Micro-characteristics of monodisperse and best-packing mixture samples under one dimensional compression
Micro-characteristics of monodisperse and best-packing mixture samples under one dimensional compression
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DOI：
10.1063/1.4811918
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发表时间：
2013-06
期刊：
影响因子：
--
通讯作者：
N. H. Minh;Y. Cheng
中科院分区：
文献类型：
--
作者：
N. H. Minh;Y. Cheng
采用离散元方法PFC3D软件包，采用球形颗粒和与尺寸相关的线弹性接触模型，对低级配土及其混合料的一维压缩特性进行了研究。模拟结果表明，对于同一级配、不同初始固相含量的土样，在高应力水平下，固相含量与竖向应力之间存在着独特的关系。在相同的应力范围内，这些不同样品的接触力分布落在相似的分布曲线上。在每个系统中，参与传递大于平均（强）接触力的颗粒的尺寸分布也有收敛。结果主要针对砂状单分散材料和最佳填充效率混合材料给出。计算了各接触力对偏应力的累积贡献，结果表明偏应力主要是属性应力。
One dimensional compression behavior of poorly graded soils and their mixtures have been investigated using the discrete element method PFC3D software package with spherical particles and a size-related linear elastic contact model. Simulation results show that, for soil samples of the same grading that were compressed from different initial solid fractions, there exists a unique relationship between solid fraction and vertical stress at high stress levels. Contact force distributions of these different samples fall on a similar distribution curve in the same stress range. There is also a convergence for the size distributions of particles involved in the transmission of greater-than-average (strong) contact forces in each system. The results are mainly presented for a sand-like monodisperse material and a best packing efficiency mixture material. Cumulative contributions of individual contact forces to the deviator stress were calculated and the results show that the deviator stress is primarily attribut...