Grain Size Effect on the Mechanical Behavior of Cohesionless Coarse-Grained Soils with the Discrete Element Method
Biaxial compression tests with the same specimen size and different maximum grain sizes were simulated for coarse-grained soils using the discrete element method to study the influence of grain size on the mechanical properties and force chain. The maximum grain sizes were 40, 20, 10, and 5 mm, resp...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/4608930 |
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| _version_ | 1849412906391699456 |
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| author | Renjie Wen Cai Tan Yong Wu Chen Wang |
| author_facet | Renjie Wen Cai Tan Yong Wu Chen Wang |
| author_sort | Renjie Wen |
| collection | DOAJ |
| description | Biaxial compression tests with the same specimen size and different maximum grain sizes were simulated for coarse-grained soils using the discrete element method to study the influence of grain size on the mechanical properties and force chain. The maximum grain sizes were 40, 20, 10, and 5 mm, respectively. The grading with self-similar fractal structure in mass is designed to ensure the same pore structure for soils. The shear strength increased with the increase in maximum grain size. Evident increase in shear strength and significant size effect were observed when the ratio of the specimen diameter to maximum grain size was less than five. The shear dilation of coarse-grained soils increases with the increase in maximum grain size. The contact force distribution was uniform when maximum grain size was small but tends to be uneven with the increase in maximum grain size, thereby causing the increase in shear strength by stable strong force chains. This finding demonstrates size effect on the mechanical properties and force chain of cohesionless coarse-grained soils under the biaxial compression condition. |
| format | Article |
| id | doaj-art-4c8d0c36758a47bc8b8cf9c0ce428515 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-4c8d0c36758a47bc8b8cf9c0ce4285152025-08-20T03:34:18ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/46089304608930Grain Size Effect on the Mechanical Behavior of Cohesionless Coarse-Grained Soils with the Discrete Element MethodRenjie Wen0Cai Tan1Yong Wu2Chen Wang3State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower Engineering, Sichuan University, Chengdu 610065, ChinaGuangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, ChinaThe Upper Reaches of the Huadian Jinsha River Hydropower Development Co., Ltd., Chengdu 610041, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower Engineering, Sichuan University, Chengdu 610065, ChinaBiaxial compression tests with the same specimen size and different maximum grain sizes were simulated for coarse-grained soils using the discrete element method to study the influence of grain size on the mechanical properties and force chain. The maximum grain sizes were 40, 20, 10, and 5 mm, respectively. The grading with self-similar fractal structure in mass is designed to ensure the same pore structure for soils. The shear strength increased with the increase in maximum grain size. Evident increase in shear strength and significant size effect were observed when the ratio of the specimen diameter to maximum grain size was less than five. The shear dilation of coarse-grained soils increases with the increase in maximum grain size. The contact force distribution was uniform when maximum grain size was small but tends to be uneven with the increase in maximum grain size, thereby causing the increase in shear strength by stable strong force chains. This finding demonstrates size effect on the mechanical properties and force chain of cohesionless coarse-grained soils under the biaxial compression condition.http://dx.doi.org/10.1155/2018/4608930 |
| spellingShingle | Renjie Wen Cai Tan Yong Wu Chen Wang Grain Size Effect on the Mechanical Behavior of Cohesionless Coarse-Grained Soils with the Discrete Element Method Advances in Civil Engineering |
| title | Grain Size Effect on the Mechanical Behavior of Cohesionless Coarse-Grained Soils with the Discrete Element Method |
| title_full | Grain Size Effect on the Mechanical Behavior of Cohesionless Coarse-Grained Soils with the Discrete Element Method |
| title_fullStr | Grain Size Effect on the Mechanical Behavior of Cohesionless Coarse-Grained Soils with the Discrete Element Method |
| title_full_unstemmed | Grain Size Effect on the Mechanical Behavior of Cohesionless Coarse-Grained Soils with the Discrete Element Method |
| title_short | Grain Size Effect on the Mechanical Behavior of Cohesionless Coarse-Grained Soils with the Discrete Element Method |
| title_sort | grain size effect on the mechanical behavior of cohesionless coarse grained soils with the discrete element method |
| url | http://dx.doi.org/10.1155/2018/4608930 |
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