Abstract
Physical properties and X-ray tomography images of five different granular materials: glass bead, glass grit, short grain white rice, sorghum and clay granules (Seramis) are investigated to select the most promising materials for numerical simulations and time-lapse X-ray tomography imaging. The examined materials represent granular materials of non-biological origin (glass bead, glass grit and Seramis) and granular plant materials (rice and sorghum). The choice of materials was dictated by their mechanical and packing properties, on one hand, and 3D imaging qualities of granular materials and quantitative particle shape analysis, on the other hand. It was found that materials of biological origin, i.e. rice and sorghum, showed promising characteristics and may be considered as the most appropriate materials for comparison between time-lapse X-ray tomography experiments and numerical simulation.
Highlights
Investigation of granular materials has been driving research and development interest for decades, so as to better understand mechanics an interparticle interactions during different technological processes
The present project focuses on a multi-parameter approach to select materials that fulfill requirements regarding mechanical, physical and geometrical properties of grain beddings for X-ray tomography experiments and numerical simulations based on the Discrete Element Method
The present study has considered a comparison of five granular materials, which differ in origin, shape and chemical structure, but exhibit some similarities in size
Summary
Investigation of granular materials has been driving research and development interest for decades, so as to better understand mechanics an interparticle interactions during different technological processes. As porous materials, are genuinely good candidates for X-ray tomography studies because of strong contrast between matter and air In that respect, it has opened new explorations of long-term researches related to particle packing, interaction, movement, strain localization or shear zone formation during compaction, uni-/multi-axial compression [12,13,14,15,16,17], shearing conditions [18,19,20] or gravitational flow [3,4,21]. The present project focuses on a multi-parameter approach to select materials that fulfill requirements regarding mechanical, physical and geometrical properties of grain beddings for X-ray tomography experiments and numerical simulations based on the Discrete Element Method.
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