Packings of frictionless spherocylinders.,Physical Review E

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Packings of frictionless spherocylinders.
Physical Review E ( IF 2.2 ) Pub Date : 2020-08-05 , DOI: 10.1103/physreve.102.022903
Claus Heussinger ₁

Affiliation

We present simulation results on the properties of packings of frictionless spherocylindrical particles. Starting from a random distribution of particles in space, a packing is produced by minimizing the potential energy of interparticle contacts until a force-equilibrated state is reached. For different particle aspect ratios

α = 10 \dots 40

, we calculate contacts

z

, pressure as well as bulk and shear modulus. Most important is the fraction

f_{0} (α)

of spherocylinders with contacts at both ends, as it governs the jamming threshold

z_{c} (α) = 8 + 2 f_{0} (α)

. These results highlight the important role of the axial “sliding” degree of freedom of a spherocylinder, which is a zero-energy mode but only if no end contacts are present.

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