The compaction of blended aggregates of non-spherical linear viscous particles Original Research Article

The approximate discrete-element model [Comput. Methods Appl. Mech. Engrg. 192 (2003) 4929] used to analyze global behavior of single-material aggregates of non-spherical linear viscous particles is extended to simulate compactions of blended granular systems. Based on the triangular mesh system, a new mesh reorganization algorithm for composite aggregates is generated. To verify accuracy of stress calculation in each time step, a multi-zone boundary element method is developed as an analytical model. Solutions of a patch test from two different models are in a great agreement. Infinitesimal area errors during the compaction also demonstrated preciseness of the simulation. Several comparisons among examples of different element number, of various material properties, and of different density are made. A homogenization theory with the finite element modeling is used to investigate the effect of void shape on a periodic porous structure. Results indicate that the factor has considerable effects on overall responses of the whole admixture.