supported by the National Natural Science Foundation of China (Grant No.10772005);National Basic Research Program of China (Grant No. 2007CB714603)
Numerical simulation results show that the upper bound order of random packing densities of basic 3D objects is cube (0.78) > ellipsoid (0.74) > cylinder (0.72) > spherocylinder (0.69) > tetrahedron (0.68) > cone (0.6...