Microstructure evolution of compressible granular systems under large deformations

Marcial Gonzalez, Alberto M. Cuitiño

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We report three-dimensional particle mechanics static calculations that predict the microstructure evolution during die-compaction of elastic spherical particles up to relative densities close to one. We employ a nonlocal contact formulation that remains predictive at high levels of confinement by removing the classical assumption that contacts between particles are formulated locally as independent pair-interactions. The approach demonstrates that the coordination number depends on the level of compressibility, i.e., on Poisson's ratio, of the particles. Results also reveal that distributions of contact forces between particles and between particles and walls, although similar at jamming onset, are very different at full compaction. Particle–wall forces are in remarkable agreement with experimental measurements reported in the literature, providing a unifying framework for bridging experimental boundary observations with bulk behavior.

Original languageEnglish (US)
Pages (from-to)44-56
Number of pages13
JournalJournal of the Mechanics and Physics of Solids
Volume93
DOIs
StatePublished - Aug 1 2016

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • Compaction
  • Contact mechanics
  • Discrete element method
  • Granular systems
  • Microstructure evolution
  • Nonlocal contact formulation
  • Particle mechanics
  • Powders

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