Evaluating the verification of numerical simulation analysis results requires a benchmark for the real behavior of a material. The present report provides a set of experimental data as a benchmark for Discrete Element Method (DEM) analysis. The experiment consisted of the measurement of the particle characteristics and the angles of repose of artificial particles prepared by a 3D printer. The use of a printer is effective for reducing the errors in the particle modeling of the DEM analysis. The particle characteristics of the artificial particles were measured in terms of their size, frictional properties, coefficients of restitution, and elastic stiffness. Then, the angles of repose of the particles were tested under cubical and cylindrical conditions. In addition, the visualization inside samples in the repose state was carried out using X-ray CT analysis. Thus, in the resting state, the strain distribution inside the samples as well as the displacement levels and vectors could be obtained. This technical report is based on the activities of the TC105 domestic committee of the JGS.

评估数值模拟分析结果的验证需要一个材料真实行为的基准。本报告提供了一组实验数据作为离散元方法 (DEM) 分析的基准。该实验包括对由 3D 打印机制备的人造粒子的粒子特性和休止角的测量。使用打印机可以有效地减少 DEM 分析的粒子建模中的错误。人造颗粒的颗粒特性根据它们的尺寸、摩擦特性、恢复系数和弹性刚度来测量。然后，在立方体和圆柱形条件下测试颗粒的休止角。此外，使用 X 射线 CT 分析对静止状态下的样品内部进行可视化。因此，在静止状态下，可以获得样品内部的应变分布以及位移水平和矢量。本技术报告基于 JGS TC105 国内委员会的活动。