EXPERIMENTAL STUDY ON DEFORMATION OF GEO-GRANULAR MATERIALS BASED ON PHOTOELASTIC TECHNIQUES

The photoelasticity technique can remove the particles basal friction by using density matched. It can be used to study the meso-deformation characteristics of the granular stuff. In this paper, the simple shear photoelasitc experiment is conducted on the granular system with 82% packing fraction. The research results indicate that the direction of force chain(or principle stress) is the relatively short diagonal line direction of the shear box, and cross over the whole granular system. The force chain is disappeared on the boundary of the shear box to get the balancing of stresses status. The normalized deformation vector of the granular materials shows symmetrical in the shear box axial.