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 1. 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.

通过基于有限元法和接触动力学方法相结合的数值模拟，研究了由颗粒固有压缩率的变化引起的粒状材料机械性能的变化。对无热2D粒子的装配体进行准静态单轴压实，直至填充分数接近1。我们证明，仅考虑以下因素，就可以描述颗粒的可压缩性对整体应力和局部应力的影响。系统的包装分数。在无摩擦颗粒的情况下，该结果在可达到的填充分数的整个范围内得到证明，仍然与中等颗粒间的摩擦系数有关。