The fractal micro mechanics of normal compression
The fractal micro mechanics of normal compression
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DOI：
10.1016/j.compgeo.2016.04.018
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发表时间：
2016-09
影响因子：
5.3
通讯作者：
J. Bono;G. McDowell
中科院分区：
文献类型：
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作者：
J. Bono;G. McDowell
用离散元法研究了颗粒材料法向压缩的基本分形微观力学。本文研究了随着应力的增加，由两个颗粒尺寸限定的有限分形的出现，以及各种“最小颗粒”定义的演变。据透露，如果粒子是根据它们的配位数分类，然后与4个或更少的接触的所有粒子的体积是成正比的空隙空间。这些颗粒被称为“临界颗粒”，并显示，为第一次，定量地解释随着垂直应力的增加，空隙减少。
The fundamental fractal micro mechanics of normal compression of granular materials is studied using DEM. This paper examines the emergence of a finite fractal bounded by two particle sizes as stress increases, and the evolution of various definitions of the ‘smallest particles’. It is revealed that if particles are categorised according to their coordination number, then the volume of all particles with 4 contacts or fewer is directly proportional to the void space. These particles are called ‘critical particles’ and are shown, for the first time, to explain quantitatively the voids reduction with increasing vertical stress.