Computational study on the behaviors of granular materials under mechanical cycling

摘要: Considering that fusion pebble beds are probably subjected to the cyclic compression excitation in their future applications, we presented a computational study report effect of mechanical cycling on behaviors granular matter. The correctness our numerical experiments was confirmed by comparison with effective medium theory. Under loads, fast compaction observed evolve stretched exponential law. Besides, increasing stiffening packing structure, especially decreasing moduli pressure dependence due consolidation, also observed. For force chains inside beds, both internal distribution and spatial would become increasingly uniform as external perturbation proceeded therefore produced stress relief grains. In this case, originally proposed 3-parameter Mueth function found fail describe distribution. Thereby, its improved functional form 4 parameters here proved better fit data. These findings will provide more detailed information for relevant design analysis.