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- W2890887073 abstract "By means of extensive three-dimensional contact dynamics simulations, we analyze the strength properties and microstructure of a granular asteroid, modeled as a self-gravitating cohesive granular aggregate composed of spherical particles, and subjected to diametrical compression tests. We show that, for a broad range of system parameters (shear rate, cohesive forces, asteroid diameter), the behavior can be described by a modified inertial number that incorporates interparticle cohesion and gravitational forces. At low inertial numbers, the behavior is ductile with a well-defined stress peak that scales with internal pressure with a prefactor $ensuremath{simeq}0.9$. As the inertial number increases, both the prefactor and fluctuations around the mean increase, evidencing a dynamical crisis resulting from the destabilizing effect of particle inertia. From a micromechanical description of the contact and force networks, we propose a model that accounts for solid fraction, local stress, particle connectivity, and granular texture. In the limit of small inertial numbers, we find a very good agreement of the theoretical estimate of compressive strength, evidencing the major role of these structural parameters for the modeled aggregates." @default.
- W2890887073 created "2018-09-27" @default.
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- W2890887073 date "2018-09-10" @default.
- W2890887073 modified "2023-09-27" @default.
- W2890887073 title "Scaling behavior of cohesive self-gravitating aggregates" @default.
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- W2890887073 doi "https://doi.org/10.1103/physreve.98.030901" @default.
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