Abstract
Almost all of landslides, slope failures on the land and the submarine landslides are related to the granular mechanics. The force distribution in the granular materials before failure is the key point to understand the mechanism of the geo-granular failure. In this paper, the photoelastic experimental technique is applied to show the force chain network development in a photoelastic granular system with soft confining boundaries. The particle positions, orientations and photoelastic response at each shear step are recorded. The coordination number of each particle is detected based on the particle position and photoelastic response, which shows that the granular system reached the jammed state before dilating. Meanwhile, the particle displacements and rotation are calculated by using the Particle Tracking Velocimetery (PTV), and the results show that the displacement and rotation field have very strong correlation in the shear band region.
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