采用环向周期边界的静力触探三维离散元模拟

doi:10.13722/j.cnki.jrme.2015.1124

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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.

Key words： numerical simulation DEM circumferential periodic boundary cone penetration test fabric anisotropy model test

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	Articles by authors
	YANG Yancheng1
	DENG Yibing1
	SHI Danda1
	XUE Jianfeng2

Cite this article:

YANG Yancheng1,DENG Yibing1,SHI Danda1, et al. Three-dimensional DEM simulation of cone penetration test by using circumferential periodic boundary[J]. , 2016, 35(S1): 3372-3384.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1124 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/3372

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