DISCRETE ELEMENT SIMULATION OF SAND CONFINED COMPRESSION TEST BASED ON MatDEM

QIN Yan; LIU Chun; ZHANG Xiaoyu; DENG Shang

doi:10.12090/j.issn.1006-6616.2018.24.05.068

Volume 24 Issue 5

Oct. 2018

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QIN Yan, LIU Chun, ZHANG Xiaoyu, et al., 2018. DISCRETE ELEMENT SIMULATION OF SAND CONFINED COMPRESSION TEST BASED ON MatDEM. Journal of Geomechanics, 24 (5): 676-681. DOI: 10.12090/j.issn.1006-6616.2018.24.05.068

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DISCRETE ELEMENT SIMULATION OF SAND CONFINED COMPRESSION TEST BASED ON MatDEM

doi: 10.12090/j.issn.1006-6616.2018.24.05.068

QIN Yan^1
,,
LIU Chun^{1, 2
,
,},
ZHANG Xiaoyu¹,
DENG Shang²

1.
School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, Jiangsu, China
2.
Nanjing University(Suzhou) High-Tech Institute, Suzhou 215123, Jingsu, China

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Received: 2018-06-01
Revised: 2018-08-15
Published: 2018-10-01

Abstract

Abstract

Discrete element method is suitable for numerical simulation of discrete mesoporous media such as sand, because discrete element method is based on discontinuous medium mechanics theory. A 3D discrete element simulator for sand confined compression test was developed by the discrete element simulation software MatDEM. Confined compression tests for 3 different graded sands were carried out, and the numerical simulation matched with the test was carried out. The validity of the developed simulator was verified by the comparison between the test and numerical simulation results. The results show that DEM can well reflect the change of the coordination number in the compression process of sand; in each sample, the elements with smaller size are subjected to greater average pressure, which leads to a larger average displacement; the main error of numerical simulation was caused by the Poisson's ratio of the discrete element particle. This study overcomes the limitations of the conventional soil mechanics research methods, and provides a reference for the study of the discrete element simulation of geotechnical engineering in the future.
- sand,
- confined compression test,
- DEM,
- numerical simulation,
- error analysis

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DISCRETE ELEMENT SIMULATION OF SAND CONFINED COMPRESSION TEST BASED ON MatDEM

doi: 10.12090/j.issn.1006-6616.2018.24.05.068

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DISCRETE ELEMENT SIMULATION OF SAND CONFINED COMPRESSION TEST BASED ON MatDEM

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