We report three-dimensional particle mechanics static calculations thatpredict the microstructure evolution during die-compaction of elastic sphericalparticles up to relative densities close to one. We employ a nonlocal contactformulation that remains predictive at high levels of confinement by removingthe classical assumption that contacts between particles are formulated locallyas independent pair-interactions. The approach demonstrates that thecoordination number depends on the level of compressibility, i.e., on thePoisson's ratio, of the particles. Results also reveal that distributions ofcontact forces between particles and between particles and walls, althoughsimilar at jamming onset, are very different at full compaction. Particle-wallforces are in remarkable agreement with experimental measurements reported inthe literature, providing a unifying framework for bridging experimentalboundary observations with bulk behavior.
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