Micro-scale behavior of granular materials during cyclic loading

- The simulated stress-strain-dilatancy behaved qualitatively similar to that of sands.
- The stress-dilatancy relationship depended significantly on confining pressures during unloading.
- Evolution of coordination number depended on both confining pressures and cyclic loading.
- Microtopology of granular materials was significantly affected by the cyclic loading.
- A strong correlation between the macro- and micro-quantities was observed.