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• W3117441790 abstract "We analyze the isotropic compaction of assemblies composed of soft pentagons interacting through classical Coulomb friction via numerical simulations. The effect of the initial particle shape is discussed by comparing packings of pentagons with packings of soft circular particles. We characterize the evolution of the packing fraction, the elastic modulus, and the microstructure (particle rearrangement, connectivity, contact force, and particle stress distributions) as a function of the applied stresses. Both systems behave similarly: the packing fraction increases and tends asymptotically to a maximum value ${ensuremath{phi}}_{mathrm{max}}$, where the bulk modulus diverges. At the microscopic scale we show that particle rearrangements occur even beyond the jammed state, the mean coordination increases as a square root of the packing fraction, and the force and stress distributions become more homogeneous as the packing fraction increases. Soft pentagons experience larger particle rearrangements than circular particles, and such behavior decreases proportionally to the friction. Interestingly, the friction between particles also contributes to a better homogenization of the contact force network in both systems. From the expression of the granular stress tensor we develop a model that describes the compaction behavior as a function of the applied pressure, the Young modulus, and the initial shape of the particles. This model, settled on the joint evolution of the particle connectivity and the contact stress, provides outstanding predictions from the jamming point up to very high densities." @default.
• W3117441790 created "2021-01-05" @default.
• W3117441790 creator A5014423982 @default.
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• W3117441790 date "2021-06-11" @default.
• W3117441790 modified "2023-09-30" @default.
• W3117441790 title "Micromechanical description of the compaction of soft pentagon assemblies" @default.
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• W3117441790 doi "https://doi.org/10.1103/physreve.103.062902" @default.
• W3117441790 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34271662" @default.
• W3117441790 hasPublicationYear "2021" @default.
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