- Title
- Three-dimensional DEM simulation of cone penetration test by using circumferential periodic boundary
- Creator
- Yang, Yangchen; Deng, Yibing; Shi, Danda; Xue, Jianfeng
- Date
- 2016
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/101704
- Identifier
- vital:10700
- Identifier
- ISSN:10006915
- Abstract
- In order to explore the micro-mechanism of CPT, a new circumferential periodic boundary was developed to consider the three-dimensional axisymmetric problem with 1/4 of the cylinder. To validate the method, a drained triaxial test was modeled with the proposed method and the traditional full model. The results are comparable and the proposed method is very effective. The method was further used to simulate a cone penetration test in dry Fontainebleau sand. It was found that, the variation of cone radial stress and tip resistance during penetration from the model are in good agreement with the reported test results. The micromechanical responses, such as the distributions of particle displacement, internal stress and local porosity to cone penetration are extensively studied. The evolutions of fabric anisotropy during penetration are also discussed. The relationship between stress and fabric is quantitatively described using fabric tensor, which reveals the mechanism of cone penetration capacity microscopically. The results of the work not only improve the efficiency of three-dimensional discrete element method(DEM) simulation, but also promote better understanding of CPT mechanism. © 2016, Science Press. All right reserved.
- Publisher
- Academia Sinica
- Relation
- Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering Vol. 35, no. (2016), p. 3372-3384
- Rights
- Copyright © 2016, Science Press. All right reserved.
- Rights
- This metadata is freely available under a CCO license
- Subject
- 0913 Mechanical Engineering; Circumferential periodic boundary; Cone penetration test; DEM; Fabric anisotropy; Model test; Numerical simulation
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