INVESTIGATION OF CYLINDRICAL SPECIMEN COLLAPSE BEHAVIOR ON THE EXPERIMENT AND 3D SMOOTHED-PARTICLE HYDRODYNAMIC ANALYSIS

Smoothed-particle hydrodynamics (SPH) is a computational method used to simulate the dynamics of continuum media, such as solid mechanics and fluid flows. Much research has been conducted using this method to simulate the collapse behavior of soils; however, most of this research has focused on two-dimensional SPH analysis. There is currently little research into modelling the collapse behavior of soil using three-dimensional SPH analysis. Therefore, this paper presents the results of a collapse behavior study of cylindrical sand specimens, comparing experimental results with a three-dimensional SPH analysis. The experiments were conducted by pulling a cylindrical container from a column of sand and measuring the dimensions of the resulting diffusion cone. The frictional properties of the table surface and the rate of pulling were varied to determine their effects and compare analysis results. The diffusion cone geometries determined by SPH analysis showed good consistency with the observed experimental results, suggesting promising application of three-dimensional SPH analysis to the modelling of soil collapse behavior.