Discrete element modeling of direct shear tests for a granular material

2009 ◽  
Vol 34 (9) ◽  
pp. 978-990 ◽  
Author(s):  
Ying Yan ◽  
Shunying Ji
Keyword(s):  
Granular Material ◽  
Discrete Element ◽  
Direct Shear ◽  
Discrete Element Modeling ◽  
Shear Tests ◽  
Element Modeling ◽  
Direct Shear Tests

scholarly journals Frictional properties between geocells filled with granular material

2021 ◽  
Vol 20 (2) ◽  
pp. 332-345
Author(s):  
Gökhan Altay ◽  
◽  
Cafer Kayadelen ◽  
Taha Taskiran ◽  
Baki Bagriacik ◽  
...  
Keyword(s):  
Granular Material ◽  
Normal Stress ◽  
Granular Materials ◽  
Direct Shear ◽  
Shear Tests ◽  
Direct Shear Tests ◽  
Frictional Properties ◽  
Geotechnical Structures ◽  
Series Of Experiments ◽  
Restricted Volume

The parameters concerning the interaction between geocell and granular materials is required for the design of many geotechnical structures. With this in mind, a series of experiments using simple direct shear tests are conducted in order to understand the frictional properties between geocells filled with granular materials. The 54 test samples are prepared by filling the geocell with granular materials having three different gradations. These samples are tested at three different relative densities under three different normal stress levels. As a result, it was observed that interface resistance between the geocells filled with granular material is found to be generally greater than in the samples without geocells. Additionally, these samples with geocells are found to be stiffer; this is due to the fact that the samples with geocell gained more cohesion because geocells confined the grains within a restricted volume.

scholarly journals Contribution of Particles Size Ranges to Sand Friction

2013 ◽  
Vol 3 (4) ◽  
pp. 497-501 ◽  
Author(s):  
E. Mostefa Kara ◽  
M. Meghachou ◽  
N. Aboubekr
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Granular Material ◽  
Physical Properties ◽  
Friction Angle ◽  
Direct Shear ◽  
Shear Tests ◽  
Direct Shear Tests ◽  
Marine Sand

This work studies the correlation between certain physical properties of granular material such as the friction angle and the grain size distribution. In the laboratory, the determination of friction angle requires hard and expensive testing. Prediction of this parameter from the grading curve proves to be very interesting. Direct shear tests were performed on actual marine sand of Tergha (Algeria) and on seventeen different samples arranged from the same sand with various particle size ranges. Results showed that the friction angle of sand is a result of contribution of various constituent granular classes.

Study on the meso-structure development in direct shear tests of a granular material

2017 ◽  
Vol 314 ◽  
pp. 129-139 ◽  
Author(s):  
Han Yang ◽  
Wen-Jie Xu ◽  
Qi-Cheng Sun ◽  
Yuan Feng
Keyword(s):  
Granular Material ◽  
Direct Shear ◽  
Structure Development ◽  
Shear Tests ◽  
Direct Shear Tests

scholarly journals Discrete Element Modelling of Rubber-Protected Ballast Performance Subjected to Direct Shear Test and Cyclic Loading

2020 ◽  
Vol 12 (7) ◽  
pp. 2836
Author(s):  
Yunlong Guo ◽  
Yameng Ji ◽  
Qiang Zhou ◽  
Valeri Markine ◽  
Guoqing Jing
Keyword(s):  
Direct Shear Test ◽  
Shear Test ◽  
Dynamic Performance ◽  
Experimental Tests ◽  
Discrete Element ◽  
Crumb Rubber ◽  
Discrete Element Modelling ◽  
Direct Shear ◽  
Shear Tests ◽  
Direct Shear Tests

The rubber-protected ballast (RPB) is made from natural ballast particles and crumb rubber particles. The crumb rubber is shredded waste tires. RPB was chosen to replace the ballast as it has higher resistance to breakage and abrasion. However, the static and dynamic performance of the RPB has not been confirmed yet. Towards this end, experimental tests and numerical simulations were utilized to study the feasibility of RPB application. Direct shear tests (DSTs) were performed and a DST model and three-sleeper track model with the discrete element method (DEM) were built. The shear strength, settlement, displacement, and acceleration of the RPB were studied. The results show that the RPB has the advantage of increasing the force (stress) distribution and that the smaller crumb rubber size was more suitable for replacing the ballast particles.

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