  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 the
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.
