Results of simulations of unaxial compression and decompression tests were reported for a 3D system of elastic-perfectly plastic spheres.

• 首先介绍了基于理论接触力学导出的颗粒弹塑性接触模型，进而阐明了基于颗粒离散元法对颗粒物质准静态变形模拟的基本方法。