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Analysis by x-ray microtomography of a granular packing undergoing compaction
Patrick Richard1, Pierre Philippe, Fabrice Barbe
1GMCM, UMR CNRS 6626, Université de Rennes I, 35042 Rennes Cedex, France. Patrick.Richard@univ-rennes1.fr
Summary
X-ray microtomography revealed how bead packing densifies under vibration. Pore size distribution, consistent with free volume theory, evolved during compaction, matching prior numerical models.
Area of Science:
- Materials Science
- Physics
- Engineering
Background:
- Granular materials exhibit complex behavior during compaction.
- Understanding pore evolution is crucial for predicting material properties.
Purpose of the Study:
- To investigate the structural evolution of bead packing during compaction using X-ray microtomography.
- To analyze pore volume distribution and its relationship with densification.
Main Methods:
- X-ray microtomography was used to capture the internal structure of bead packing.
- Image analysis techniques were employed to study the packing evolution.
- Pore volume distribution was analyzed and compared with theoretical models.
Main Results:
- The study observed the progressive densification of bead packing under vertical vibrations.
- Pore volume distribution showed a large, exponential tail that decreased with increasing compactness.
- Results aligned with the free volume theory for large pores.
Conclusions:
- X-ray microtomography provides valuable insights into granular compaction dynamics.
- The observed pore size evolution supports theoretical predictions.
- Findings are consistent with previous numerical simulations of granular compaction.