Repulsive Contact Interactions Make Jammed Particulate Systems Inherently Nonharmonic
نویسندگان
چکیده
منابع مشابه
Repulsive contact interactions make jammed particulate systems inherently nonharmonic.
Many jammed particulate systems, such as granular and colloidal materials, interact via repulsive contact forces. We find that these systems possess no harmonic regime in the large system limit (N→∞) for all compressions Δϕ studied, and at jamming onset Δϕ→0 for all N. We perform fixed energy simulations following perturbations with amplitude δ along eigendirections of the dynamical matrix. The...
متن کاملComment on "Repulsive contact interactions make jammed particulate systems inherently nonharmonic".
In their Letter [1], Schreck, Bertrand, O’Hern and Shattuck (SBOS) study nonlinearities in jammed particulate systems that arise when contacts are altered. They conclude that there is “no harmonic regime in the large system limit (N → ∞) for all compressions ∆φ” and that “the density of vibrational modes cannot be described using the dynamical matrix ..., which dramatically affects mechanical r...
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Typical quasistatic compression algorithms for generating jammed packings of purely repulsive, frictionless particles begin with dilute configurations and then apply successive compressions with the relaxation of the elastic energy allowed between each compression step. It is well known that during isotropic compression these systems undergo a first-order-like jamming transition at packing frac...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2011
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.107.078301