Effects of particle compressibility on structural and mechanical properties of compressed soft granular materials

Changes in the mechanical properties of granular materials, induced by variations intrinsic compressibility particles, are investigated means numerical simulations based on combination Finite Element and Contact Dynamics methods. Assemblies athermal 2D particles subjected to quasi-static uni-axial compactions up packing fractions close $1$. Inspired contact mechanics Hertz's limit, we show that effect both global local stresses, can be described considering only fraction system. This result, demonstrated whole range accessible case frictionless remains relevant for moderate inter-particles coefficients friction. The small discrepancies observed with frictional originate from irreversible reorganizations system, later being facilitated particles.