: Cheng, Yi Pik creators_name: Xu, Changjie creators_name: Wei, Gang creators_name: Ding, Zhi title: Microscopic mechanisms of particle size effect on 2D arching effect development and degradation in granular materials ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F44 keywords: arching effect, discrete element modelling, mechanisms, granular materials, particle size effect note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. 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. date: 2024-01-01 date_type: published publisher: Begell House official_url: https://dl.begellhouse.com/journals/61fd1b191cf7e96f.html oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2114102 doi: 10.1615/intjmultcompeng.2023049782 lyricists_name: Cheng, Yi lyricists_id: YPCHE61 actors_name: Cheng, Yi actors_id: YPCHE61 actors_role: owner full_text_status: public publication: International Journal for Multiscale Computational Engineering volume: 22 number: 2 pagerange: 91-108 citation: 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 <https://doi.org/10.1615/intjmultcompeng.2023049782>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10182828/1/Microscopic%20mechanisms%20of%20the%20particle%20size%20effect%20on%202D%20arching%20effect%20development%20and%20degradation_JMC_accepted.pdf