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首页> 外文期刊>Industrial and organizational psychology >Structural and Micromechanical Properties of Ternary Granular Packings: Effect of Particle Size Ratio and Number Fraction of Particle Size Classes
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Structural and Micromechanical Properties of Ternary Granular Packings: Effect of Particle Size Ratio and Number Fraction of Particle Size Classes

机译：三元粒状填料的结构和微机械性能：粒度尺寸比和粒度级数的影响

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摘要

The confined uniaxial tests of packings with discrete particle size distribution (PSD) were modeled with the discrete element method. Ternary packings of spheres with PSD uniform or nonuniform by number of particles were examined in three-dimensional (3D) system. The study addressed an effect of the particle size ratio and the particle size fraction on structural and micromechanical properties of mixtures. A study of packing structure included porosity and coordination numbers, while the investigation of micromechanical properties included distribution of normal contact forces and stress transmission through the packing. A micro-scale investigation of the effect of particle size ratio on structure and mechanics of the ternary packings revealed a strong relationship between the properties of sample and the value of parameter till its critical value was reached. A further increase in particle size ratio did not significantly affect properties of packings. Contrary to the porosity and coordination numbers, the partial stresses were highly affected by the fraction of particle size classes in ternary mixtures. The contribution of the partial stress into the global stress was determined by number fraction of particles in packings with small particle size ratio, while it was mainly determined by particle size ratio in packings with small particle size ratio.
机译：采用离散元素法建模了具有离散粒度分布（PSD）的封装的狭窄的单轴试验。在三维（3D）系统中检查了具有PSD均匀或非颗粒数量的PSD均匀或非均匀的三元填料。该研究解决了粒度比和粒度分数对混合物结构和微机械性能的影响。填料结构的研究包括孔隙率和配位数，而微机械性能的研究包括普通接触力分布和通过包装的应力传输。微尺度调查粒度比对三元填料结构和力学的影响揭示了样品的性质与参数的价值之间的强烈关系，直到达到其临界值。粒度比的进一步增加不会显着影响包装的性质。与孔隙率和配位数相反，部分应力受到三元混合物中粒度类别的粒度的影响。部分应力进入全局应力的贡献由具有小粒度比的填料中的颗粒的数分数决定，同时它主要通过粒度比的粒度与粒度比的粒度比确定。

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