Geomechanics and geotechnics. From micro to macro / Геомеханика и геотехника. От микро до макро

This paper presents an experimental investigation on contact behaviors of idealized granules which are bonded together with cement. First, by using the specimen preparation devices, two aluminum alloy rods with the same size are glued together by cement with the cement water ratio 0.34. Then, by using of auxiliary loading devices, the mechanical behaviors of cementation between the bonded rods are obtained while different forces, such as normal force/shear force/couple force, are applied in different ways. The results show that: (1) The mechanical behaviors for the bonded rods are elasto-brittle in tension tests and stress softening in the compression tests, while the mechanical behaviors of the bonded rods are generally elasto-brittle-plastic in shear tests and elasto-softening-plastic in rotation tests (2) The mechanical behaviors of the bonded rods are in good agreement with the bond contact laws implemented in DEM. <...>