Structural and Micromechanical Properties of Ternary Granular Packings: Effect of Particle Size Ratio and Number Fraction of Particle Size Classes
| Autor: | Mateusz Stasiak, Jalal Kafashan, Joanna Wiącek |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Particle number 0211 other engineering and technologies Thermodynamics 02 engineering and technology lcsh:Technology Article Stress (mechanics) micromechanics General Materials Science structure lcsh:Microscopy discrete element method Porosity lcsh:QC120-168.85 021101 geological & geomatics engineering lcsh:QH201-278.5 lcsh:T ternary granular packings Micromechanics 021001 nanoscience & nanotechnology Critical value Discrete element method number fraction of particle size classes lcsh:TA1-2040 particle size ratio lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering Particle size lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology Ternary operation lcsh:TK1-9971 |
| Zdroj: | Materials Materials, Vol 13, Iss 2, p 339 (2020) Volume 13 Issue 2 |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma13020339 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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