Effects of particle compressibility on structural and mechanical properties of compressed soft granular materials
arXiv:2004.01072 · doi:10.1016/j.jmps.2020.104201
Abstract
Changes in the mechanical properties of granular materials, induced by variations in the intrinsic compressibility of the particles, are investigated by means of numerical simulations based on the combination of the Finite Element and Contact Dynamics methods. Assemblies of athermal 2D particles are subjected to quasi-static uni-axial compactions up to packing fractions close to . Inspired by the contact mechanics in the Hertz's limit, we show that the effect of the compressibility of the particles both on the global and the local stresses, can be described by considering only the packing fraction of the system. This result, demonstrated in the whole range of accessible packing fractions in case of frictionless particles, remains relevant for moderate inter-particles coefficients of friction. The small discrepancies observed with frictional particles originate from irreversible local reorganizations in the system, the later being facilitated by the compressibility of the particles.
References in corpus (7)
- On dense granular flows
- Amorphous Systems in Athermal, Quasistatic Shear
- Random Packings of Frictionless Particles
- The Jamming Transition in Granular Systems
- Stress-strain behavior and geometrical properties of packings of elongated particles
- Influence of polydispersity on micromechanics of granular materials
- The tail of the contact force distribution in static granular materials