Abstract
In order to evaluate the effects of sample preparation method on the shear behavior of granular assemblies, three types of specimens were prepared: FC-specimens compacted by controlling inter-particle friction angle, TC-specimens compacted by controlling compaction time, and CC-specimens compacted by cyclic simple shear loading, respectively. A series of simple shear simulations by DEM on these specimens showed that the relationship between the void ratio and friction angle obtained in simple shear computed for the peak strength was unique irrespectively of the sample preparation methods. However, the shear moduli in small strain range were different for FC-, TC- and CC-specimens. To identify the reason for this difference, the micro-mechanical information such as coordination number, distribution of inter-particle forces were quantitatively evaluated. As a result, the granular packing structures were found to be different between three types of specimens, which might affects the deformation behavior in small strain range.
