2025/04/08 by Raphaël Blumenfeld, Blumenfeld, Raphael, Takashi Matsushima +3
Materials Science · Engineering · Chemistry · #Material Dynamics and Properties #Granular flow and fluidized beds #Advanced Physical and Chemical Molecular Interactions
paper · pdf · doi:10.48550/arxiv.2504.06321
We argue that a number of recent experimental and numerical observations point to an ongoing cooperative stress-structure self-organisation (SO) in quasi-static granular dynamics. These observations include: a) detail-insensitive collapses of certain quantities; b) correlations between stress and structure and evidence of entropy-stability competition in settled packings, which cast doubt on most linear stress theories of granular materials; c) detailed balanced steady states, which seem contradictory to the common belief that only systems in thermal equilibrium satisfy detailed balance, but are not, as we explain. We then propose a new statistical mechanical formulation that takes into account the cooperative SO.